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Head (m) as in put parametrer

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Old   January 1, 2014, 01:14
Unhappy Head (m) as in put parametrer
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Oblique Shrestha
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How to input head (m) as a input parameter??? I have tried using this constant mass flow rate in different guide vane angles but the result of head head varies from 750 m to 12 m which in my veiw no possible.


My script is


LIBRARY:
CEL:
EXPRESSIONS:
Accumulated Time Step = 100
Angular Velocity = 529 [rev min^-1]
Current Time Step = 100
H net = Hin -Hout
Head = Total Pressure in Stn Frame/gama
Hin = massFlowAve(Head )@Inlet
Hout = massFlowAve(Head )@Outlet
Hydraulic power = gama *Q *H net
Q = massFlow()@Inlet /massFlowAve(Density)@Inlet
Reference Pressure = 1 [atm]
Sequence Step = 100
Time = 0 [s]
atstep = Accumulated Time Step
ctstep = Current Time Step
efficiency = (shaft power /Hydraulic power )*100
gama = 9806 [N*m^-3]
omega = Angular Velocity
shaft power = (torque_x()@Rotating Default )*(omega*2*pi/(360[degree]))
sstep = Sequence Step
t = Time
END
END
END

Please help me with this matter
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Old   January 1, 2014, 05:22
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Glenn Horrocks
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WHy not just define the inlet as a total pressure boundary and the outlet as a pressure boundary? Then you simply define the pressure loss over the system. Read the documentation section on "Choice of boundary conditions" for further details.
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