A gas turbine stage has an initial absolute pressure of 350 kPa and a temperature of 565°C with negligible initial velocity. At the mean radius, 0.36 m, conditions are as follows: Nozzle exit flow angle Nozzle exit absolute pressure Stage reaction 68° 207 kPa 0.2 Determine the flow coefficient and stage loading factor at the mean radius and the reaction at the hub, radius 0.31 m, at the design speed of 8000 rev/min, given that stage is to have a free-vortex swirl at this speed. You may assume that losses are absent. Comment upon the results you obtain. Take Cp = 1.148 kJ/(kg °C) and y = 1.33.

A gas turbine stage has an initial absolute pressure of 350 kPa and a temperature of 565°C with negligible initial velocity. At the mean radius, 0.36 m, conditions are as follows: Nozzle exit flow angle Nozzle exit absolute pressure Stage reaction 68° 207 kPa 0.2 Determine the flow coefficient and stage loading factor at the mean radius and the reaction at the hub, radius 0.31 m, at the design speed of 8000 rev/min, given that stage is to have a free-vortex swirl at this speed. You may assume that losses are absent. Comment upon the results you obtain. Take Cp = 1.148 kJ/(kg °C) and y = 1.33.

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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A: Solution is given below.

Question

2.
A gas turbine stage has an initial absolute pressure of 350 kPa and a temperature of 565°C
with negligible initial velocity. At the mean radius, 0.36 m, conditions are as follows:
Nozzle exit flow angle
Nozzle exit absolute pressure
Stage reaction
68°
207 kPa
0.2
Determine the flow coefficient and stage loading factor at the mean radius and the
reaction at the hub, radius 0.31 m, at the design speed of 8000 rev/min, given that stage is to
have a free-vortex swirl at this speed. You may assume that losses are absent. Comment upon
the results you obtain. Take Cp ‚ = 1.148 kJ/(kg ˚°C) and y = 1.33.

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