Three-Dimensional Shock Wave Reflection over a Corner of Two Intersecting Wedges.

This paper describes the three-dimensional shock wave reflection over a corner of two intersecting wedges. A numerical study was carried out to investigate shock wave reflection in three-dimensional flow fields. The Weighted Average Flux (WAF) method was applied to solve three-dimensional unsteady compressible Euler equations. The results were compared with a numerical simulation using the Harten-Yee TVD finite difference scheme. The WAF method gave high resolution and was found to be useful in simulating this three-dimensional shock wave reflection without use of fine computational grids. The three-dimensional shock wave reflection was also analyzed with the shock polar method valid for two-dimensional obligue shock waves. The results obtained from the shock polar analysis agreed with the numerical simulations. A shock tube experiment was also conducted using double-exposure holographic interferometry. In order to obtain three-dimensional images of shock waves, the time interval between the first and the second exposures was set to be two or three micro seconds. This enabled clear observation of the structures of the three-dimensional shock wave reflection. Good agreement between this flow visualization and the results of the numerical simulations was observed.