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Gu C, Peng W, Tian Z, Zhao J, Wang F, Wang Y, Zhang J. Simulation study on creep deformation of the impeller in lead-bismuth eutectic environment through fluid-solid coupling method. Heliyon 2024; 10:e26035. [PMID: 38370181 PMCID: PMC10869916 DOI: 10.1016/j.heliyon.2024.e26035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2023] [Revised: 02/04/2024] [Accepted: 02/07/2024] [Indexed: 02/20/2024] Open
Abstract
Lead-based reactor is a new type of reactor using liquid lead or lead-bismuth alloy as a coolant. As the core working element of the main pump, the impeller is subjected to a huge load when conveying heavy metal liquids and is highly susceptible to damage. In this study, we used ANSYS and FLUENT software to investigate the stress, deformation, and creep deformation of the nuclear main pump impeller under a liquid lead-bismuth environment by the fluid-solid coupling method. The maximum equivalent force of the impeller was located at the junction of the blade and hub, which was prone to fatigue damage under the action of alternating load. The stress, deformation, and creep characteristics of the impeller blade were observed to generally increase with rotational speed. Particularly, the junction of the blade root and hub exhibited high susceptibility to stress concentration and fatigue damage. At a flow rate of 0.64 m/s and a speed of 690 r/min, the maximum equivalent force was 16.7 MPa, which was lower than the yield strength of 316L stainless steel. Additionally, the maximum deformation was less than 0.63 mm. Over a five-year period, the creep of the impeller ranged from a minimum of 0.228% to a maximum of 0.447%, indicating that the impeller can reliably operate in a liquid lead-bismuth environment for at least five years.
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Affiliation(s)
- Cheng Gu
- College of Materials Science and Engineering, Chongqing University, Chongqing, 400045, China
- National Key Laboratory of Advanced Casting Technologies, Chongqing University, Chongqing, 400044, China
| | - Weili Peng
- College of Materials Science and Engineering, Chongqing University, Chongqing, 400045, China
| | - Zenghui Tian
- College of Materials Science and Engineering, Chongqing University, Chongqing, 400045, China
| | - Jianhua Zhao
- College of Materials Science and Engineering, Chongqing University, Chongqing, 400045, China
- State Key Laboratory of Mechanical Transmission, Chongqing University, Chongqing, 400044, China
- National Key Laboratory of Advanced Casting Technologies, Chongqing University, Chongqing, 400044, China
| | - Fan Wang
- Chongqing Pump Industry Co., Ltd., Chongqing, 400033, China
| | - Yajun Wang
- College of Materials Science and Engineering, Chongqing University, Chongqing, 400045, China
| | - Jiaxuan Zhang
- College of Materials Science and Engineering, Chongqing University, Chongqing, 400045, China
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