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-   -   Stn frame and radial velocity component in NREL (http://www.cfd-online.com/Forums/cfx/93691-stn-frame-radial-velocity-component-nrel.html)

mohammad October 24, 2011 05:00

Stn frame and radial velocity component in NREL
 
Dear all,
I have simulated a NREL wind turbine and run it with CFX.
The rotational axis and the wind direction along y but the vector of rotation is "-Y". Also, the blade is along Z axis. the domain is rotating by -72 rpm.

I want to know how i can get the value radial component of the velocity on the blade surface.
"Velocity W" or "Velocity in Stn Frame W" ???/
and generally what is meaning of Stn Frame ????


tnx

Graham81 October 25, 2011 10:13

Stn stands for stationary, this would be the absolute velocity. The other is relative to your rotating coordinate system, ie to that minus r \cdot \omega


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