CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > FLUENT

Meshing a wind turbine blade

Register Blogs Members List Search Today's Posts Mark Forums Read

Reply
 
LinkBack Thread Tools Display Modes
Old   February 2, 2016, 21:32
Default Meshing a wind turbine blade
  #1
New Member
 
numan
Join Date: Sep 2014
Posts: 18
Rep Power: 4
mrswordf1sh is on a distinguished road
Hi guys,

I am trying to validate my numerical method using NREL Phase VI blade in ANSYS FLUENT, but I am having hard times with meshing. I am using the standart meshing component of ANSYS. I just define face sizing, body sizing and infilation, I barely get 0.9 skewness having 12 M of mesh elements.

I tried different sizing and methods, but still I can't increase the mesh quality. I have attached the picture of the fluid domain and other mesh sizing details. Do you have any advice?

My power output results are arround %20 worse than experimental results.

What should be the range of Y+ for k-w SST model?

One more thing, the rotation direction of the Moving Domain inside is +z, that it true right?

Thank you.
Attached Images
File Type: png FD.png (37.2 KB, 38 views)
mrswordf1sh is offline   Reply With Quote

Old   February 4, 2016, 22:27
Default
  #2
Senior Member
 
Aja
Join Date: Nov 2013
Location: Germany
Posts: 372
Rep Power: 6
aja1345 is on a distinguished road
Value of Y+ should be equal to 1.

It seems that rotation direction of the Moving Domain is right.

Did you use structure mesh in computational domain?
aja1345 is offline   Reply With Quote

Old   February 5, 2016, 23:16
Default
  #3
New Member
 
numan
Join Date: Sep 2014
Posts: 18
Rep Power: 4
mrswordf1sh is on a distinguished road
Thanks for the response.

Nope I used unstructured mesh. Since the blade has a complex geometry, I guess it is almost impossible to use structured mesh.

Do I need to learn to use ICEM CFD or some other meshing software for meshing? It seems very difficult to get a quality mesh with ansys meshing:/

And btw, the wind turbine blade should be stationary wall and not moving wall right? I just have to rotate the moving frame?
mrswordf1sh is offline   Reply With Quote

Old   February 6, 2016, 16:21
Default
  #4
Senior Member
 
Aja
Join Date: Nov 2013
Location: Germany
Posts: 372
Rep Power: 6
aja1345 is on a distinguished road
Quote:
Originally Posted by mrswordf1sh View Post
Thanks for the response.

Nope I used unstructured mesh. Since the blade has a complex geometry, I guess it is almost impossible to use structured mesh.

Do I need to learn to use ICEM CFD or some other meshing software for meshing? It seems very difficult to get a quality mesh with ansys meshing:/

And btw, the wind turbine blade should be stationary wall and not moving wall right? I just have to rotate the moving frame?
Ok,

I use Gambit but I am agree with you about "Since the blade has a complex geometry, I guess it is almost impossible to use structured mesh"

But i had seen a few tutorial about meshing of wind turbine in Gambit. Also Did you study the following links and download them?

https://www.google.com/?gws_rd=ssl#q...2FWind+turbine

Above links are useful. there is a youtube link....

Last edited by aja1345; February 7, 2016 at 14:27.
aja1345 is offline   Reply With Quote

Old   February 9, 2016, 19:55
Default
  #5
New Member
 
numan
Join Date: Sep 2014
Posts: 18
Rep Power: 4
mrswordf1sh is on a distinguished road
thx for the responses, it helped me.

Strangely, if I use patch independent method (using tetra mesh), skewness and orthogonal quality values get much better, but mesh looks generally awfull.

So, should I still use it?
mrswordf1sh is offline   Reply With Quote

Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
3D wind turbine blade analysis mrswordf1sh FLUENT 0 April 4, 2015 20:17
Anlysing and Calculating the power output from a wind turbine blade mrswordf1sh FLUENT 0 March 9, 2015 10:27
[ANSYS Meshing] wind turbine simulation meshing problem maxwell94 ANSYS Meshing & Geometry 0 January 26, 2014 14:06
Can I use Turbogrid to mesh a wind turbine blade? Henry Liu CFX 10 November 10, 2011 06:41
Inlet Flow Velocity or pressure gradient - modeling of a Wind Turbine Blade case LittleBart Main CFD Forum 5 January 10, 2011 16:07


All times are GMT -4. The time now is 17:32.