Head-on collision of shock wave induced vortices with solid and perforated walls
Head-on collision of shock wave induced vortices with solid and perforated walls
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DOI：
10.1063/1.2837172
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发表时间：
2008-01-01
影响因子：
4.6
通讯作者：
Kounadis, D.
中科院分区：
文献类型：
--
作者：
Kontis, K.;An, R.;Kounadis, D.
对激波诱导的涡与平板和穿孔板的相互作用进行了实验研究。实验采用内径为30 mm、马赫数为1.31、1.49和1.61的激波管，在临界驱动条件下进行。驾驶室和驾驶室都使用了空气。采用高速纹影照相技术研究了流动的发展及其与板材的相互作用。为了定量研究流动的相互作用，还进行了两个平板上的壁面压力测量。实验结果表明，由于反射波和迎面而来的诱导涡的流动相互作用，在壁面附近形成了强烈的流动发展区。这种流动行为会在壁面上产生多次压力波动。在穿孔板的情况下，由于板内的内部反射，产生较弱的初始反射波，随后是压缩波。与最初入射的冲击波相比，透射波的强度降低了。(C)2008年美国物理研究所。
An experimental study has been conducted to examine the interaction of shock wave induced vortices with a flat plate and a perforated plate. The experiments were carried out using a 30 mm internal diameter shock-tube at Mach numbers 1.31, 1.49, and 1.61 under critical driver conditions. Air was used both in the driver and driven sections. High-speed schlieren photography was employed to study the flow development and the resulting interactions with the plates. Wall pressure measurements on both plates were also carried out in order to study the flow interactions quantitatively. The experimental results indicated that a region of strong flow development is generated near the wall surface, due to the flow interactions of reflected waves and oncoming induced vortices. This flow behavior causes the generation of multiple pressure fluctuations on the wall. In the case of the perforated plate, a weaker initial reflected wave is produced, which is followed by compression waves, due to the internal reflections within the plate. The transmitted wave is reduced in strength, compared to the initial incident shock wave. (C) 2008 American Institute of Physics.