Investigation of shock attenuation in a shock tube using DSMC method | |
Xue XW(薛晓薇); Chen S; Sun QH(孙泉华) | |
2019 | |
会议日期 | 23 July 2018 ~ 27 July 2018 |
会议地点 | University of StrathclydeGlasgow; United Kingdom; |
英文摘要 | Shock waves propagating in shock tubes or small channels will be constantly attenuated during propagation due to viscous effect and wall heat conduction. The physical mechanism of this attenuation process has not been clearly discussed in the literature although many investigations have studied the laws and extent of shock wave attenuation under various initial conditions. In this work, the DSMC method is employed to study the propagation and attenuation of shock waves in a 2D planar tube. Numerical results show that the thickness of the unsteady velocity boundary layer in the shock coordinate increases nearly proportional to the square root of time whereas the disturbance of wall effects propagates approximately with the sound velocity behind the shock wave. Appreciable shock curvature is clearly seen in the shock wave and boundary layer interaction corner, which is found to be oscillated. Further analysis shows that the oscillation characteristic of the shock profile is caused by the periodic propagation of low-pressure disturbance generated from the wall surface. Finally, shock wave is found to be more severely attenuated in narrower tube or having larger Mach number at the same time moments. © 2019 Author(s). |
会议录 | AIP Conference Proceedings
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语种 | 英语 |
URL标识 | 查看原文 |
ISBN号 | 9780735418745 |
内容类型 | 会议论文 |
源URL | [http://dspace.imech.ac.cn/handle/311007/85091] ![]() |
专题 | 力学研究所_高温气体动力学国家重点实验室 |
作者单位 | 1.State Key Laboratory of High Temperature Gas Dynamics, Institute of Mechanics, Beijing, CAS 100190, China 2.Department of Mechanics and Aerospace Engineering, Southern University of Science and Technology, Shenzhen, 518055, China 3.School of Engineering Science, University of Chinese Academy of Sciences, Beijing, 100049, China |
推荐引用方式 GB/T 7714 | Xue XW,Chen S,Sun QH. Investigation of shock attenuation in a shock tube using DSMC method[C]. 见:. University of StrathclydeGlasgow; United Kingdom;. 23 July 2018 ~ 27 July 2018. |
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