conical wall nozzle 锥壁喷管
straight-wall nozzle 直壁喷管
fixed wall nozzle 固壁喷管
flexible wall nozzle 柔壁喷管
nozzle wall 喷嘴壁 ; [航] 喷管壁
adjustable nozzle wall 可调喷管壁
FL-7 is a continuous transonic wind tunnel, which is powered by three engines. Mach number is adjusted by the rotating speed of engines, the flexible wall nozzle and the by-pass valve.
7风洞是以三台航空发动机为动力的跨音速风洞，通过调节发动机转速、柔壁及旁路活门开度来实现对M数的控制。
FL-7 is a continuous transonic wind tunnel, which is powered by three engines. Mach number is adjusted by the rotating speed of engines, the flexible wall nozzle and the by-pass valve.
FL - 7风洞是以三台航空发动机为动力的跨音速风洞，通过调节发动机转速、柔壁及旁路活门开度来实现对M数的控制。
Under the same wall heat condition, with the increase of momentum correction coefficient, viscosity loss of the nozzle increases, but thrust and specific impulse decrease.
在同等壁面热条件下，随着动量调节系数的增加，喷管粘性损失增大，喷管的推力和比冲都将下降；
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