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January 28, 2010, 12:26 |
CFX overpredicting turbine massflow
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#1 |
Member
Sherif Kadry
Join Date: May 2009
Posts: 38
Rep Power: 16 |
I have been modeling a 2 stage axial turbine, and basing my Total Pressure inlet boundary condition and static pressure exit condition based on my experimental results. The turbulence model used is SST, and its a steady state case that's being run. I notice that at all shaft speeds the massflow is overpredicted by 5%. However, total-to-static efficiencies are within 0.5%. What could be the reason for the overprediction? Here is an image of my
model: http://i615.photobucket.com/albums/t...Screenshot.png Any expert opinions would be helpful thanks. |
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cfx massflow turbo |
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