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How to get the distance from an unknown point and an axis? |
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July 21, 2015, 06:55 |
How to get the distance from an unknown point and an axis?
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#1 |
New Member
Felix
Join Date: Apr 2015
Location: GER
Posts: 9
Rep Power: 11 |
Hi there. Im pretty new here but just read much the last couples of months, now I have a prob.
I have a domain with a blade of a Windturbine. I want to calculate the torque which is the result of the force at the bladesurface and the distance to the pitch axis. For the distance (actually the moment arm), I need the point where the integral pressure stresses the blade, so how can I get this point to use it in an expression? If I could find this anywhere in the Forum, you guys maybe give me a hint and apologize. Thanks! |
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July 21, 2015, 07:24 |
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#2 |
Super Moderator
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 17,867
Rep Power: 144 |
Have a look at the equations which define centre of pressure. CFX has a wide range of integration functions in the CEL, so you should be able to adapt the CEL to the equation you require.
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July 22, 2015, 11:18 |
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#3 |
New Member
Felix
Join Date: Apr 2015
Location: GER
Posts: 9
Rep Power: 11 |
Alright, thanks mate, I think I'll find a solution, maybe I tried it to complicated and just have to use the torque functions in the right way.
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July 22, 2015, 13:04 |
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#4 |
Senior Member
Edmund Singer P.E.
Join Date: Aug 2010
Location: Minneapolis, MN
Posts: 511
Rep Power: 21 |
Yes, why are you doing it that way? Put a coord system at the point of blade rotation and get the torques around it.
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July 23, 2015, 10:21 |
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#5 |
New Member
Felix
Join Date: Apr 2015
Location: GER
Posts: 9
Rep Power: 11 |
Got it, sorry :/ ... aaaaand: THX!
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Tags |
axis, distance calculator, integral pressure, point |
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