Gunnaras Posted November 23, 2011 Posted November 23, 2011 so i have this windmill specs for single wing L=40 meters B=4 meters Area of wing is 80 m2 what equations will i need for figuring out how fast it will turn at a given airspeed?
Latex Posted November 23, 2011 Posted November 23, 2011 You might need moments and/or some mechanics style related equations. Oh and you may also need to use angular momentum style equations.
Gunnaras Posted November 23, 2011 Author Posted November 23, 2011 yeahh that i,m aware of .. i have a wind force pushing a plane (easy) but suddenly i have a wing .. that i can also calculate .BUT wind make the wing turn side ways... how do i figure this one out
Gunnaras Posted November 24, 2011 Author Posted November 24, 2011 Okay so, now i have figured out the force the air is pushing against the wing. But now i need to figure out how much of that force will be converted into circular force? So far i have calculated a wing area of 40 squere meters wing angle is 45 degrees and the force is 1960N I i,m awar of that i need vector calculus.. But i dont know from where to aproach it. Plzz help
Schrödinger's hat Posted November 26, 2011 Posted November 26, 2011 Hmm, I'd wager that it's going to be more complicated than all that Probably involving lift ratios and stall speed and a number of other things I haven't really thought about enough to give you a good answer. These factors will probably depend heavily on geometry, as well. One way of getting an answer simply might be to use a top down approach. Start with energy. Find some efficiency figures for basic windmills (probably around 10% as a good ballpark unless it's a high performance design). Then find the kinetic energy contained in the air. That'll give you the max rotation rate for a given torque and wind-speed (the combination of friction and energy going to your generator). Maybe you could describe what you are trying to achieve and a bit more about the situation, then we could possibly be of more use. 1
Gunnaras Posted November 26, 2011 Author Posted November 26, 2011 Okay asume you have a plane witch is tilted 45 degrees. The force is 1960 neuton for the whole area so i have a forward force but i just cant figure out how much force would push it downwards... Lemme ulpload a picture of the idea
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