# Turbomachinery: Reaction Turbines

Please help with the following problem.

Sketch the fully annotated velocity triangles for a Parsons turbine stage. Use your sketch to show that the specific work produced per stage is given as w_stage = (C_b)^2 [1 + 2(f/C_b)(cot(B_1))].

At a particular stage of a Parsons reaction turbine, the mean blade speed is 60 m/s and the steam specific volume v = 0.577 m3/kg. The fixed and moving blades at this stage have inlet angles of 30 degrees and exit angles of 20 degrees. Sketch the velocity triangles and find:

a) The axial velocity

b) The blade height for this stage if the blade height is 1/10 of the mean blade diameter and the steam mass flow is 13.5 kg/s

c) The stage power

d) The diagram efficiency

https://brainmass.com/engineering/mechanical-engineering/turbomachinery-reaction-turbines-velocity-speed-volume-power-efficiency-37395

#### Solution Preview

Notations and assumptions:

[ ]* = total features (like p*, T*)

V1, V2 = absolute velocities

W1, W2 = relative ...

#### Solution Summary

This complete solution provides the student with explanation and step-by-step calculations and answers formatted in the attached Word document. A diagram of the Parsons turbine is illustrated. 282 words.