Fluid Dynamics of Cavitation and Cavitating Turbopumps (eBook)

Preface 6
Contents 8
The Rayleigh-Plesset equation: a simple and powerful tool to understand various aspects of cavitation. 9
1 Introduction 9
2 The Rayleigh-Plesset equation 17
3 A few basic results 19
4 Cavitation scaling 24
5 Thermodynamic effect 29
6 Supercavitation 33
7 Cavitation erosion 36
8 Vortex cavitation 44
9 Cavitation modeling 45
10 Conclusion 47
Bibliography 48
Hydrodynamics and Cavitation of Pumps 50
Cavitation Instabilities in Turbopump Inducers 175
Cavitating Flow Through Inducers 175
Rotating Cavitation in 3- and 4-Bladed Inducers 177
Various Cavitation Instabilities in a 3-Bladed Inducer 179
Conclusion 182
Bibliography 183
Stability Analysis of Cavitating Flows Through Inducers 197
1 One Dimensional Stability Analysis 197
2 Two-Dimensional Flow Stability Analysis with a Closed Cavity Model 202
3 Two-Dimensional Analysis of Cavitation Instabilities with a Waked Cavity Model 204
4 Conclusion 207
Bibliography 208
Suppression of Cavitation Instabilities 217
1 Leading Edge Sweep 217
2 Housing Enlargement at the Inlet 222
3 Conclusion 224
Bibliography 225
Tip Leakage and Backflow Vortex Cavitation 236
1 Tip Leakage Cavitation 236
2 Backflow Vortices 239
3 Conclusion 245
Bibliography 245
The Different Role of Cavitation on Rotordynamic Whirl Forces in Axial Inducers and Centrifugal Impellers 257
1 Introduction 257
2 Linearized Dynamics of the Cavitating Flow in a Whirling Inducer 259
3 Rotordynamic Forces on Whirling and Cavitating Axial Inducers 265
4 Linearized Dynamics of the Cavitating Flow in a Whirling Centrifugal Impeller 268
5 Rotordynamic Forces on Whirling and Cavitating Radial Impellers 272
6 Limitations 276
7 Summary and Conclusions 277
8 Acknowledgements 278
9 Nomenclature 278
Bibliography 280
A hyperbalic non equilibrium model for cavitating flows 283
Towards the simulation of cavitating flows in inducers through a homogeneous barotropic flow model 321