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Wang FQ, Wang Q, Wang YJ, Li ZM, Li R, Li XC, Yang LA, Lu JW. Propagation rules of shock waves in confined space under different initial pressure environments. Sci Rep 2022; 12:14352. [PMID: 35999350 PMCID: PMC9399105 DOI: 10.1038/s41598-022-18567-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2022] [Accepted: 08/16/2022] [Indexed: 11/17/2022] Open
Abstract
In this paper, an initial pressure adjustable explosion vessel was developed, and the effect of negative pressure, positive pressure (0.2–1.8 atm) different initial ambient pressure on the explosive shock wave generated by the explosion of explosives was studied. The relationships between the specific impulse, shock wave velocity, the amount of explosive gas products and the ambient pressure were analyzed for different initial pressure environments. It was found that: the overpressure of the blast shock wave decreases with the initial ambient pressure of the explosion, and there exists a negative pressure environment with a dramatic pressure decrease near 0.6 atm, defined as the super-sensitive negative pressure Pcr. The propagation velocity of an explosive wave increases with a decrease in the ambient pressure, and the propagation velocity at a pressure of 1.8 atm is four times less than the velocity at a pressure of 0.2 atm. The production of explosive gas products did not change. The greater the initial pressure of the environment where the explosive is located, the smaller the ratio of the gas generated by the explosion to the initial force gas in the explosion vessel is, and the greater the impact on the propagation of shock waves is. The maximum attenuation of the first specific impulse i1 is 72.97% and the maximum attenuation of the second specific impulse i2 is 72.39%. The experiments provide reference data for high-altitude military confrontation, high-altitude weapons and ammunition development, and deep-earth protection engineering.
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Affiliation(s)
- F Q Wang
- School of Chemical Engineering, Anhui University of Science & Technology, Huainan, 232001, China
| | - Q Wang
- School of Chemical Engineering, Anhui University of Science & Technology, Huainan, 232001, China. .,Engineering Laboratory of Explosive Materials and Technology of Anhui Province, Huainan, 232001, China.
| | - Y J Wang
- BGRIMM Technology Group, Beijing, 100160, China
| | - Z M Li
- School of Civil Engineering and Architecture, Anhui University of Science & Technology, Huainan, 232001, China
| | - R Li
- School of Chemical Engineering, Anhui University of Science & Technology, Huainan, 232001, China
| | - X C Li
- School of Chemical Engineering, Anhui University of Science & Technology, Huainan, 232001, China
| | - L A Yang
- School of Chemical Engineering, Anhui University of Science & Technology, Huainan, 232001, China
| | - J W Lu
- School of Chemical Engineering, Anhui University of Science & Technology, Huainan, 232001, China
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Orlenko EV, Latychevskaia T, Evstafev AV, Orlenko FE. Invariant time-dependent exchange perturbation theory and its application to the particles collision problem. Theor Chem Acc 2015. [DOI: 10.1007/s00214-015-1646-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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