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3D simulation of vertical axis helical turbine

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Old   August 12, 2015, 01:43
Default 3D simulation of vertical axis helical turbine
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TKP
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Presently I am doing 3d transient simulation on vertical axis helical water turbine. But I am getting NEGATIVE Cm value. please help me out. Again I am calculating Cm from the mean Cm at different time steps that has been saved in txt. format.
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Old   August 21, 2015, 06:03
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Quote:
Originally Posted by TKP View Post
Presently I am doing 3d transient simulation on vertical axis helical water turbine. But I am getting NEGATIVE Cm value. please help me out. Again I am calculating Cm from the mean Cm at different time steps that has been saved in txt. format.
Hi

please check your vector direction in post processing the torque coefficient
also turbulence model is very importance in VAWT
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