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May21-05, 09:32 AM
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Quote Quote by minger
I'm not an expert or even somewhat knowledgeable in these matters, but....I thought that if you had a convergent-divergent nozzle and flow reached sonic at the throat, then it would accelerate back up where it diverges (nozzles diverge for sonic,supersonic, diffusers converge, opposite of subsonic)
This event could be possible too. The fact is when there are critical conditions just at the throat it can be a sudden transition to anyone of the regimes.

My actual question is if a convergent-divergent nozzle could decelerate a supersonic stream to a subsonic one without any shock wave, merely by the same principle of how it accelerates a subsonic stream to a supersonic one. Would it be mathematically and physically possible such a smooth transition?