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propeller'performance
Hi,David
I meet some problems,
First,after BEM analysis,i find the propeller’s efficience is very low (max efficence is only 0.4,2000rpm,freestream speed 80m/s),I have tried to change the airfoil,but the result didn’t changed.
Second,I want to confirm the definition of Cp and Ct,is Cp equal to P/(ρ.n^3.D^5),is Ct equal to T/(ρ.n^2.D^4)? n=rpm/60,D is diameter of propeller.
After turbine simulation, i found the result of Cp ,Ct are too big
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Hi mozha,
the PROP BEM was validated with the NACA TR594 propeller geometry. Measurements can be found in this report:
https://ntrs.nasa.gov/api/citations/19930091669/downloads/19930091669.pdf
You can find the project file for his propeller (NACA_TR594_Propeller.qpr) in the /SampleProjects folder of the QBlade directory.
Regarding the definition of Cp and Ct in the turbine simulation module: these are defined after the standard conventions used in wind turbine aerodynamics.
BR,
David
