Page 6 - Fluid Mechanics and Thermodynamics of Turbomachinery

Contents

PREFACE TO FOURTH EDITION ix

PREFACE TO THIRD EDITION xi

ACKNOWLEDGEMENTS xiii

LIST OF SYMBOLS xv

1. Introduction: Dimensional Analysis: Similitude 1
Definition of a turbomachine 1
Units and dimensions 3
Dimensional analysis and performance laws 4
Incompressible fluid analysis 6
Performance characteristics 7
Variable geometry turbomachines 9
Specific speed 10
Cavitation 12
Compressible gas flow relations 15
Compressible fluid analysis 16
The inherent unsteadiness of the flow within turbomachines 20
References 21
Problems 22

2. Basic Thermodynamics, Fluid Mechanics: Definitions of Efficiency 23
Introduction 23
The equation of continuity 23
The first law of thermodynamics internal energy 24
The momentum equation Newton’s second law of motion 25
The second law of thermodynamics entropy 29
Definitions of efficiency 30
Small stage or polytropic efficiency 35
Nozzle efficiency 41
Diffusers 43
References 53
Problems 53