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-   -   Can I use Turbogrid to mesh a wind turbine blade? (http://www.cfd-online.com/Forums/cfx/22798-can-i-use-turbogrid-mesh-wind-turbine-blade.html)

Henry Liu July 3, 2006 01:18

Can I use Turbogrid to mesh a wind turbine blade?
 
Hi, everyone:

Can I use the Turbogrid to mesh the flow field of a wind turbine blade?

I know the Turbogrid can mesh an internal flow turbomachine easily such as gas turbine and water turbine. But I'm not sure whether it can mesh an external flow rotor like wind turbine. Does anyone has some experience and give me some advice?

Thank you!


imad July 3, 2006 02:31

Re: Can I use Turbogrid to mesh a wind turbine bla
 
the shroud must be defined near the tip of blade but in the wind turbine study we need a region between tip and shroud for this we cannot use turbogrid , try icem cfd

Henry Liu July 3, 2006 03:23

Re: Can I use Turbogrid to mesh a wind turbine bla
 
Thank you! I think you are right.

longbow July 3, 2006 12:02

Re: Can I use Turbogrid to mesh a wind turbine bla
 
Maybe you make an artifical shroud. In other words, put a GGI as shroud.

imad July 3, 2006 15:22

Re: Can I use Turbogrid to mesh a wind turbine bla
 
THE TIP OF WIND TURBINE IS GENERALY NOT CIRCULAR (plan form); circular shroud is hardly find

longbow July 5, 2006 07:48

Re: Can I use Turbogrid to mesh a wind turbine bla
 
NON-CIRCULAR BLADE TIP DOES NOT PREVENT YOU USING A CIRCULAR SHROUD. Why? The only purpose of that artifical shroud is to generate mesh in Turbogrid. Wind turbine does not have a shroud. You can create any shape of shroud provided it encloses wind turbine blade. Certianly, because of non-circular tip, you will have non-constant tip clearance if you create a circular shroud. In Pre, you can treat it as a GGI surface.

imad July 5, 2006 11:27

Re: Can I use Turbogrid to mesh a wind turbine bla
 
good idea but my wind turbine for example is expressed in Cartesian coordinates for fixed span but turbogrid need coordinates at fixed radial position R not Z

longbow July 5, 2006 11:56

Re: Can I use Turbogrid to mesh a wind turbine bla
 
Converting Cartesian coordinates into cylindrical coordinates is not a big problem. The difficult part is to create blade profile in .curve format from your wind turbine geometry model.

imad July 5, 2006 13:42

Re: Can I use Turbogrid to mesh a wind turbine bla
 
No its not a problem of coordinate transformation but my wind turbine model( Nrel phase 6) is defined with plan form profiles at fixed span. in turbogrid profile.curve the profil must be defined with variable z no ? ANOTHER QUESTION. how can TRANSFORM XYZ COORDINATES TO MERIDIONAL M,THEta

thanks

RS2 November 10, 2011 05:36

hi

wind turbine blade modelling needs a NACA profiles for its profile defination wheras blademodeller of tubogrid, models the blade using curves defined by various points and angles.........my question is , is there some option in bladegen of turbo for defining blade using NACA profiles.

Thanks

D.B November 10, 2011 06:41

Hi ,

Here is a collective answer to some of the above questions,
1) GGI option for shroud can be used and has been used by ppl to simulate wind turbines using turbo-grid meshing.
2) For Blade Profile definition you just need the co-ordinates. For eg. if you want to rotate a blade about x. axis, define the airfoils in X-Y planes and vary Z co-ordinate. I myself ahve done this and my blade was twisted as well.
3) Cartesian co-ordinates are enough, no need to enter cylindrical co-ordinates.

Hope this helps,
D.B


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