Dear members of our group, I'm back with the Cp and Cm for cross- flow turbines and multiblade propeller. The results use as a variable the tip speed ratio. Cp=power coefficient;Cm=torque coefficient multiblade propeller Cm(0)=0.45;Cm(1)=0.3;Cm(1.7321)=0 Cp(0)=0;Cp(1)=0.3;Cp(1.7321)=0 classical Savonius Cm(0)=0.2(7);Cm(0.3)=0.(296);Cm(0.9)=0.(2);Cm(1.5)=0 Cp(0)=0;Cp(0.9)=0.2;Cp(1.5)=0 constructal Savonius Cm(0)=0.(6);Cm(0.9)=0.(3);Cm(1.8)=0 Cp(0)=0;Cp(0.9)=0.3;Cp(1.8)=0 classical Darrieus Cm(0)=0;Cm(2q/3)=32Cp/27q;Cm(q)=Cp/q;Cm(4q/3)=16Cp/27q;Cm(2q)=0 Cp(0)=0;Cp(q)=0.4;Cp(2q)=0 q=2.5......6=tip speed ratio constructal Darrieus Cm(0)>0 self starting turbine mixed Darrieus-Savonius Cm(0)=Cm(2.5)=0.09;Cm(0.4514)=0.23;Cm(5)=0 for tip speed ratio=2.5 I'm still working to obtain the equations for the Gorlov turbine and the Cycloturbine. If the group will be interested into my results I'll be back again with the equations for a constructal hydrofoil (based on the fish body) wich has the minimum friction drag coefficient. By the way, the equation can be used for obtaining minimum friction drag coefficient for missile noses, ogives and all kind of dirty bullets. Best regards Constantin Doinel Ungureanu
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