some questions for supersonic channel nozzle
 

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.

Re: some questions for supersonic channel nozzle
 

You can avoid separation by optimising the nozzle outer contour.

Re: some questions for supersonic channel nozzle
 

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.