Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2018 Winter 5th Sem New 2150102 Fundamentals Of Turbo Machines Previous Question Paper
1
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ?V (NEW) EXAMINATION ? WINTER 2018
Subject Code:2150102 Date:11/12/2018
Subject Name:Fundamentals of Turbo Machines
Time: 10:30 AM TO 01:00 PM Total Marks: 70
Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
Q.1 (a) Difference between rotor blade and stator blade. 03
(b) Explain high reaction stages for axial compressor stage. 04
(c) Difference between positive displacement machine and
turbomachines.
07
Q.2 (a) Draw surging in compressors. 03
(b) Define Degree of reaction for axial compressor and axial
turbine.
04
(c) Explain H-S diagram for axial compressor stage. 07
OR
(c) Draw and explain variation of air angles and degree of
reaction along the blade height in a free vortex stage.
07
Q.3 (a) Draw a pressure and velocity variation through a
compressor stage.
03
(b) Explain ideal and actual performance curves for an axial
compressor.
04
(c) Write a short note on stall propagation in a compressor
blade row.
07
OR
Q.3 (a) Difference between compressor and turbine. 03
(b) Draw an energy flow diagram for an axial flow
compressor stage.
04
(c) Write a short note on free vortex flow for axial compressor
stage.
07
Q.4 (a) Explain zero degree reaction stage for axial turbine stage. 03
(b) Derive relation for total to total efficiency for axial turbine
stage.
04
(c) Draw and explain a velocity triangle for axial turbine
stage.
07
OR
Q.4 (a) Draw stodola?s model of flow with slip. 03
(b) Draw entry and exit velocity triangles for impeller blades
only in the radial section, backward swept blades for
centrifugal compressor.
04
(c) Explain elements of a centrifugal compressor stage. 07
Q.5 (a) Write an equation of Balje?s formula. 03
(b) Draw and explain an Impulse turbine stage. 04
(c) Explain Counter rotating blade rings of a Ljungstrom
turbine with neat sketch.
07
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1
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ?V (NEW) EXAMINATION ? WINTER 2018
Subject Code:2150102 Date:11/12/2018
Subject Name:Fundamentals of Turbo Machines
Time: 10:30 AM TO 01:00 PM Total Marks: 70
Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
Q.1 (a) Difference between rotor blade and stator blade. 03
(b) Explain high reaction stages for axial compressor stage. 04
(c) Difference between positive displacement machine and
turbomachines.
07
Q.2 (a) Draw surging in compressors. 03
(b) Define Degree of reaction for axial compressor and axial
turbine.
04
(c) Explain H-S diagram for axial compressor stage. 07
OR
(c) Draw and explain variation of air angles and degree of
reaction along the blade height in a free vortex stage.
07
Q.3 (a) Draw a pressure and velocity variation through a
compressor stage.
03
(b) Explain ideal and actual performance curves for an axial
compressor.
04
(c) Write a short note on stall propagation in a compressor
blade row.
07
OR
Q.3 (a) Difference between compressor and turbine. 03
(b) Draw an energy flow diagram for an axial flow
compressor stage.
04
(c) Write a short note on free vortex flow for axial compressor
stage.
07
Q.4 (a) Explain zero degree reaction stage for axial turbine stage. 03
(b) Derive relation for total to total efficiency for axial turbine
stage.
04
(c) Draw and explain a velocity triangle for axial turbine
stage.
07
OR
Q.4 (a) Draw stodola?s model of flow with slip. 03
(b) Draw entry and exit velocity triangles for impeller blades
only in the radial section, backward swept blades for
centrifugal compressor.
04
(c) Explain elements of a centrifugal compressor stage. 07
Q.5 (a) Write an equation of Balje?s formula. 03
(b) Draw and explain an Impulse turbine stage. 04
(c) Explain Counter rotating blade rings of a Ljungstrom
turbine with neat sketch.
07
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2
OR
Q.5 (a) Explain with equation spouting velocity. 03
(b) Draw a performance chart for various axial turbine stages. 04
(c) Explain elements of a radial turbine stage with neat
sketch.
07
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This post was last modified on 20 February 2020