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Calculation of power in CFD Post for a radial turbine |
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Anton
Join Date: Oct 2015
Posts: 13
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Hi all,
I am calculating a radial turbine. Two methods for that are 1) torque@Blade * omega (built in Ansys-macro) 2) through enthalpy massFlowInt(Total Enthalpy in Stn Frame)@ BeforeWheel * NumOfSegments1 - massFlowInt(Total Enthalpy in Stn Frame)@ BehindWheel * NumOfSegments2 For axial compressors and turbines both formulas give coincident results. But for radial - no. At the moment I get like 2 times difference between them and I cant figure out why? In my case I have a Blade and Splitter as one surface defined in CFX and 8+8 Blades alltogether. It looks like 1-st formula gives more real value (10 kW vs 20 kW for Enthalpy-Power). Are there other things I have to keep in mind when calculating power for radial turbines? Is there other way to calculate power to compare it with upper two? Thanks. |
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