About Rotating Reference Frame (RRF)in CFX
Hi,everybody
I'm dealing with a wind turbine rotating simulation. Now I have some uncerten things about RRF need ask. Some info about this simulation list below: in coming wind speed : 10m/s along Y-axis Rotating domain: +320rpm about Y-axis, it's clockwise rotation if you observe in front of whole turbine (inclued nose corn, two blades only and a short cylinder that represente the linkage between the rotor and nacelle) Stationary domain : include nacelle and tower. 3 split interfaces enclose rotor. I have performed the steady state simulation, I slice the blade and view the fluid velocity around the airfoil,I found fluid come frome the trailing edge to leading edge which is oppsite the physical condistion. so I decide use -320rpm for rotaing domain, and do a transient simulation and make an animation, however in this animation the blade is rotating in anti-clockwise which it is not true in physics. So I'd like to know, for the rotating domain should use the same angular velocity as the blades or reversed angular velocity? |
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