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Bieberle A, Hoffmann R, Döß A, Schleicher E, Hampel U. Modular and Cost-Effective Computed Tomography Design. SENSORS (BASEL, SWITZERLAND) 2024; 24:2568. [PMID: 38676186 PMCID: PMC11054158 DOI: 10.3390/s24082568] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/12/2024] [Revised: 04/10/2024] [Accepted: 04/12/2024] [Indexed: 04/28/2024]
Abstract
We present a modular and cost-effective gamma ray computed tomography system for multiphase flow investigations in industrial apparatuses. It mainly comprises a 137Cs isotopic source and an in-house-assembled detector arc, with a total of 16 scintillation detectors, offering a quantum efficiency of approximately 75% and an active area of 10 × 10 mm2 each. The detectors are operated in pulse mode to exclude scattered gamma photons from counting by using a dual-energy discrimination stage. Flexible application of the computed tomography system, i.e., for various object sizes and densities, is provided by an elaborated detector arc design, in combination with a scanning procedure that allows for simultaneous parallel beam projection acquisition. This allows the scan time to be scaled down with the number of individual detectors. Eventually, the developed scanner successfully upgrades the existing tomography setup in the industry. Here, single pencil beam gamma ray computed tomography is already used to study hydraulics in gas-liquid contactors, with inner diameters of up to 440 mm. We demonstrate the functionality of the new system for radiographic and computed tomographic scans of DN110 and DN440 columns that are operated at varying iso-hexane/nitrogen liquid-gas flow rates.
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Affiliation(s)
- André Bieberle
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Fluid Dynamics, Bautzner Landstraße 400, 01328 Dresden, Germany; (A.D.); (E.S.); (U.H.)
| | - Rainer Hoffmann
- Linde GmbH, Linde Engineering, Dr.-Carl-von-Linde-Straße 6-14, 82049 Pullach bei München, Germany;
| | - Alexander Döß
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Fluid Dynamics, Bautzner Landstraße 400, 01328 Dresden, Germany; (A.D.); (E.S.); (U.H.)
| | - Eckhard Schleicher
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Fluid Dynamics, Bautzner Landstraße 400, 01328 Dresden, Germany; (A.D.); (E.S.); (U.H.)
| | - Uwe Hampel
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Fluid Dynamics, Bautzner Landstraße 400, 01328 Dresden, Germany; (A.D.); (E.S.); (U.H.)
- Institute of Power Engineering, TUD Dresden University of Technology, 01062 Dresden, Germany
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2
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Vysotskii VI, Rusov VD, Zelentsova TN, Vysotskyy MV, Smolyar VP. Correlation Method of 3-D Detection of Distant Sources of Gamma Radiation and Neutrinos by Intensity Interferometry. NUCL TECHNOL 2023. [DOI: 10.1080/00295450.2022.2147389] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/11/2023]
Affiliation(s)
| | - V. D. Rusov
- Odessa Polytechnic National University, Odessa, Ukraine
| | | | | | - V. P. Smolyar
- Odessa Polytechnic National University, Odessa, Ukraine
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3
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Xiong J, Zhang Z, Zhou H, Zhu S, Pan S, Ren G, Chen H, Pan J. Growth and Characterization of Mixed Halide Scintillators K
2
LaCl
x
Br
5−
x
:Ce. CRYSTAL RESEARCH AND TECHNOLOGY 2021. [DOI: 10.1002/crat.202100149] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Jianhui Xiong
- State Key Laboratory Base of Novel Function Materials and Preparation Science School of Material Sciences and Chemical Engineering Ningbo University Ningbo Zhejiang 315211 China
| | - Zheng Zhang
- State Key Laboratory Base of Novel Function Materials and Preparation Science School of Material Sciences and Chemical Engineering Ningbo University Ningbo Zhejiang 315211 China
| | - Haichao Zhou
- State Key Laboratory Base of Novel Function Materials and Preparation Science School of Material Sciences and Chemical Engineering Ningbo University Ningbo Zhejiang 315211 China
| | - Shujun Zhu
- State Key Laboratory Base of Novel Function Materials and Preparation Science School of Material Sciences and Chemical Engineering Ningbo University Ningbo Zhejiang 315211 China
| | - Shangke Pan
- State Key Laboratory Base of Novel Function Materials and Preparation Science School of Material Sciences and Chemical Engineering Ningbo University Ningbo Zhejiang 315211 China
- Key Laboratory of Photoelectric Materials and Devices of Zhejiang Province Ningbo Zhejiang 315211 China
| | - Guohao Ren
- Shanghai Institute of Ceramics Chinese Academy of Sciences Shanghai 201899 China
| | - Hongbing Chen
- State Key Laboratory Base of Novel Function Materials and Preparation Science School of Material Sciences and Chemical Engineering Ningbo University Ningbo Zhejiang 315211 China
- Key Laboratory of Photoelectric Materials and Devices of Zhejiang Province Ningbo Zhejiang 315211 China
| | - Jianguo Pan
- State Key Laboratory Base of Novel Function Materials and Preparation Science School of Material Sciences and Chemical Engineering Ningbo University Ningbo Zhejiang 315211 China
- Key Laboratory of Photoelectric Materials and Devices of Zhejiang Province Ningbo Zhejiang 315211 China
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4
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Merzari E, Cheung FB, Bajorek SM, Hassan Y. 40th Anniversary of the first international topical meeting on nuclear reactor thermal-hydraulics: Highlights of thermal-hydraulics research in the past four decades. NUCLEAR ENGINEERING AND DESIGN 2021. [DOI: 10.1016/j.nucengdes.2020.110965] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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5
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Gładyszewski K, Groβ K, Bieberle A, Schubert M, Hild M, Górak A, Skiborowski M. Evaluation of performance improvements through application of anisotropic foam packings in rotating packed beds. Chem Eng Sci 2021. [DOI: 10.1016/j.ces.2020.116176] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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6
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Guo W, Liu C, Wang L, Huang R. Response of thermal diffusion to gas–liquid stratified/wave flow and its application in measurement. Chem Eng Sci 2020. [DOI: 10.1016/j.ces.2020.115789] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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7
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Comparison of Gas–Liquid Flow Characteristics in Geometrically Different Swirl Generating Devices. ENERGIES 2019. [DOI: 10.3390/en12244653] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The gas–liquid flow characteristics for blade, single, and the double-helical swirl elements were numerically investigated and compared in this work. The Euler–Euler model assuming bi-modal bubble size distributions was used. The experiment, conducted in a vertical pipe equipped with a static blade swirl element, was used as the basis for the computational fluid dynamics (CFD) simulations. In the experiment, high-resolution gamma-ray computed tomography (HireCT) was used to measure the gas volume fractions at several planes within the blade swirl element. The resulting calculated profiles of the pressure, liquid and gas velocities as well as the gas fraction showed a large influence of the swirl elements’ geometry. The evolution and characteristics of the calculated gas–liquid phase distributions in different measurement planes were found to be unique for each type of swirl element. A single gas core in the center of the pipe was observed from the simulation of the blade element, while multiple cores were observed from the simulations of the single and double helix elements. The cross-sectional gas distribution downstream of the single and double helical elements changed drastically within a relatively short distance downstream of the elements. In contrast, the single gas core downstream of the blade element was more stable.
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8
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Romanowski A, Łuczak P, Grudzień K. X-ray Imaging Analysis of Silo Flow Parameters Based on Trace Particles Using Targeted Crowdsourcing. SENSORS (BASEL, SWITZERLAND) 2019; 19:E3317. [PMID: 31357713 PMCID: PMC6695825 DOI: 10.3390/s19153317] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/03/2019] [Revised: 07/26/2019] [Accepted: 07/26/2019] [Indexed: 11/20/2022]
Abstract
This paper presents a novel method for tomographic measurement and data analysis based on crowdsourcing. X-ray radiography imaging was initially applied to determine silo flow parameters. We used traced particles immersed in the bulk to investigate gravitational silo flow. The reconstructed images were not perfect, due to inhomogeneous silo filling and nonlinear attenuation of the X-rays on the way to the detector. Automatic processing of such data is not feasible. Therefore, we used crowdsourcing for human-driven annotation of the trace particles. As we aimed to extract meaningful flow parameters, we developed a modified crowdsourcing annotation method, focusing on selected important areas of the silo pictures only. We call this method "targeted crowdsourcing", and it enables more efficient crowd work, as it is focused on the most important areas of the image that allow determination of the flow parameters. The results show that it is possible to analyze volumetric material structure movement based on 2D radiography data showing the location and movement of tiny metal trace particles. A quantitative description of the flow obtained from the horizontal and vertical velocity components was derived for different parts of the model silo volume. Targeting the attention of crowd workers towards either a specific zone or a particular particle speeds up the pre-processing stage while preserving the same quality of the output, quantified by important flow parameters.
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Affiliation(s)
- Andrzej Romanowski
- Institute of Applied Computer Science, Lodz University of Technology, 90924 Lodz, Stefanowskiego 18/22 str., Poland.
| | - Piotr Łuczak
- Institute of Applied Computer Science, Lodz University of Technology, 90924 Lodz, Stefanowskiego 18/22 str., Poland
| | - Krzysztof Grudzień
- Institute of Applied Computer Science, Lodz University of Technology, 90924 Lodz, Stefanowskiego 18/22 str., Poland
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9
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Groß K, Bieberle A, Gladyszewski K, Schubert M, Hampel U, Skiborowski M, Górak A. Analysis of Flow Patterns in High‐Gravity Equipment Using Gamma‐Ray Computed Tomography. CHEM-ING-TECH 2019. [DOI: 10.1002/cite.201800085] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Kai Groß
- TU DortmundLaboratory of Fluid Separations Emil-Figge-Straße 70 44227 Dortmund Germany
| | - André Bieberle
- Helmholtz-Zentrum Dresden-RossendorfInstitute of Fluid Dynamics Bautzener Landstraße 400 01328 Dresden Germany
| | - Konrad Gladyszewski
- TU DortmundLaboratory of Fluid Separations Emil-Figge-Straße 70 44227 Dortmund Germany
| | - Markus Schubert
- Helmholtz-Zentrum Dresden-RossendorfInstitute of Fluid Dynamics Bautzener Landstraße 400 01328 Dresden Germany
| | - Uwe Hampel
- Helmholtz-Zentrum Dresden-RossendorfInstitute of Fluid Dynamics Bautzener Landstraße 400 01328 Dresden Germany
- Technische Universität DresdenChair of Imaging Techniques in Energy and Process Engineering 01062 Dresden Germany
| | - Mirko Skiborowski
- TU DortmundLaboratory of Fluid Separations Emil-Figge-Straße 70 44227 Dortmund Germany
| | - Andrzej Górak
- TU DortmundLaboratory of Fluid Separations Emil-Figge-Straße 70 44227 Dortmund Germany
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10
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Embedded Smart Antenna for Non-Destructive Testing and Evaluation (NDT&E) of Moisture Content and Deterioration in Concrete. SENSORS 2019; 19:s19030547. [PMID: 30696110 PMCID: PMC6387273 DOI: 10.3390/s19030547] [Citation(s) in RCA: 60] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/14/2018] [Revised: 01/14/2019] [Accepted: 01/23/2019] [Indexed: 11/23/2022]
Abstract
Concrete failure will lead to serious safety concerns in the performance of a building structure. It is one of the biggest challenges for engineers to inspect and maintain the quality of concrete throughout the service years in order to prevent structural deterioration. To date, a lot of research is ongoing to develop different instruments to inspect concrete quality. Detection of moisture ingress is important in the structural monitoring of concrete. This paper presents a novel sensing technique using a smart antenna for the non-destructive evaluation of moisture content and deterioration inspection in concrete blocks. Two different standard concrete samples (United Kingdom and Malaysia) were investigated in this research. An electromagnetic (EM) sensor was designed and embedded inside the concrete to detect the moisture content within the structure. In addition, CST microwave studio was used to validate the theoretical model of the EM sensor against the test data. The results demonstrated that the EM sensor at 2.45 GHz is capable of detecting the moisture content in the concrete with linear regression of R2 = 0.9752. Furthermore, identification of different mix ratios of concrete were successfully demonstrated in this paper. In conclusion, the EM sensor is capable of detecting moisture content non-destructively and could be a potential technique for maintenance and quality control of the building performance.
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11
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Gajjar P, Jørgensen JS, Godinho JRA, Johnson CG, Ramsey A, Withers PJ. New software protocols for enabling laboratory based temporal CT. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2018; 89:093702. [PMID: 30278752 DOI: 10.1063/1.5044393] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/12/2018] [Accepted: 08/12/2018] [Indexed: 05/25/2023]
Abstract
Temporal micro-computed tomography (CT) allows the non-destructive quantification of processes that are evolving over time in 3D. Despite the increasing popularity of temporal CT, the practical implementation and optimisation can be difficult. Here, we present new software protocols that enable temporal CT using commercial laboratory CT systems. The first protocol drastically reduces the need for periodic intervention when making time-lapse experiments, allowing a large number of tomograms to be collected automatically. The automated scanning at regular intervals needed for uninterrupted time-lapse CT is demonstrated by analysing the germination of a mung bean (vigna radiata), whilst the synchronisation with an in situ rig required for interrupted time-lapse CT is highlighted using a shear cell to observe granular segregation. The second protocol uses golden-ratio angular sampling with an iterative reconstruction scheme and allows the number of projections in a reconstruction to be changed as sample evolution occurs. This overcomes the limitation of the need to know a priori what the best time window for each scan is. The protocol is evaluated by studying barite precipitation within a porous column, allowing a comparison of spatial and temporal resolution of reconstructions with different numbers of projections. Both of the protocols presented here have great potential for wider application, including, but not limited to, in situ mechanical testing, following battery degradation and chemical reactions.
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Affiliation(s)
- Parmesh Gajjar
- Henry Moseley X-Ray Imaging Facility, School of Materials, The University of Manchester, Oxford Road, Manchester M13 9PL, United Kingdom
| | - Jakob S Jørgensen
- Henry Moseley X-Ray Imaging Facility, School of Materials, The University of Manchester, Oxford Road, Manchester M13 9PL, United Kingdom
| | - Jose R A Godinho
- Henry Moseley X-Ray Imaging Facility, School of Materials, The University of Manchester, Oxford Road, Manchester M13 9PL, United Kingdom
| | - Chris G Johnson
- School of Mathematics, The University of Manchester, Oxford Road, Manchester M13 9PL, United Kingdom
| | - Andrew Ramsey
- Nikon Metrology Inc., 12701 Grand River Avenue, Brighton, Michigan 48116, USA
| | - Philip J Withers
- Henry Moseley X-Ray Imaging Facility, School of Materials, The University of Manchester, Oxford Road, Manchester M13 9PL, United Kingdom
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12
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Experimental investigation of two-phase pipe flow with ultrafast X-ray tomography and comparison with state-of-the-art CFD simulations. NUCLEAR ENGINEERING AND DESIGN 2018. [DOI: 10.1016/j.nucengdes.2017.06.035] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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13
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Bieberle A, Neumann M, Hampel U. Advanced process-synchronized computed tomography for the investigation of periodic processes. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2018; 89:073111. [PMID: 30068132 DOI: 10.1063/1.5038423] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/03/2018] [Accepted: 06/27/2018] [Indexed: 06/08/2023]
Abstract
Computed tomography (CT) is known for giving cross-sectional images of a body. As tomographic scans require mechanical movement of components, data acquisition is commonly too slow to capture dynamic processes, which are faster than the acquisition time for a single image. Time-averaged angle-resolved CT imaging is a more recent method, which has demonstrated a capability to sharply image fast rotating machinery components by synchronizing data acquisition with rotation. However, in this modality, all information on static parts disappears. In this paper, a novel data acquisition approach is introduced that combines both CT imaging methods. Eventually, the developed method is exemplarily applied to the study of gas-liquid flow in an industrial centrifugal pump using high-resolution gamma-ray tomography imaging.
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Affiliation(s)
- André Bieberle
- Institute of Fluid Dynamics, Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstr. 400, 01328 Dresden, Germany
| | - Martin Neumann
- Institute of Fluid Dynamics, Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstr. 400, 01328 Dresden, Germany
| | - Uwe Hampel
- Institute of Fluid Dynamics, Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstr. 400, 01328 Dresden, Germany
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14
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Putra RA, Schäfer T, Neumann M, Lucas D. CFD studies on the gas-liquid flow in the swirl generating device. NUCLEAR ENGINEERING AND DESIGN 2018. [DOI: 10.1016/j.nucengdes.2018.03.034] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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15
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Lichti M, Bart HJ. Particle Measurement Techniques in Fluid Process Engineering. CHEMBIOENG REVIEWS 2018. [DOI: 10.1002/cben.201800001] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Markus Lichti
- Technische Universität Kaiserslautern; Chair of Separation Science and Technology; P.O. Box 3049 67653 Kaiserslautern Germany
| | - Hans-Jörg Bart
- Technische Universität Kaiserslautern; Chair of Separation Science and Technology; P.O. Box 3049 67653 Kaiserslautern Germany
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16
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Affiliation(s)
- Markus Lichti
- Technische Universität Kaiserslautern; Lehrstuhl für Thermische Verfahrenstechnik; Postfach 3049 67653 Kaiserslautern Deutschland
| | - Hans-Jörg Bart
- Technische Universität Kaiserslautern; Lehrstuhl für Thermische Verfahrenstechnik; Postfach 3049 67653 Kaiserslautern Deutschland
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17
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Döß A, Schubert M, Bieberle A, Hampel U. Non-invasive determination of gas phase dispersion coefficients in bubble columns using periodic gas flow modulation. Chem Eng Sci 2017. [DOI: 10.1016/j.ces.2017.05.019] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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18
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Schäfer T, Neumann M, Bieberle A, Hampel U. Experimental investigations on a common centrifugal pump operating under gas entrainment conditions. NUCLEAR ENGINEERING AND DESIGN 2017. [DOI: 10.1016/j.nucengdes.2017.02.035] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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19
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Experimental investigation of the pebble bed structure by using gamma ray tomography. NUCLEAR ENGINEERING AND DESIGN 2016. [DOI: 10.1016/j.nucengdes.2016.10.009] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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20
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A library least-squares approach for scatter correction in gamma-ray tomography. Radiat Phys Chem Oxf Engl 1993 2015. [DOI: 10.1016/j.radphyschem.2014.11.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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21
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A new method for ultrasound detection of interfacial position in gas-liquid two-phase flow. SENSORS 2014; 14:9093-116. [PMID: 24858961 PMCID: PMC4063018 DOI: 10.3390/s140509093] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/03/2013] [Revised: 05/14/2014] [Accepted: 05/19/2014] [Indexed: 11/17/2022]
Abstract
Ultrasonic measurement techniques for velocity estimation are currently widely used in fluid flow studies and applications. An accurate determination of interfacial position in gas-liquid two-phase flows is still an open problem. The quality of this information directly reflects on the accuracy of void fraction measurement, and it provides a means of discriminating velocity information of both phases. The algorithm known as Velocity Matched Spectrum (VM Spectrum) is a velocity estimator that stands out from other methods by returning a spectrum of velocities for each interrogated volume sample. Interface detection of free-rising bubbles in quiescent liquid presents some difficulties for interface detection due to abrupt changes in interface inclination. In this work a method based on velocity spectrum curve shape is used to generate a spatial-temporal mapping, which, after spatial filtering, yields an accurate contour of the air-water interface. It is shown that the proposed technique yields a RMS error between 1.71 and 3.39 and a probability of detection failure and false detection between 0.89% and 11.9% in determining the spatial-temporal gas-liquid interface position in the flow of free rising bubbles in stagnant liquid. This result is valid for both free path and with transducer emitting through a metallic plate or a Plexiglas pipe.
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22
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Barth T, Kulenkampff J, Bras S, Gründig M, Lippmann-Pipke J, Hampel U. Positron emission tomography in pebble beds. Part 2: Graphite particle deposition and resuspension. NUCLEAR ENGINEERING AND DESIGN 2014. [DOI: 10.1016/j.nucengdes.2013.07.015] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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23
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Barth T, Ludwig M, Kulenkampff J, Gründig M, Franke K, Lippmann-Pipke J, Hampel U. Positron emission tomography in pebble beds. Part 1: Liquid particle deposition. NUCLEAR ENGINEERING AND DESIGN 2014. [DOI: 10.1016/j.nucengdes.2013.03.011] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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24
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Bieberle A, Härting HU, Rabha S, Schubert M, Hampel U. Gamma-Ray Computed Tomography for Imaging of Multiphase Flows. CHEM-ING-TECH 2013. [DOI: 10.1002/cite.201200250] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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25
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Bieberle A, Nehring H, Berger R, Arlit M, Härting HU, Schubert M, Hampel U. Compact high-resolution gamma-ray computed tomography system for multiphase flow studies. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2013; 84:033106. [PMID: 23556806 DOI: 10.1063/1.4795424] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
In this paper, a compact high-resolution gamma-ray Computed Tomography (CompaCT) measurement system for multiphase flow studies and tomographic imaging of technical objects is presented. Its compact and robust design makes it particularly suitable for studies on industrial facilities and outdoor applications. Special care has been given to thermal ruggedness, shock resistance, and radiation protection. Main components of the system are a collimated (137)Cs isotopic source, a thermally stabilised modular high-resolution gamma-ray detector arc with 112 scintillation detector elements, and a transportable rotary unit. The CompaCT allows full CT scans of objects with a diameter of up to 130 mm and can be operated with any tilting angle from 0° (horizontal) to 90° (vertical).
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Affiliation(s)
- A Bieberle
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Fluid Dynamics, Bautzner Landstraße 400, 01328 Dresden, Germany.
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26
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Visscher F, Bieberle A, Schubert M, van der Schaaf J, de Croon MHJM, Hampel U, Schouten JC. Water and n-Heptane Volume Fractions in a Rotor-Stator Spinning Disc Reactor. Ind Eng Chem Res 2012. [DOI: 10.1021/ie301439s] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Frans Visscher
- Laboratory of Chemical Reactor
Engineering, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - André Bieberle
- Institute of Fluid Dynamics, Helmholtz-Zentrum Dresden-Rossendorf, P.O. Box 510119,
01314 Dresden, Germany
| | - Markus Schubert
- Institute of Fluid Dynamics, Helmholtz-Zentrum Dresden-Rossendorf, P.O. Box 510119,
01314 Dresden, Germany
| | - John van der Schaaf
- Laboratory of Chemical Reactor
Engineering, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - Mart H. J. M. de Croon
- Laboratory of Chemical Reactor
Engineering, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - Uwe Hampel
- Institute of Fluid Dynamics, Helmholtz-Zentrum Dresden-Rossendorf, P.O. Box 510119,
01314 Dresden, Germany
| | - Jaap C. Schouten
- Laboratory of Chemical Reactor
Engineering, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
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27
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Xue Q, Wang H, Cui Z, Yang C. An alternating direction algorithm for two-phase flow visualization using gamma computed tomography. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2012; 83:123703. [PMID: 23277992 DOI: 10.1063/1.4769056] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
In order to build high-speed imaging systems with low cost and low radiation leakage, the number of radioactive sources and detectors in the multiphase flow computed tomography (CT) system has to be limited. Moreover, systematic and random errors are inevitable in practical applications. The limited and corrupted measurement data have made the tomographic inversion process the most critical part in multiphase flow CT. Although various iterative reconstruction algorithms have been developed based on least squares minimization, the imaging quality is still inadequate for the reconstruction of relatively complicated bubble flow. This paper extends an alternating direction method (ADM), which is originally proposed in compressed sensing, to image two-phase flow using a low-energy γ-CT system. An l(1) norm-based regularization technique is utilized to treat the ill-posedness of the inverse problem, and the image reconstruction model is reformulated into one having partially separable objective functions, thereafter a dual-based ADM is adopted to solve the resulting problem. The feasibility is demonstrated in prototype experiments. Comparisons between the ADM and the conventional iterative algorithms show that the former has obviously improved the space resolution in reasonable time.
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Affiliation(s)
- Qian Xue
- School of Electrical Engineering and Automation, Tianjin University, Tianjin 300072, People's Republic of China.
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Tomography measurements of gas holdup in rotating foam reactors with Newtonian, non-Newtonian and foaming liquids. Chem Eng Sci 2011. [DOI: 10.1016/j.ces.2011.01.051] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Bieberle A, Hoppe D, Schleicher E, Hampel U. Void measurement using high-resolution gamma-ray computed tomography. NUCLEAR ENGINEERING AND DESIGN 2011. [DOI: 10.1016/j.nucengdes.2011.03.028] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Bieberle A, Schleicher E, Hampel U. Temperature control design for a high-resolution gamma-ray tomography detector. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2010; 81:014702. [PMID: 20113120 DOI: 10.1063/1.3280184] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
In this paper, a thermal control design for a high-resolution gamma-ray computed tomography detector is presented. It accounts for the generation of heat produced by active electronic components as well as heat transfer from external heat sources. The development and implementation of this feature were motivated by stringent requirements for measurement accuracy at thermal hydraulic test facilities, where ambient thermal conditions are constantly changing. As a first step, the thermal behavior of the existing tomography detector was analyzed, critical components were identified, and different approaches for heat removal were tested. Eventually, an improved thermal detector design was elaborated and a controlled active cooling system was implemented. Performance tests proved its effectiveness and accuracy improvement.
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Affiliation(s)
- André Bieberle
- Institute of Safety Research, Forschungszentrum Dresden-Rossendorf, 01328 Dresden, Germany.
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