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-   -   What's the meaning of Cm (moment coefficient)? (http://www.cfd-online.com/Forums/fluent/39044-whats-meaning-cm-moment-coefficient.html)

 Pathway December 26, 2005 04:54

What's the meaning of Cm (moment coefficient)?

I research the wind turbine and use Fluent to simulate problems. I want to know the moment of wind turbine and Fluent can report Cm. Therefore I don't know the meanings of Cm definitely. I had found all the PDF files of Fluent, but I can't find the meanings of Cm (moment coefficient)? I not only want to know the physical meanings of Cm but also its mathematics' equation. Thank you so much!

 sharuk January 5, 2006 13:11

Re: What's the meaning of Cm (moment coefficient)?

it's good i find someone working on the same area, the moment which fluent refers is the torque coeffcient of the rotor,

 Pathway January 6, 2006 00:31

Re: What's the meaning of Cm (moment coefficient)?

Thank you for your response. And I want to know where you find this relationship. What the relationship between Cm and torgue? Sincerely.

 sharuk January 6, 2006 00:41

Re: What's the meaning of Cm (moment coefficient)?

if u've any idea about ur generator torque and blade inertia, then u can find the rpm of the ur rotor at desired TSR, so giving same inputs to fluent, the aerodynamic moment of ur rotor/blade u get is equal to ur torque.

 Pathway January 6, 2006 00:50

Re: What's the meaning of Cm (moment coefficient)?

Thank you so much. And I will try the method you said.

 Bunmi January 6, 2006 03:45

Re: What's the meaning of Cm (moment coefficient)?

Cm is the convergence history of your moment

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