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why torque is half than expected?

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Old   November 10, 2009, 05:09
Default why torque is half than expected?
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Dear All,

I need to calculate power coeff. so I ask FLUENT to print me moment. I use this moment to calculate power coeff. in this way;

P=T*W where T:torque (moment that I can get from FLUENT), W:rot. speed [rad/s]

CP=p/(1/2*rho*A*U^3) where rho:density, A:area, U:freestream vel

But the CP that I calculate in this way is the half of the CP that I calculate analytically...

If someone knows sth about this I will be glad.


Last edited by bakay; November 16, 2009 at 07:03.
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