Design of radial turbomachines

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書誌事項

Design of radial turbomachines

A. Whitfield, N.C. Baines

Longman Scientific & Technical , Wiley, 1990

  • : us
  • : uk

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内容説明・目次

内容説明

During the past three decades advances have been made in the fluid dynamic and thermodynamic design and understanding of radial flow turbomachines. Radial turbomachines possess their own distinctive characteristics, and present the engineer with as full a range of complexities as any fluid flow problem. This book describes the current technology and design methods for centrifugal compressors and radial turbines working in compressible flow. These are of particular relevance to gas turbine engines, internal combustion engine turbochargers, process compressors and cryogenic expanders. The aerodynamic design of the turbomachine is preliminary design to the specification of blade forms and computational fluid dynamic analysis of vane and blade passage flows. The treatment throughout is modern, with full recognition of current computer-aided design methods. However throughout the book a clear separation is made between the fundamental gas dynamics and the empiricism necessary to close the gap between theory and practice in situations of such complexity. Computer program listings for preliminary design are included. The problems posed by specific applications are dealt with in details: for example, techniques for the suppression of surge in centrifugal compressors and a consequent widening of the operating range, and the problems of pulse operation of radial turbines as encountered in turbocharger applications. The book contains comprehensive surveys of the literature in all these fields.

目次

  • Part 1: Outline of the book
  • history and applications
  • the centrifugal compressor
  • the radial turbine
  • non-dimensional parameters for performance assessment and design selection. Part 2 Fundamental fluid mechanics and thermodynamics: the basic equations
  • the dynamics of compressible, perfect gas flow
  • definitions of efficiency
  • loss coefficient definitions
  • stator performance parameters. Part 3 Preliminary design and analysis of centrifugal compressors: non-dimensional parameters for design selection
  • application of basic thermo-fluid dynamics to compressors
  • impeller design
  • diffuser performance, design and analysis. Part 4 Preliminary design and analysis of radial turbines: basic design concepts
  • preliminary design of the rotor
  • performance correlations
  • rotor passage
  • preliminary design of the stator
  • exhaust diffuser. Part 5 Generalised computer based one-dimensional performance prediction: generalised gas dynamic analysis
  • empirical flow models and loss correlations
  • summary of prediction procedure. Part 6 Modelling of compressor impellers with separated flow: performance prediction models
  • application to experimentation. Part 7 Geometric description of turbomachine blades and passages: surface definition by two-dimensional projection
  • functional representation of two-dimensional curves
  • geometry definition by three-dimensional surfaces
  • functional representation of three-dimensional surfaces. Part 8 Computation of internal flows: categorisation of methods
  • calculation domains
  • inviscid solution methods
  • viscous solution methods
  • coupled viscous-inviscid methods
  • modelling of stator flows. Part 9 Special problems associated with turbomachine design and operation: compressor surge and techniques to suppress it
  • high pressure ratio compressors
  • pulse operation of radial turbines
  • variable geometry stator for radial turbines
  • special features of radial turbine rotors
  • turbine rotor cooling
  • size effects and scaling. Appendices: preliminary design of centrifugal compressor impellers - computer program listing, description of the computer program
  • preliminary design of radial turbine rotors - computer program listing, description of the program
  • a summary of the governing equations for three-dimensional fluid flow - the conservation of mass, or continuity, equation, the momentum equation, the energy equation
  • discretisation methods - finite difference, finite element, finite volume.

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