Question

QUESTION 6 (Steam Turbines) The velocity of steam leaving the nozzle of an impulse turbine is 900 m/s and the nozzle angle is 20°. The blade velocity is 300 m/s and the blade friction factor is 0.7. Calculate for a mass flow rate of 1 kg/s and symmetric blading a) the blade inlet angle, b) the driving force on the wheel, c) the axial thrust, d) the diagram power, e) the diagram efficiency.

          QUESTION 6 (Steam Turbines)
The velocity of steam leaving the nozzle of an impulse turbine is 900 m/s and the nozzle angle
is 20°. The blade velocity is 300 m/s and the blade friction factor is 0.7. Calculate for a mass flow
rate of 1 kg/s and symmetric blading
a) the blade inlet angle,
b) the driving force on the wheel,
c) the axial thrust,
d) the diagram power,
e) the diagram efficiency.

QUESTION 6 (Steam Turbines)
The velocity of steam leaving the nozzle of an impulse turbine is 900 m/s and the nozzle angle
is 20°. The blade velocity is 300 m/s and the blade friction factor is 0.7. Calculate for a mass flow
rate of 1 kg/s and symmetric blading
a) the blade inlet angle,
b) the driving force on the wheel,
c) the axial thrust,
d) the diagram power,
e) the diagram efficiency.

Added by Blake B.

Thermodynamics: An Engineering Approach

Yunus A. Çengel, Michael A. Boles 8th Edition

Chapter 5

Instant Answer

Solved by Expert Adi S

07/19/2023

Step 1

The steam velocity leaving the nozzle (V1) is given as 900 m/s at a nozzle angle of 20°. We need to resolve this velocity into its tangential (V1u) and axial (V1a) components. The tangential component is given by V1u = V1 * cos(20°) and the axial component by V1a Show more…

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QUESTION 6 (Steam Turbines) The velocity of steam leaving the nozzle of an impulse turbine is 900 m/s and the nozzle angle is 20°. The blade velocity is 300 m/s and the blade friction factor is 0.7. Calculate for a mass flow rate of 1 kg/s and symmetric blading a) the blade inlet angle, b) the driving force on the wheel, c) the axial thrust, d) the diagram power, e) the diagram efficiency.