Experimental Study on Grid Turbulence Interacting with a Spherical Shock Wave

Y. Ito, Y. Ato, Y. Sakai, K. Iwano, K. Nagata, Akihiro Sasoh

Wind tunnel experiments are conducted to clarify the turbulence structure in grid-generated turbulence interacting with a spherical shock wave. The Mach number of the shock wave is 1.04 at the measurement location. Streamwise and vertical velocities are measured by the PIV at two instants. One is immediately after the passage of the shock wave and the following expansion fan is passing in the image, and the other is after the passage of the expansion fan and before the arrival of the reflected shock wave from the walls. The results show that the vorticity power spectrum is increased in the entire wavenumber region by the shock-wave interaction at both measured instants.

31st International Symposium on Shock Waves 1

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