The First Electric Discharge Method for Visualizing Three-Dimensional Shock Shapes Around Hypersonic Vehicles

概要

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This paper describes a method for visualizing three-dimensional shock shapes around hypersonic vehicles using an electric discharge. The method is based on the following ideas. When an electric discharge is generated across a shock wave, the radiation intensities from the two regions, one in the freestream and the other in the shock layer, become different from each other. Therfore, the three-dimensional shock shape can be visualized by taking the discharge photograph. In this paper, the theory of the visualization is established qualitatively by considering the relation among the radiation intensity from the electric discharge, excitation function vs. electron energies, and gas molecular number density. By establishing the theory of the visualization, it was found that there exists the most suitable experimental condition for visualizing shock shapes by using the method. By utilizing the result, three-dimensional shock shapes have been visualized successfully.
福山大学の論文