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

Compressible flow in CFX, valve simulation

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

Reply
 
LinkBack Thread Tools Display Modes
Old   January 6, 2014, 04:56
Default Compressible flow in CFX, valve simulation
  #1
New Member
 
Ben Nicholls
Join Date: Oct 2013
Posts: 6
Rep Power: 3
bnicholls92 is on a distinguished road
I am currently performing some analysis in CFX regarding the flow through a high pressure air valve. This valve is designed to be used to prevent air leaks in the event that the airline on the valve outlet fails. I am performing this analysis with an inlet pressure of 207Bar and then I am varying the outlet pressure from 25 Bar up to 175Bar in steps of 25Bar. I am performing this analysis to make a design decision for the valve opening. So far my velocities have been sonic (>340.29m/s) at their peak and this does not feel right. However, I do not know how the density of the air is changing and would be interested in measuring this.
bnicholls92 is offline   Reply With Quote

Old   January 12, 2014, 07:20
Default
  #2
Super Moderator
 
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 10,954
Rep Power: 85
ghorrocks has a spectacular aura aboutghorrocks has a spectacular aura aboutghorrocks has a spectacular aura about
Ummmm - 207 bar in air? This is definitely going to choke and go sonic. Why do you think otherwise?
ghorrocks is offline   Reply With Quote

Old   January 13, 2014, 05:05
Default
  #3
New Member
 
Ben Nicholls
Join Date: Oct 2013
Posts: 6
Rep Power: 3
bnicholls92 is on a distinguished road
I have since found out that the system does not drop approximately 1Bar after each seismic gun fires. Instead, the system pressure at the manifold drops to approximately 75% of the line pressure after discussing this with a field service engineer. And this was shown to me using a simulated system.
bnicholls92 is offline   Reply With Quote

Old   January 13, 2014, 05:18
Default
  #4
Super Moderator
 
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 10,954
Rep Power: 85
ghorrocks has a spectacular aura aboutghorrocks has a spectacular aura aboutghorrocks has a spectacular aura about
I have no idea what you are talking about. Please post an image of what you are doing. You are going to have to explain what you are doing if you want us to help you.
ghorrocks is offline   Reply With Quote

Reply

Tags
cfx, compressible, flow, valve, valve simulation

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
Compressible flow Simulation in CFDesign krishna_msrit Autodesk Simulation CFD 1 September 9, 2012 23:00
CFX - Solidworks Flow, Impeller comparison aerospace_guy_ CFX 8 March 20, 2012 23:06
Compressible flow simulation at mach .7 mbeals FLUENT 6 April 18, 2009 10:49
Mass flow and U-Mom flow in CFX Zhihua Xie CFX 0 September 3, 2007 09:49
Control Valve Flow Simulation Ashraf Sharara FLUENT 0 March 5, 2007 06:28


All times are GMT -4. The time now is 11:57.