| 摘要 |
PURPOSE: To make controllable a mach number obtained through a nozzle, improve the capacity of an air duct and contrive the effectiveness of a test by reflecting a shock wave on a shock wave tube, providing a curvature part for producing a skew shock wave and controlling pressure and temperature of gas after shock wave reflection. CONSTITUTION: A skew shock wave 16 is formed on a curvature part 20 on the way of a shock wave tube 4 when the curvature part 20 curved at a curvature angle ofδis provided. In addition, when the curvature angle 6 is changed, the angleθof the shock wave 16 changes, since the strength of the shock wave 16 changes, the curvature angle 6 is arbitrarily modified, and the strength of the shock wave 16 and the increase of pressure and temperature accompanying it are controlled. As the result, the geometrical configuration of a tube passage of the shock wave tube 4 is changed and the curvature angleθof the shock wave 16 is modified, so that since a degree of compression of gas can be changed due to the shock wave 16, the test capacity scope of an air duct can be enlarged and the effectiveness of a test can be contrived.
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