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 sharuk July 12, 2005 13:19

i've a doubt regarding analysis of wind turbine blades in fluent, do we need to model the blade with the twist or it should be straight to get same AOA over the whole span,which one is correct, i'm using periodic boundaries on either side ,inlet, outlet and a wall on top, do we need to give rotating reference. thanx in advance sharukdear@gmail.com

 Mani July 16, 2005 13:14

Re: analysis of wind turbine blades

Just think about it: Assuming uniform wind velocity, the incoming axial velocity component is independent of the radius. However, the circumferential component of the relative velocity varies linearly in span direction, because of rotation.

There is no way to get the same AOA over the whole span on a straight blade.

>i'm using periodic boundaries on either side ,inlet,
:outlet and a wall on top

What do you mean by 'top' ??

 sharuk July 16, 2005 14:40

Re: analysis of wind turbine blades

i'm using wall condition insted of farfield, is it correct, i was not getting through the periodic boundary condition so i've meshed for full model, how can i get the rotational velocity of the rotor in fluent, the blade section at tip will be a bluff body initially, so, how much rps i've to give, is it relative or absolute rotating frame, thank u

 sivarama1 April 24, 2009 05:23

Windrotor simulation in cfd

Hi,
Hi, everyone:

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

I know the Turbogrid and ICEM 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!

 sivarama1 June 22, 2009 06:45

3Dwind turbine rotor_cfx-11_error

Hi all,

FATAL ERROR : |
| |
| Initial values are required for all variables in TRANSIENT runs. |
| In this simulation, no initial value was set for |
| |
| Variable : Pressure |
| Domain : rotordisc |
| |
| The value can be set using the Initial Values panel in CFX Pre. |
| |
| To bypass this message and use default solver initial values, |
| set the expert parameter "transient initialisation override = t"

 saini.yashwant April 20, 2010 05:20

power out put

Quote:
 Originally Posted by sivarama1 (Post 214031) Hi, Hi, everyone: Can I use the Turbogrid to mesh the flow field of a wind turbine blade? I know the Turbogrid and ICEM 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!
sir can u help me to get the wind turbine analysis with fluent for boundary condition and calculating power

 sivarama1 April 20, 2010 05:25

Hi

In Turbogrid software willl use onlt internal flow problam,
actually wind turbine blade External flow problem. Here there is no domain,

My skype Id:sivaramakrishnaiah1