Thanks for your opinion, sir. My airfoil are symmetrical about the horizontal axis, the picture just shows only half. Sorry, my English is not very good. If the above formula does not apply in this case. Can I use other factors to calculate rotational speed with the existing unload rotational speed?
Hello everyone, i have a question, how to find wind turbine rotor rotation speed based on freewheel rotation speed of rotor (RPM)(torque = 0)? Thanks for your attention.