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why the torque is so big?

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Old   June 7, 2010, 11:13
Default why the torque is so big?
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tom
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Hi all,
I am doing a wind turbine simulation and the tested wind turbine is 20 kw, untwisted rotor sized at a diameter of 10.1m and constant chord length is 0.458m. MRF and sliding mesh both were used in my model, viscous model is standard k-e, rotational speed is 72 rpm, and I don't know why the torque imported from fluent is so big, the final output power is over 100 kw. does somebody can tell me what is the main problem may cause that issue. By the way, I do not adjust the reference value, the default value of area is 1, does the reference value may influence the simulated result? hope someone can help me get through it.
Thank you
Han
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Old   June 9, 2010, 02:40
Default Did you change the reference values??
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Reference values do have the influence for calculation like aerodynamic coefficients and moment as it is used for dynamic force calculation.. Did u check it?
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Old   June 9, 2010, 06:54
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Quote:
Originally Posted by itsayapan View Post
Reference values do have the influence for calculation like aerodynamic coefficients and moment as it is used for dynamic force calculation.. Did u check it?
Hi itsayapan,
Thank you for your reply, I don't know how to adjust the reference value, does the area option inslide reference value can be calculated by using report-projected area? and how to set up the length option insiede reference value?
Thank you
Han
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