Abstract

To analyze the flow field around models it is very important to understand the streamlines around the models. However, it has been almost impossible to visualize such streamlines around hypersonic models. Because, the hypersonic flow obtained in laboratory is, in general, very high speed, low density, and short duration. However, methods for visualizing hypersonic streamlines under these experimental conditions have been developed by using the electrical discharge. The principle of the method and visualized hypersonic streamline are demonstrated in this paper.