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Should I consider compressibility in fan simulation?

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Old   May 20, 2011, 11:28
Default Should I consider compressibility in fan simulation?
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Hi all,

The fan has a diameter of about 0.8m and speed at 3000rpm. I want to get the fan power, static pressure rise across the fan, and fan efficiency. Should I use compressible flow or incompressible flow? How much difference will that make?

Thanks a lot,

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Old   May 21, 2011, 07:56
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Glenn Horrocks
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Why not run both and find out for yourself?

But in general when the Mach number is under 0.3 the difference between compressible and incompressible flow is under 1%.
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compressibility, fan simulation

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