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

Aeroacoustics

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

Reply
 
LinkBack Thread Tools Display Modes
Old   February 14, 2006, 09:44
Default Aeroacoustics
  #1
Indy
Guest
 
Posts: n/a
Hi,

My final year project is based on simulating the radiated sound field of a low Reynolds number mach 0.75 single stream jet. The current method I'm debating to use is a LES, transient analysis to determine the near field spectrum and then using Kirchoffs surface integration to determine the far field characteristics. What I'm not sure about is the number of time steps I need to employ to catch all the emitted frequencies from both large and small scale structures. I have read that the cell size is paramount to this process. Is there a way I can calculate this with out knowing what frequencies are emitted. The program I will be using for the analysis is Ansys Workbench and CFX5.

Thanks for any advise on this matter

Indy

  Reply With Quote

Old   February 17, 2006, 16:21
Default Re: Aeroacoustics
  #2
Ian
Guest
 
Posts: n/a
Yeah, if you know the frequesncies then you'll need a few timesteps for each period. Timestep = 1/10 period should do the trick.
  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
Aeroacoustics in OpenFOAM... Bertrand OpenFOAM 7 December 7, 2010 12:22
aeroacoustics Constantinos Main CFD Forum 1 March 22, 2004 14:32
Aeroacoustics - Flow over Cylinder Axel Rohde Main CFD Forum 2 August 17, 2002 12:18
can Fluent do aeroacoustics?? jonathan FLUENT 1 February 18, 2002 07:36
Aeroacoustics jonathan FLUENT 0 February 4, 2002 00:55


All times are GMT -4. The time now is 05:41.