5ME6: PRINCIPLES OF TURBOMACHINES

Unit 1
Basic Concepts of Turbo Machines: Definition of Turbo machine, classification, Basic laws and governing equations, continuity equation, steady flow energy equation(1st law of thermodynamics),2nd law of thermodynamics applied to turbo machines, Newton's 2nd law of motion applied to turbomachines - Euler's pump equation and Euler's turbine equation, dimensional analysis applied to hydraulic machines, power coefficient, flow coefficient, head coefficient, non-dimensional specific speed, Range of specific speeds for various turbo machines, Dimensional analysis applied to compressible flow machines, pressure ratio as a Function of temperature ratio, mass flow rate parameter and speed parameter.
Unit 2
Centrifugal Pumps: Main parts, work done and velocity triangles, slip and slip factor, pump losses and efficiencies, minimum starting speed, net positive suction head, performance curve.
Unit 3
Axial Flow Pumps: Description, velocity triangles, work done on the fluid, energy transfer, axial pump characteristics, cavitation.
Unit 4
Centrifugal Compressors and Fans: Components and description, velocity diagrams, slip factor, energy transfer, power input factor, stage pressure rise and loading coefficient, pressure coefficient, degree of reaction, Centrifugal compressor characteristic, surging, rotating Stall and Choking.
Unit 5
Axial Flow Compressors and Fans: Basic constructional features, turbine versus compressor blades Advantages of axial flow compressors, working principle, velocity triangle, elementary theory, stage work, work done factor, stage loading, degree of reaction; vortex theory, simple design calculations, introduction to blade design, cascade test, compressibility effects, operating characteristics.

Suggested Readings:
1. Principle of Turbo Machinery, Turton R.K., Springer Publication.
2. Fundamentals of Turbo Machinery, William W., John Wiley and Sons.
3. Gas Turbine Theory, Cohen and Roger, Pearson Education.
4. Turbo Machinery Basic Theory and Application, Logan E.J.
5. Principles of Turbo Machinery, Shepherd Dennis G., Mac Millan Publisher, New York.
6. TurboMachines, A Valan Arasu, Vikas Publishing House Pvt. Ltd.