TURBOMACHINES (BME502)

TURBOMACHINES

Course Code BME502 
CIE Marks 50
Teaching Hours/Week (L:T:P: S) 3:0:2:0 
SEE Marks 50
Total Hours of Pedagogy 40 hours Theory + 8­10 Lab slots 
Total Marks 100
Credits 04 
Exam Hours 3
Examination nature (SEE) Theory

MODULE­ 1

Introduction: Definition of turbo machine, parts of turbo machines, Comparison with positive

displacement machines, Classification, Dimensionless parameters and their significance, Unit and

specific quantities, model studies and its numerical. (Note: Since dimensional analysis is covered in

Fluid Mechanics subject, the questions on dimensional analysis should not be given. However,

dimensionless parameters and model studies may be given more weightage.)

Thermodynamics of fluid flow: Application of first and second law of thermodynamics to turbo

machines, Efficiencies of turbo machines, Static and Stagnation states, overall isentropic efficiency,

stage efficiency (their comparison) and polytropic efficiency for both compression and expansion

processes. Reheat factor for expansion process. Simple Numerical on stage efficiency and polytropic

efficiency.

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MODULE ­2

Energy exchange in Turbo machines: Euler’s turbine equation, Alternate form of Euler’s turbine

equation, Velocity triangles for different values of degree of reaction, Components of energy transfer,

Degree of Reaction, utilization factor, Relation between degree of reaction and Utilization factor,

Problems.

General Analysis of Turbo machines: Radial flow compressors and pumps – general analysis,

Expression for degree of reaction, velocity triangles, Effect of blade discharge angle on energy transfer

and degree of reaction, Effect of blade discharge angle on performance, , General analysis of axial flow

pumps and compressors, degree of reaction, velocity triangles, Numerical Problems.

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MODULE 3

4

Steam Turbines: Classification, Single stage impulse turbine, condition for maximum blade efficiency,

stage efficiency, Need and methods of compounding, Multi­stage impulse turbine, expression for

maximum utilization factor, Numerical.

Reaction turbine: Parsons’s turbine, condition for maximum utilization factor, reaction staging.

Numerical.

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MODULE ­4

Hydraulic Turbines: Classification, various efficiencies. Pelton Wheel – Principle of working,

velocity triangles, design parameters, maximum efficiency, and numerical.

Francis turbine – Principle of working, velocity triangles, design parameters, and numerical

problems

Kaplan and Propeller turbines: Principle of working, velocity triangles, design parameters and

Numerical. Theory and types of Draft tubes.

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MODULE­ 5

Centrifugal Pumps: Classification and parts of centrifugal pump, different heads and efficiencies of

centrifugal pump, Theoretical head – capacity relationship, Minimum speed for starting the flow,

Maximum suction lift, Net positive suction head, Cavitation, Need for priming, Pumps in series and

parallel. Problems.

Centrifugal Compressors: Stage velocity triangles, slip factor, power input factor, Stage work,

Pressure developed, stage efficiency and surging and problems.

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PRACTICAL COMPONENT OF IPCC (May cover all /major modules)

Experiments

1 Performance analysis of Pelton Wheel

2 Performance analysis of Francis turbine

3 Performance analysis of Kaplan turbine

4 Performance analysis of centrifugal blowers

5 Performance analysis of centrifugal pump

6 Performance analysis of Axial Fan and Radial Fan

Suggested Learning Resources:

TEST BOOKS

1. V. Kadambi and Manohar Prasad, An Introduction to Energy Conversion, Volume III, Turbo

machinery, New Age International Publishers, reprint 2008

2. M. S. Govinde Gowda, A Text of Turbo machines, 1st Edn, 2024, Iterative International Publishers

(IIP), ISBN: 978-­93­-6252-­884-­1.

REFERENCE BOOKS

1. Principals of Turbo machines, D. G. Shepherd, The Macmillan Company (1964).

2. Fluid Mechanics & Thermodynamics of Turbo machines, S. L. Dixon, Elsevier (2005).

3. Turbines, Compressors & Fans, S. M. Yahya, Tata McGraw Hill Co. Ltd., 2nd edition, 2002.

4. B.K Venkanna, Fundamentals of Turbo Machinery, PHI Publishers