CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > ANSYS Meshing & Geometry

[ICEM] Blocking advice for periodic cascade.

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

Reply
 
LinkBack Thread Tools Display Modes
Old   October 20, 2010, 22:40
Default Blocking advice for periodic cascade.
  #1
New Member
 
Jordan
Join Date: Jun 2009
Posts: 4
Rep Power: 8
jordan is on a distinguished road
I am currently involved in a research project investigating the effects of repairs on nozzle guide vanes in gas turbine engines. We are performing experiments in our transonic cascade and also trying to simulate the flow with CFX. The cascade is a linear cascade of blades so I am trying to build a two dimensional, periodic hex mesh with ICEM. The flow is transonic and we have schlieren images that demonstrate the presence of a strong shock in the flow just after the trailing edge, this shock of course interacts with the vane above where it strikes the suction surface at about mid chord.

As this is my first serious attempt at meshing such a domain, I am hoping to receive some feedback regarding my meshing approach and perhaps some pointers for improving my mesh. I have managed to get good results with the blocking shown; however, I am forced to use a mesh with a very fine density in regions that I know I don't need it because of the periodicity. Does anybody know a way around this? I also need resolution normal to the blade surface in the region near the shock, but I don't need it through the entire domain. Increasing the resolution in this direction results in a much larger number of nodes than I need.

The images I have attached show my blocking and the geometry. The inlet and outlet are both parallel to the pitch line of the translationally periodic geometry. The airfoil geometry shown is simply representative, I am not able to share the actual geometry of the vane.

I look forward to any feedback that anyone might have. Thanks.
Attached Images
File Type: jpg blocking.jpg (32.5 KB, 59 views)
File Type: jpg geometry.jpg (20.6 KB, 45 views)
Attached Files
File Type: zip sample.zip (14.5 KB, 11 views)
jordan 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
[ICEM] C-Mesh, Blocking works, but export and import (to CFX) does not Karatix ANSYS Meshing & Geometry 15 August 14, 2013 00:37
[ICEM] Blocking and Symmetry BrolY ANSYS Meshing & Geometry 32 August 24, 2012 03:13
[ICEM] Blocking strategy BrolY ANSYS Meshing & Geometry 0 July 22, 2010 04:46
2d cascade validation case Eddy CFD-Wiki 0 December 21, 2007 00:24
Mesh is created in blocking Severin CFX 3 September 18, 2007 09:02


All times are GMT -4. The time now is 10:34.