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

nozzle

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

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   February 11, 2008, 21:06
Default nozzle
  #1
Shuo
Guest
 
Posts: n/a
I am modelling a supersonic jet issued from a convergent nozzle. So far the computational domain is a box. Is there any advantages of including the nozzle profile as well?

Shuo
  Reply With Quote

Old   February 12, 2008, 10:20
Default Re: nozzle
  #2
ag
Guest
 
Posts: n/a
If the et is supersonic, then no signals can propagate back upstream. So if you have the correct nozzle exhaust, then I would think you should be good to go. Note that this only applies for a supersonic exit at the nozzle.
  Reply With Quote

Old   February 12, 2008, 10:21
Default Re: nozzle
  #3
ag
Guest
 
Posts: n/a
That should read "If the exhaust is supersonic ..."
  Reply With Quote

Old   February 12, 2008, 23:34
Default Re: nozzle
  #4
Shuo
Guest
 
Posts: n/a
My nozzle exit can be either supersonic/sonic. So it's still good for sonic condition?

Shuo
  Reply With Quote

Old   February 13, 2008, 09:54
Default Re: nozzle
  #5
ag
Guest
 
Posts: n/a
As long as the nozzle exit Mach number is greater than one then signals can't travel back upstream. If you have a converging-diverging nozzle then you'll have a hard time getting M=1 at the nozzle exit (nozzles don't work like that). So in that case you would need to model the nozzle itself. The only way to have a sonic condition at the exit is if you have a converging only nozzle. In that case, the sonic flow at the throat would be sufficient to ensure no signal propagation back upstream, as long as the throat remains choked.
  Reply With Quote

Old   February 13, 2008, 17:55
Default Re: nozzle
  #6
shuo
Guest
 
Posts: n/a
Thnaks ag
  Reply With Quote

Old   February 19, 2008, 14:57
Default Re: nozzle
  #7
Joe
Guest
 
Posts: n/a
What type of analysis are you doing? What type of information are you looking for. In general modeling the nozzle is a good idea. A velocity profile at a nozzle exit is not the idealized profile you are probably specifying.
  Reply With Quote

Old   February 19, 2008, 19:34
Default Re: nozzle
  #8
Shuo
Guest
 
Posts: n/a
I am simulating a supersonic impinging jet. I was hoping to simplify the grid and coding by excluding the nozzle countour.

Shuo
  Reply With Quote

Old   March 7, 2011, 01:36
Default coding for supersonic 3d nozzle
  #9
New Member
 
DINESH KUMAR.T
Join Date: Mar 2011
Posts: 3
Rep Power: 15
dineshastronaut is on a distinguished road
Hi,

Does anybody have a Matlab code for MOC contour design of an axisymmetric supersonic (Mach 2) nozzle they could send me @

dinesh_astronaut@yahoo.co.in

Thanks in advance,
DINESH
dineshastronaut is offline   Reply With Quote

Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
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 Off
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Convergent Divergent Nozzle Hrishikesh Main CFD Forum 12 June 25, 2016 03:06
Nozzle Flow - Divergence Problem Ijaz FLUENT 9 January 11, 2014 05:36
C-D nozzle supersonic jet boundary Gland FLUENT 4 May 24, 2012 01:25
Flow simulation in a Pelton turbine nozzle fivos FLUENT 0 April 19, 2011 12:46
compressible flow in a counterflow nozzle d.vamsidhar FLUENT 0 November 24, 2005 02:45


All times are GMT -4. The time now is 20:09.