A study on characteristics of shock train inside a shock tube
A study on characteristics of shock train inside a shock tube
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激波管内激波列车特性研究
DOI：
10.1016/j.taml.2017.09.005
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发表时间：
2017
期刊：
影响因子：
--
通讯作者：
H. Kim
中科院分区：
文献类型：
--
作者：
Dong Wook Kim;Tae Ho Kim;H. Kim
激波管是用于研究可压缩气体的高速高温流动的装置。在激波管内，反射激波与边界层之间的相互作用导致复杂的流动现象。最初，在激波管中形成正常激波，该波向管的封闭端迁移，进而导致激波反射。由于边界层与反射激波的相互作用，激波发生分叉。然后分叉的冲击波接近接触表面并产生冲击序列。迄今为止，只有少数研究来调查激波管内的激波链现象。在本研究中，使用非定常可压缩纳维-斯托克斯方程对激波管的二维轴对称模型进行了计算流体动力学 (CFD) 分析。为了研究激波系的详细特性，通过改变激波管长度、直径、激波管内部使用的压力比等不同参数进行参数研究。
Shock tubes are devices which are used in the investigation of high speed and high temperature flow of compressible gas. Inside a shock tube, the interaction between the reflected shock wave and boundary layer leads to a complex flow phenomenon. Initially a normal shock wave is formed in the shock tube which migrates toward the closed end of the tube and that in turn leads to the reflection of shock. Due to the boundary layer interaction with the reflected shock, the bifurcation of shock wave takes place. The bifurcated shock wave then approaches the contact surface and shock train is generated. Till date only a few studies have been conducted to investigate this shock train phenomenon inside the shock tube. For the present study a computational fluid dynamics (CFD) analysis has been performed on a two dimensional axi-symmetric model of a shock tube using unsteady, compressible Navier–Stokes equations. In order to investigate the detailed characteristics of shock train, parametric studies have been performed by varying different parameters such as the shock tube length, diameter, pressure ratio used inside the shock tube.