Hello everyone I am simulating a wind turbine using SolidWorks Flow Simulation at certain wind speeds and wanted to find the value of moment to find Power. I wanted to know the direction of moment (surface goals in x,y,z direction) acting on the turbine if the air is coming from z direction.
Please help!!!!!!!!!!!!!!!
You also need to choose a coordinate system about which the moments will be summed/resolved. For a rotor, the rotor center is the obvious location if rotor torque is desired.
I disagree with the other poster on using the global goal. While it might work in some cases where only the geometry of interest is modeled (entire aircraft, only the WECS rotor). For the general problem, only the forces from surfaces you select, when properly done will provide a reliable result.
For the general wind turbine problem, exclusion of the tower, the nacelles, and the ground is the rigorous way to go. It is understood that for a simple problem their contribution to rotor torque will be small. If complications are introduced (yaw angles, uneven terrain, transient effects like planetary b'layer or other inflow turbulence, etc), your estimates can go in the ditch pretty quick.
Never done studies on Wind Turbine so yeah, must be better to go with surface goals due to other effects.
Hi,
To calculate the moment, you can choose every surface relative to the rotor part, and select the moment in direction z.
Though I would have done differently, with a global goal, even if it's including the bottom part of the wind turbine ; so you can compare both values if they're significantly different.
To have to the sign of the moment (the direction) you can use the right-hand rule.
Hope it helps.