In: Mechanical Engineering
This is problem 5-5 from El-Wakil’s Powerplant Technology book -- steam expands ideally in a turbine from 2500 psia and 1000 degFahrenheit to 1 psia. Compare the maximum steam velocities and the number of stages required by (a) a velocity-compounded impulse turbine, (b) a pressure-compounded impulse turbine, and (c) a 50 percent reaction turbine if the optimum blade velocity may not exceed 885 ft/s in any of them. Take all nozzle angles to be 25°.