What is the elemental torque (DI, N-m) per unit length D(r/R)=1.0 for a three-bladed 30 m radius axial wind turbine at a radial location =13 m? Let the tip-speed ratio J=6 5, wind speed upstream 7.5 m/s, the chord length 1.25 m. Take the axial induction factor 0.018 and the tangential induction factor 0.005, and the flow angle 15 degrees, and the air density 1.2 kg/m3. Lift coefficient is 0.81. Drag coefficient = 0.0 Select one Oa elemental torque 198475.10 N-m Ob elemental torque 92897.67 N-m Oc elemental torque 45417.83 N-m Od elemental torque 165147 19 N-m Oe elemental torque 138892 80 N-m

What is the elemental torque (DI, N-m) per unit length D(r/R)=1.0 for a three-bladed 30 m radius axial wind turbine at a radial location =13 m? Let the tip-speed ratio J=6 5, wind speed upstream 7.5 m/s, the chord length 1.25 m. Take the axial induction factor 0.018 and the tangential induction factor 0.005, and the flow angle 15 degrees, and the air density 1.2 kg/m3. Lift coefficient is 0.81. Drag coefficient = 0.0 Select one Oa elemental torque 198475.10 N-m Ob elemental torque 92897.67 N-m Oc elemental torque 45417.83 N-m Od elemental torque 165147 19 N-m Oe elemental torque 138892 80 N-m