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some questions for supersonic channel nozzle

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Old   October 25, 2007, 03:10
Default some questions for supersonic channel nozzle
  #1
goldenland
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Hi, everyone,

I am doing some simulation of supersonic nozzle. In my case, the nozzle has a rectangular throat of 5x30mm and a rectangular throat of 5x500mm.

Is it possible to get a non-seperative supersonic flow inside the whole nozzle?? I know that the boundary layer will significantly effect the flow field in the nozzle, but I don't know how to consider it when I build the model and simulate.

Can anyone give me some advices of how to consider this kind of problems? P.S, I have some experience of the simulation of circular supersonic nozzle.

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Old   November 2, 2007, 03:27
Default Re: some questions for supersonic channel nozzle
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Ahmed Yakyaki
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You can avoid separation by optimising the nozzle outer contour.
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Old   November 4, 2007, 22:18
Default Re: some questions for supersonic channel nozzle
  #3
goldenland
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Thank you for your kind reply.

My question is to find the Non-seperation dimensions.

I want to get the nozzle exit width as wide as possible, for example, 500mm. At the same time, I want to decrease the throat size as possible for saving the gas used.

The problem is to find in which condition the seperation will be occures. Then I can decide the throat size and exit size.

Any recommandation will be welcome.
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