CFD Online Logo CFD Online URL
Home > Forums > CFX

Axial Compressor CFD-Help needed

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

LinkBack Thread Tools Display Modes
Old   April 29, 2008, 09:06
Default Axial Compressor CFD-Help needed
Posts: n/a
Dear All,

I have no prior experience of periodic simulations. As Axial Compressors have more than 30 blades in a single rotor plus it requires Guide vanes,Stator means for a 360 deg case it will have more than 100 blades in a single stage.Thus mesh gets too huge.

So one must do periodic simulation.But with different No.of blades in stator,rotor & Guide Vanes can we analyse a single stage using Rotational Periodicty?(since for a frozon rotor interface areas doesnt match)

I am trying it,but solver gets overflow.I m stuck with the situation.Can anybody pull me out of this situation.

Thanks for your precious time.

  Reply With Quote

Old   April 29, 2008, 13:29
Default Re: Axial Compressor CFD-Help needed
Posts: n/a
How many blades are on each component and how do they align?

In order for there to be periodicity, the numbers of all the features around the axis must share a common factor. For instance, if you have 32 blades on your rotor and 7 guide vanes, your geometry won't be periodic regardless of the orientation of the rotor. If any component does not exhibit periodicity, then the geometry as a whole does not.

I understand the frustration as I am currently working with a simulation that would be 1/4 symmetric, except for one feature that exists in only 1 quadrant. As a result I can not use any symmetry on my geometry containing over 3,000 surfaces so my mesh contains over 20,000,000 cells.
  Reply With Quote


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
axial and z-velocity difference? user0314 FLUENT 1 May 27, 2016 12:30
Axial Compressor experts needed.... arunraj CFX 5 August 17, 2011 19:21
how to plot out circumferentially mass averaged axial velocity in a rotor? wildli FLUENT 0 July 17, 2010 15:54
Model Axial Fan Chien-Chi Chao Siemens 1 February 1, 2001 23:13
About the design of axial fans HanCheolHeui Main CFD Forum 0 September 8, 1998 10:13

All times are GMT -4. The time now is 12:16.