CFD Online Logo CFD Online URL
Home > Forums > FLUENT

Aeroacoustic signals off by 20-30db compared to experimental data

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

LinkBack Thread Tools Display Modes
Old   August 6, 2013, 18:15
Default Aeroacoustic signals off by 20-30db compared to experimental data
New Member
Join Date: Apr 2012
Location: Warsaw, Poland
Posts: 8
Rep Power: 7
zbyhu is on a distinguished road
I am doing a noise simulation of an isolated airfoil, and when I looked at the results today they seem to be off by 20-30db. By character the plots are the same for experimental and cfd data, just offset. Do you know if there is something I might be forgetting about that is causing this?

Also it looks like the signals calculated in Fluent have to be A-weighted before being compared with microphone data, is that right?

I've uploaded some plots for reference here:
(the ones where the SPL is higher are from the experiment)

edit: And here are all on one: experiment, simulation, simulation after a-weighting, and with +30dB.

Last edited by zbyhu; August 6, 2013 at 19:48.
zbyhu is offline   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
Step Changes in Roughness Experimental Data syler3321 Main CFD Forum 0 October 20, 2010 00:45
Functions to import non grid associated experimental data benk OpenFOAM 1 June 30, 2010 05:11
fan vs experimental data ijk CFX 2 June 7, 2010 04:42
Multiphase experimental data James McLaren Main CFD Forum 1 September 14, 1998 06:35
Finding Experimental Data Mattias Jaran Main CFD Forum 0 August 10, 1998 07:35

All times are GMT -4. The time now is 03:17.