I have a question on Cp in the wind turbine. I have calculated the moment in the z-axis as my rotor also rotors along the z-axis. I got the moment values from my simulation. I applied the procedure which ansys recommended formula (P= torque x rotational velocity) for extracting power from the turbine. I got huge discrepancies between actual and theoretical. After calculating power, I have calculated Cp it comes around 0.8 to 1, but the Betz limit is 0.59. plz help me to calculate the Cp.
Conditions :
Turbine Aera =17.5 m2
R=3.5m
V=3
omega=2.14 rad/s
TSR=2
Fluid water (990 is the density)
1. Which turbine type? Darrieus or Savonius?
2. Type of analysis: 2D or 3D
The vertical axis turbine is a drag turbine. This means that the power has two components. So you need to add the drag component to power calculations.
Dear Rajasekarababu Kb
what is this V=3 and & Fluid water (990 is the density) .
Have you completed the analysis in Ansys CFD .
if it is done in ansys fluent =Cp= (T*omega)/(0.5*air density*V3*DH)
TORQUE IS THE RESULTANT OF ALL THE BLADES FROM ANSYS .
DH = SWEPT AREA OF TURBINE (m2)
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