| Numerical investigation of the reflection of unsteady decelerating incident shock waves | |
Wang DG(王大高)1,2; Han GL(韩桂来)1,2 ; Liu MK(刘美宽)1,2; Li ZX(李宗贤)1,2; Jiang ZL(姜宗林)1,2
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| Corresponding Author | Jiang, Zonglin([email protected]) |
| Source Publication | PHYSICS OF FLUIDS
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| 2024-07-01 | |
| Volume | 36Issue:7Pages:15 |
| ISSN | 1070-6631 |
| Abstract | The incident shock attenuation phenomenon in shock tube has received widespread interest because of its inevitable influence on experimental gas properties. However, few studies have investigated the cascading effects of the resulting nonuniformity on shock reflection in shock tunnels before the nozzle. This paper describes a numerical study on the unsteady reflection of a decelerating incident shock driven by a decelerating piston, as a simplification of the complex nonideal factors. The initial decay and uniform parameter distributions are generated based on the non-inertial frame. The results indicate that the existence of the nonuniform area forces the reflected shock wave region to undergo a transition process of attenuation and then stability. The final values of the gas parameters in zone 5 will, therefore, deviate from those given by the traditional relation for an ideal shock tube, which are only dependent on the terminal shock Mach number. This affects the determination of the total temperature T-5, which is difficult to measure directly. We discuss the reconstruction of the nonuniform region with the attenuation trajectory of the incident shock wave and find that there is no one-to-one correspondence between this trajectory and the resulting nonuniformity, which introduces additional uncertainties to the predictions. Thus, an analogy method is developed through the multilevel block building algorithm, allowing the total temperature T-5 to be determined using the total pressure p(5) considering the effect of nonuniformity. Further assessments verify the applicability of this method in cases with multidimensional and viscous interactions. |
| DOI | 10.1063/5.0219298 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:001273834000014 |
| WOS Keyword | SIMULATION ; TIME |
| WOS Research Area | Mechanics ; Physics |
| WOS Subject | Mechanics ; Physics, Fluids & Plasmas |
| Funding Project | National Natural Science Foundation of China10.13039/501100001809[12132017] ; National Natural Science Foundation of China[2022YFB3207000] ; National Key Research and Development Program of China[JCTD-2022-02] ; Youth Cross Team CAS[2020019] ; Youth Innovation Promotion Association CAS |
| Funding Organization | National Natural Science Foundation of China10.13039/501100001809 ; National Natural Science Foundation of China ; National Key Research and Development Program of China ; Youth Cross Team CAS ; Youth Innovation Promotion Association CAS |
| Classification | 一类/力学重要期刊 |
| Ranking | 1 |
| Contributor | Jiang, Zonglin |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/96185 |
| Collection | 高温气体动力学国家重点实验室 |
| Affiliation | 1.Chinese Acad Sci, Inst Mech, State Key Lab High Temp Gas Dynam, Beijing 100190, Peoples R China; 2.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China |
| Recommended Citation GB/T 7714 | Wang DG,Han GL,Liu MK,et al. Numerical investigation of the reflection of unsteady decelerating incident shock waves[J]. PHYSICS OF FLUIDS,2024,36,7,:15.Rp_Au:Jiang, Zonglin |
| APA | 王大高,韩桂来,刘美宽,李宗贤,&姜宗林.(2024).Numerical investigation of the reflection of unsteady decelerating incident shock waves.PHYSICS OF FLUIDS,36(7),15. |
| MLA | 王大高,et al."Numerical investigation of the reflection of unsteady decelerating incident shock waves".PHYSICS OF FLUIDS 36.7(2024):15. |
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