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how to calculate subsonic misssile

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Old   September 9, 2004, 09:34
Default how to calculate subsonic misssile
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i calculate a missile ranging from mach0.6 to mach 3, with the angle of attack 2 degree,4 degree,and 8 degree,the supersonic result(force coefficients and moment coefficients) is acceptable,but the subsonic result is far from the experimental data,who would please give me some advice on it,thanks fot regards now! k-e modle , steady, explicit multi-grid implemented inletressure-far-field outletressure out
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Old   September 16, 2004, 01:56
Default Re: how to calculate subsonic misssile
N Menon
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Your are always going to battle with the coefficients in subsonic flow expecially the Cd numbers as the solution is domintaed by the viscous terms at low AoA
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Old   September 17, 2004, 01:32
Default Re: how to calculate subsonic misssile
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sorry,i have to add here that the supersonic results are not good too,30% lower than experimental data(for lift coefficient , 10% lower).the results are probably due to the difficulty to simulate fiction drag ,how can i deal with it? isn,t fluent good at dealing with it?
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