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一.前言为试验从海平面到约27432m的高空高M数导弹,阿诺德工程发展中心(AEDC)建成一座新的空气动力和推进试验设备(APTU),该试验设备为开式的,一个直径为1.219m的管道与一个直径为1.524m的通向大气的排气管道相连而构成的扩压器系统。每个扩压器的长细比都接近8。在1.219m直径的管道与1.524m直径的管道之连接
I. INTRODUCTION In order to test high-altitude, high-M missiles from sea level to about 27432 m, Arnold Engineering Development Center (AEDC) completed a new aerodynamic and propulsion test equipment (APTU) of the open type with a diameter of 1.219m of the pipeline with a diameter of 1.524m to the atmosphere of the exhaust pipe connected to form a diffuser system. The slenderness ratio for each diffuser is close to eight. Connect the 1.219m diameter pipe to the 1.524m diameter pipe