Experimental Investigation of a Turbulent Density Field Interacting with a Normal Shock Wave
The interaction of a normal shock wave with a compressible turbulent flow is studied experimentally by means of an optical speckle technique. The turbulence is generated by passing the air from the driver section of a shock tube through a turbulence grid. The experiments are aimed at minimizing or avoiding sources of possible errors that might have affected the measurements reported earlier by Keller and Merzkirch (1990). First results how a slight increase of turbulent length scales after the shock interaction and a definite amplification expressed by an increase of the energy spectrum amplitude.
Key wordsShock wave Turbulence Optical speckle method
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