Question

1 In a Pelton-wheel turbine, a stream of water is deflected by a series of blades so that the rate at which water is deflected by the blades is equal to the rate at which water issues from the nozzle (Δm/Δt = ArhovA). Using the same notation as in Sample Prob. 14.8, (a) determine the velocity V of the blades for which maximum power is developed, (b) derive an expression for the maximum power, (c) derive an expression for the mechanical efficiency.

Answer 1

a) V = (1/2)*vA

b) Pmax = (1/4)ρAvA³(1-cosθ)

c) η=2(1-(V/vA))(V/vA)(1-cosθ)

Step-by-step explanation:

In the image the step by step exercise is solved.