Book contents
- Radial Flow Turbocompressors
- Radial Flow Turbocompressors
- Copyright page
- Dedication
- Contents
- Credits
- Introduction
- Preface
- Acknowledgements
- Conventions and Nomenclature
- 1 Introduction to Radial Flow Turbocompressors
- 2 Energy Transfer
- 3 Equations of State
- 4 Efficiency Definitions for Compressors
- 5 Fluid Mechanics
- 6 Gas Dynamics
- 7 Aerodynamic Loading
- 8 Similarity
- 9 Specific Speed
- 10 Losses and Performance
- 11 Impeller Design
- 12 Diffuser Design
- 13 Casing Component Design
- 14 Geometry Definition
- 15 Throughflow Code for Radial Compressors
- 16 Computational Fluid Dynamics
- 17 Compressor Instability and Control
- 18 Maps and Matching
- 19 Structural Integrity
- 20 Development and Testing
- References
- Index
15 - Throughflow Code for Radial Compressors
Published online by Cambridge University Press: 08 July 2021
- Radial Flow Turbocompressors
- Radial Flow Turbocompressors
- Copyright page
- Dedication
- Contents
- Credits
- Introduction
- Preface
- Acknowledgements
- Conventions and Nomenclature
- 1 Introduction to Radial Flow Turbocompressors
- 2 Energy Transfer
- 3 Equations of State
- 4 Efficiency Definitions for Compressors
- 5 Fluid Mechanics
- 6 Gas Dynamics
- 7 Aerodynamic Loading
- 8 Similarity
- 9 Specific Speed
- 10 Losses and Performance
- 11 Impeller Design
- 12 Diffuser Design
- 13 Casing Component Design
- 14 Geometry Definition
- 15 Throughflow Code for Radial Compressors
- 16 Computational Fluid Dynamics
- 17 Compressor Instability and Control
- 18 Maps and Matching
- 19 Structural Integrity
- 20 Development and Testing
- References
- Index
Summary
This chapter describes a streamline curvature throughflow method which has been developed specially for radial machines, such as centrifugal compressor stages, pumps and radial turbines. The method can also be used for axial machines, both compressors and turbines, and for axial compressors with a centrifugal rear stage. The terms in the governing equation are described in some detail to illustrate how the geometry controls the pressure and flow gradients both along and normal to the streamlines in the compressor. Such codes have been in use since the 1960s as they a offer a good overview of the ideal velocity and pressure distributions through a component. They also highlight blade loading issues and identify risks of choking. In the design process, the throughflow method weeds out the weakest design options very quickly and thus eliminates the need for more complex, time-consuming CFD simulations on poor designs. A comparison of a throughflow calculation with the test results on the Eckardt impeller A shows the limits of the method and the efficacy of this procedure for preliminary design.
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- Information
- Radial Flow TurbocompressorsDesign, Analysis, and Applications, pp. 480 - 527Publisher: Cambridge University PressPrint publication year: 2021