Head-on collision of shock wave induced vortices with solid and perforated walls

Kontis, K., Zare-Behtash, H. and Kounadis, D. (2008) Head-on collision of shock wave induced vortices with solid and perforated walls. Physics of Fluids, 20, [016104]. (doi:10.1063/1.2837172).

Abstract

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 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.

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Contributors

Author: H. Zare-Behtash

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