THE EFFECT OF A SIMPLE THROAT DISTORTION ON THE DOWNSTREAM IN A HYPERSONIC WIND TUNNEL NOZZLE

摘要

An experimental investigation was conducted in the GALCIT 21” Supersonic Wind Tunnel to determine the effect of a known distortion of the throat section of a hypersonic nozzle on the flow in the region downstream from the throat. The flow in the nozzle with a rectangular throat section was compared with the flow in the same nozzle with the throat region distorted to produce a throat height which varied linearly across the throat section. The flow was investigated by means of pitot pressure surveys in the horizontal plane of symmetry of the undistorted nozzle.