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Supersonic Inlet Simulation

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Old   October 16, 2018, 04:32
Default Supersonic Inlet Simulation
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Boitshoko Baloyi
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Hi

I hope you are all well.

I am trying to do a CFD simulation of the flow inside a 2D external compression supersonic inlet that will be used on a ramjet. The simulation captures the oblique shock waves originating from the fore-body perfectly, however, it fails to simulate the normal shock wave that should occur inside the inlet's internal duct. I suspect it has something to do with the back pressure I have applied at the inlet exit. Even though the applied back pressure is high, the pressure of the flow in the inlet is never as high as the applied back pressure.

Does anyone know where I could be going wrong and how to fix this? Your help would be appreciated.

Kind Regards,
Boitshoko
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Old   October 17, 2018, 04:27
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It's been a while since I've done anything compressible, but shouldn't the pressure at that face be completely determined by the upstream conditions?

Is the flow supersonic all the way to your outlet then?
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Old   October 17, 2018, 06:44
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Currently, the flow is supersonic through to the outlet, however, the aim is to simulate the flow such that it is subsonic at the outlet.
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Old   March 11, 2019, 21:05
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Did you ever figure out what boundary conditions to apply? I'm having a similar issue.
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