高焓膨胀波管的气动实验

Aerodynamic experiment of high enthalpy expansion tube

该研究简报介绍了用膨胀波管产生高超声速气流的实验结果。用压力传感器测量了激波管内的激波速度,用激光全息摄影拍摄了飞船返回舱模型吹风时的激波形状,证实了在膨胀波管中建立了可用的流动条件。

This brief communication introduces an experiment of hypersonic flow using high enthalpy expansion tube. The velocity of the shock wave was measured by pressure transducers along the tube. The shape of shock wave around a capsule model was visualized by holographic interferometry. The experiment showed that usable test flow was obtained with the expansion tube. It is understood that the free piston driver and the evacuating are two key techniques in design and operation of expansion tubes.