Name: Note for Turbo Machines - TM by Abhimanyu Dash
Rating: 3 (6 reviews)
Author: Digbijay Patil

Definition of turbo machine, parts of turbo machines, Comparison with positive displacement machines, Classification, Dimensionless parameters and their significance, Effect of Reynolds’s number, Unit and specific quantities, model studies. Application of first and second laws of thermodynamics to turbo machines, Efficiencies of turbo machines.

Introduction

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

Energy Exchange In 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, Theoretical head – capacity relationship, General analysis of axial flow pumps and compressors, degree of reaction, velocity triangles

General Analysis Of Turbo Machines

Classification, Single stage impulse turbine, condition for maximum blade efficiency, stage efficiency, Need and methods of compounding, Multi-stage impulse turbine, expression for maximum utilization factor, Reaction turbine – Parsons’ turbine, condition for maximum utilization factor, reaction staging

Stream Turbines

Classification, Different efficiencies, Pelton turbine –velocity triangles, design parameters, Maximum efficiency. Francis turbine-velocity triangles, design parameters, runner shapes for different blade speeds. Draft tubes- Types and functions. Kaplan and Propeller turbines -velocity triangles, design parameters

Hydraulic Turbines

Classification and parts of centrifugal pump, different heads and efficiencies of centrifugal pump, Minimum speed for starting the flow, Maximum suction lift, Net positive suction head, Cavitations’, Need for priming, Pumps in series and parallel.