Water Vortex Power Plant: Fluid Resistance

[kenotmax]

Hi, I would like some help for my final project. I'm trying to find an eqn for fluid resistance which is present on the frontal side of the blade as it spins:


so far what I've come up by dimensional analysis is the drag force equation:

F=Cd x ( ρ x v^2)/2 x A

to get the fluid resistance:
Fvortex - Fresistance =Ftorque

Fvortex can be calculated by the force of an annulus eqn
as for the Fturbine.. it can be acquired using torquemeter..

My goal would to reduce the effect of the fluid resistance.

Thanks in advance.

 

[Navin A S]

The equation for fluid resistance that you have is correct. To reduce the effect of the fluid resistance, you can reduce the drag coefficient (Cd) or increase the cross-sectional area (A). Reducing the drag coefficient can be done by using smoother surfaces, reducing air turbulence, and using a streamlined shape. Increasing the cross-sectional area can be done by increasing the size of the blade.