Investigation of shock attenuation in a shock tube using DSMC method

	Investigation of shock attenuation in a shock tube using DSMC method
	Xue XW(薛晓薇); Chen S ; Sun QH(孙泉华)
会议录名称	AIP Conference Proceedings
	2019
会议名称	31st International Symposium on Rarefied Gas Dynamics, RGD 2018
会议日期	23 July 2018 ~ 27 July 2018
会议地点	University of StrathclydeGlasgow; United Kingdom;
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).
ISBN号	9780735418745
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语种	英语
文献类型	会议论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/85091
专题	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.School of Engineering Science, University of Chinese Academy of Sciences, Beijing, 100049, China 3.Department of Mechanics and Aerospace Engineering, Southern University of Science and Technology, Shenzhen, 518055, 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]AIP Conference Proceedings,2019.

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