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

Wind tunnel corner vanes, loss coefficient

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

Reply
 
LinkBack Thread Tools Display Modes
Old   February 8, 2013, 18:41
Default Wind tunnel corner vanes, loss coefficient
  #1
New Member
 
Join Date: Jul 2012
Posts: 5
Rep Power: 4
SydBarrett11 is on a distinguished road
Hi guys,
sorry for quite a silly and long question.

Recently, I have solved an 90 elbow, with corner vanes in it, and I would like to get a loss coefficient of that elbow.
inlet: velociy inlet, outlet: outflow, walls: with roughness specified

Loss coeficient is defined as K=(p_in-p_out)/dynamic_presure

How do I get the pressure drop? So should I substract outlet pressure value from inlet pressure value? Static or total? Is that so simple?

static pressure in= -23Pa
total pressure in = 792Pa
static pressure out = -149Pa
total pressure out = 667Pa

Pressure drop in both cases (static and total) 126Pa??? Is that right? (are these values the same, only because the velocity throught vanes almost didn't change?)

A what about operating pressure? Is it important when counting pressure drop? I set operation pressure 101325Pa a placed its coordinates out of geometry, but when I change the coordinates, pressure values changes but the difference remains the same.

Thanks
Attached Images
File Type: jpg ada.jpg (50.6 KB, 4 views)
SydBarrett11 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
Wind tunnel lift coefficient DoHander Main CFD Forum 2 August 13, 2010 09:28
how to consider perforated wind tunnel wall in CFD simulation littlelz CFX 4 June 11, 2009 05:51
Wind Tunnel Testing Francesco Nicolosi Main CFD Forum 0 November 25, 2008 13:55
Virtual Wind Tunnel in FLUENT ND FLUENT 0 April 7, 2006 07:43
Wind tunnel modeling Pandu CFX 3 May 19, 2003 21:49


All times are GMT -4. The time now is 09:08.