|January 6, 2014, 17:18||
Nozzle of turbojet engine
Join Date: Jan 2014
Posts: 3Rep Power: 3
I want to count the heat exchange in the nozzle of turbojet engine. I've created a model of this engine and I used following settings:
This is only 1/4 of model.
Viscous: standard k-E
- pressure inlet: gauge pressure=203990.4 Pa and Temp=1000 K, operating conditions -> pressure=0 Pa
- pressure outlet: gauge pressure=472655.75 Pa and temp=890 K
- symmetry for every wall 'inside'
- wall for outer surface: convection with heat transfer coefficient 58 w/m2-k , free stream temperature=220 K and wall thickness=1 mm
Reference values: compute from: pressure inlet
Flux type: AUSM
Solution Initialization: compute from: pressure inlet
What do you think about that? I've had some troubles and errors like 'backflow' , "time step reduced...' , divergence...
|January 7, 2014, 04:35||
Join Date: May 2010
Posts: 130Rep Power: 7
|January 19, 2014, 19:14||
Join Date: Jul 2009
Location: Cincinnati, OH
Posts: 41Rep Power: 7
You could also try pressure based solver. Also try k-w or sst models for turbulence. k-e is more suitable for external flows. double check your mesh and make sure there is no problem with the mesh. Use SIMPLEC.
|January 20, 2014, 09:19||
Join Date: Aug 2012
Posts: 4Rep Power: 4
I didnt understend conditions at outlet. dont u talk about nozzle to air outlet?
if it's like that condition should be like; presure 0 pa and temp 280-290 K.
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