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

Temp. and Pressure aft combustion

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

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   October 20, 2017, 00:50
Default Temp. and Pressure aft combustion
  #1
New Member
 
Myoungjin Kim
Join Date: Oct 2017
Posts: 1
Rep Power: 0
Comb3112 is on a distinguished road
hi

I'm using nasa cea program(GUI ver) for rocket problem.
In my lab, I'm designing the rocket nozzle, with Al and air under 2Bar atmosphere.

Commonsensically, after combustion, the pressure and temperature would rise. and these value will contribute to the nozzle design parameter such as P0 and T0(the subscript 0 means total properties).

However, if i run the CEA code with given initial pressure(2Bar), the output shows same pressure value, 2Bar. and the error shows that - WARNING!! CALCULATIONS WERE STOPPED BECAUSE NEXT POINT IS MORE THAN 50 K BELOW THE TEMPERATURE RANGE OF A CONDENSED SPECIES (ROCKET) -

If i change the reactant to O2(gaseous species), there are no error messages but the pressure value shows same.

I cant understand why the pressure output after combustion shows the same value.
How can I get the pressure value after combustion?
Attached Files
File Type: txt Al and O2.txt (8.1 KB, 2 views)
File Type: txt Al and Air.txt (11.5 KB, 1 views)
Comb3112 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
Pressure Driven Supersonic Flow in Converging-Diverging Nozzle cdm OpenFOAM Running, Solving & CFD 7 August 28, 2019 01:37
Pressure loss Velocity coupling CFXMUFFIN CFX 1 February 6, 2016 04:43
Gasoline Vapor pressure at 60 deg Temp saravana CFX 1 January 22, 2012 06:29
Temp & Pressure jump at&near wall during iteration dokeun FLUENT 1 April 19, 2011 02:04
Simple Temp and Pressure Q Cb Siemens 4 February 21, 2005 02:58


All times are GMT -4. The time now is 01:45.