Nozzle of turbojet engine
Hello,
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: http://wrzucaj.net/tHjhttp://wrzucaj.net/tHjhttp://wrzucaj.net/tHj This is only 1/4 of model. Solver: density-based Energy: ON Viscous: standard k-E Air: Ideal-gas Boundary conditions: - 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... |
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Because it is a convergent nozzle. I have written about exhaust nozzle.
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Could anyone help? How to model this kind of flow?
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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.
good luck |
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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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