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Query on Aerodynamic Forces/Moments Directions
Dear all,
I’m trying to perform co-simulation between QBlade and other software whereby aerodynamic forces/moments from the rotor is transferred to another software, but I am unsure about the coordinate system that the aerodynamic forces/moments are reported in. My doubts are as follows:
- What is the reference coordinate system for “Aerodynamic Thrust” & “Aerodynamic Torque”?
- Is “Aerodynamic Force/Moment in Hub X_g/Y_g/Z_g Direction” reported with respect to the global axis?
My doubts arise when I try to perform simulation of 2 similar turbines in which the orientation of the turbine and the inflow wind is rotated by 180°. I was expecting that the “Aerodynamic Moment in Hub X_g Direction” would be reversed as the rotor is rotating in opposite direction with respect to global coordinate system. However, the simulations seem to be reporting the same Aerodynamic Moment. Simulation files are attached for reference.
Thanks in advance!
Regards,
Andhi
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Hi Andhi,
thats a typo in the variable name. It should be Aerodynamic Force/Moment in Hub X_h/Y_h/Z_h, which is the local fixed hub coordinate system. This system is attached to the turbine, so it rotates with it.
The variable name is fixed now…
Best regards,
David
