抄録
Spark technique was applied to qualitative velocity profile visualization in hypersonic flows over compression and expansion corners. For comparison, Schlieren measurement and numerical simulation based on the two-dimensional full Navier-Stokes equations were performed. The computational results did not contradict with the Holden criterion. For shock wave visualization, quantitative agreement among the spark, the Schlieren, and the computational results was good. Further, we found that the spark column shapes observed photographically and the computational velocity profiles correlate to each other. The results demonstrate the capability of the technique.
