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

Combustion and Supersonic wave propagation

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

Reply
 
LinkBack Thread Tools Display Modes
Old   April 20, 2004, 21:42
Default Combustion and Supersonic wave propagation
  #1
Arun
Guest
 
Posts: n/a
Hi all,

I am trying to simulate combustion in a one-side closed tube. The tube is initially filled with a premixed miture of fuel and air. Once ignited, a wave propagates from the closed end towards the open end. This wave is supposed to travel at Mach number greater than 3 inside the tube. I am trying to simulate the problem in FLUENT using Finite Rate volumetric reaction with standard K-Epsilon model and the interaction between chemistry and turbulence as the Eddy Dissipation model. I am able to see the wave travelling at Mach =0.69 but not more than that.

Can someone think of reasons as to why the velocity of the flame front is not increasing to mimic the actual physics?
  Reply With Quote

Old   April 22, 2004, 10:05
Default Re: Combustion and Supersonic wave propagation
  #2
cg
Guest
 
Posts: n/a
Try the coupled-explicit solver with dynamic mesh adaption to get resolution at the shock front. Use laminar chemistry, and start with turbulence off.
  Reply With Quote

Old   April 23, 2004, 11:43
Default Re: Combustion and Supersonic wave propagation
  #3
Arun
Guest
 
Posts: n/a
Okay I will try that. Thank you for your response cg.

  Reply With Quote

Old   July 23, 2010, 18:10
Default Scramjet Combustion Simulation
  #4
CPT
New Member
 
C T
Join Date: Jul 2010
Posts: 7
Rep Power: 6
CPT is on a distinguished road
Hi All,

I am trying to perform a 2-D simulation on a Scramjet Combustor and I guess the back pressure increase due to combustion is getting so high that its pushing out the oblique shock wave out of the combustor. If I decrease the back flow pressure will that solve my problem ?

Thanks,
CPT
CPT 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
A New Solver for Supersonic Combustion nakul OpenFOAM 6 March 30, 2014 03:00
A New Solver for Supersonic Combustion nakul OpenFOAM Announcements from Other Sources 18 February 19, 2013 08:48
Supersonic Combustion Andrew FLUENT 1 March 16, 2011 07:00
Supersonic combustion Roshanlal Main CFD Forum 8 March 16, 2011 06:52
2d supersonic combustion with H2 gas Roshanlal FLUENT 0 August 3, 2010 10:25


All times are GMT -4. The time now is 22:05.