Elsevier S & T

Turbomachinery Performance Analysis

Lewis, R. I.

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Table of contents
  • Cover
  • Contentsvii
  • Prefacexiii
  • Acknowledgementsxvii
  • Chapter 1. Basic equations and dimensional analysis1
  • Introduction1
  • 1.1 Basic governing equations5
  • 1.2 Dimensional analysis8
  • Chapter 2. Two-dimensional cascades21
  • Introduction21
  • 2.1 Cascade dynamics and parameters24
  • 2.2 Diffuser efficiency of a compressor cascade29
  • 2.3 Specification of blade profile geometry32
  • 2.4 Use of program CASCADE to perform the direct analysis33
  • 2.5 Design of a cascade by the inverse method35
  • 2.6 'Shock-free' inflow and optimum incidence of a cascade37
  • 2.7 Diffusion factors for compressor cascades40
  • 2.8 Nominal deflection and fluid deviation44
  • Chapter 3. Principles of performance analysis for axial turbines47
  • Introduction47
  • 3.1 Dimensional analysis for a single stage48
  • 3.2 Total-to-total efficiency ηTT54
  • 3.3 50% reaction stages55
  • 3.4 An experimental correlation based on model tests60
  • 3.5 Stages with arbitrary reaction R68
  • 3.6 Variation of reaction with radius in a free vortex turbine stage72
  • 3.7 Axial turbines with zero interstage swirl76
  • Chapter 4. Performance analysis for axial compressors and fans82
  • Introduction82
  • 4.1 Dimensional analysis for an axial compressor83
  • 4.2 Simple analytical formulation for the total-to-total efficiency of a compressor stage88
  • 4.3 Experimental correlation of optimum axial compressor stages – 'Smith' diagrams90
  • 4.4 Lift and drag coefficients and diffusion factor re-expressed in terms of duty coefficients91
  • 4.5 Compressor stages with arbitrary reaction95
  • 4.6 Selection of optimum blade profile geometry using theoretical cascade flow analysis99
  • 4.7 High reaction axial fan stages102
  • 4.8 Influence of pitch/chord ratio upon the deflection properties of cascades and upon the Φ-&#105
  • Chapter 5. Simplified meridional flow analysis for axial turbomachines107
  • Introduction107
  • 5.1 The free-vortex axial fan108
  • 5.2 Radial equilibrium analysis for axial turbomachines112
  • 5.3 Solution of the radial equilibrium equation for the inverse and direct problems114
  • 5.4 Actuator disc theory applied to an axial turbomachine blade row124
  • 5.5 Actuator disc analysis for a single rotor axial fan126
  • 5.6 Actuator disc theory applied to multiple blade rows– the design problem133
  • Chapter 6. Vorticity production in turbomachines and its influence upon meridional flows143
  • Introduction143
  • 6.1 Equations of motion for axisymmetric flow144
  • 6.2 Comparison of the radial equilibrium equation with the true radial momentum equation149
  • 6.3 Stokes' stream function and the governing equations for meridional flow150
  • 6.4 Streamwise and smoke-ring vorticity154
  • 6.5 Analytical solution for linearised cylindrical actuator disc theory158
  • 6.6 Compressible flow actuator disc theory162
  • Chapter 7. Mixed-flow and radial turbomachines179
  • Introduction179
  • 7.1 Origins of specific work input in mixed-flow fans and pumps182
  • 7.2 Stagnation enthalpy relative to a rotor and rothalpy185
  • 7.3 Dimensionless performance parameters for mixed-flow fans and pumps187
  • 7.4 Geometrical techniques for dealing with design and analysis of mixed-flow cascades194
  • 7.5 Relative eddy and slip flow in radial and mixed-flow turbomachines200
  • 7.6 Some other slip factor formulations for radial and mixed-flow fans and pumps208
  • Chapter 8. Ducted propellers and fans211
  • Introduction211
  • 8.1 One-dimensional actuator disc performance analysis for open propellers212
  • 8.2 Kort Nozzle and Pump Jet ducted propellers218
  • 8.3 Dimensional analysis for ducted propellers220
  • 8.4 More detailed performance analysis for ducted propellers225
  • 8.5 Prediction of Kort Nozzle ducted propeller characteristic curves237
  • Chapter 9. Selected supporting fluid dynamic analysis245
  • Introduction245
  • 9.1 The physical basis of surface vorticity modelling246
  • 9.2 Computational scheme for flow past a body in a uniform stream253
  • 9.3 Lifting aerofoils255
  • 9.4 Turbomachine cascades260
  • 9.5 Axisymmetric bodies, ducts and ducted propellers265
  • Appendix I. 'FIPSI': A computer program for selection and performance analysis of axial turbine stag275
  • 1.1 Introduction and overview275
  • 1.2 Main bar menu and default turbine design276
  • 1.3 Pull-down menus277
  • 1.4 Viewing options280
  • 1.5 [File etc.] option282
  • 1.6 Disc file FIPSI.DAT282
  • 1.7 Contents of output data file JUNK for the default turbine design283
  • 1.8 Contents of the Φ,Ψ, data file FIPSI.DAT285
  • Appendix II. 'CASCADE': A computer program for design and analysis of turbomachine cascades288
  • II.1 Introduction and overview288
  • II.2 Profile menu290
  • II.3 Camber line menu294
  • II.4 Cascade geometry – Stagger,t/I menu294
  • II.5 Inlet angle menu294
  • II.6 Design/analyse menu294
  • II.7 Quit/DOS/File menu297
  • II.8 Example – design of an optimum compressor cascade299
  • II.9 Contents of data file profiles301
  • II.10 Contents of data file rawdata304
  • II.II Sample contents of output file testdata for the default design305
  • Appendix III. 'STACK': a computer program for geometrical design and analysis of turbomachine cascad309
  • III.1 Introduction and overview309
  • III.2 Menus for editing blade profile geometry311
  • III.3 The Geometry menu311
  • III.4 The Display menu315
  • III.5 The Section menu315
  • III.6 The Quit/save/DOS menu317
  • III.7 Screen dumping of results318
  • III.8 Contents of file section.dat319
  • References320
  • Index325
  • Authors' index329
Book details
  • Vendor Elsevier S & T
  • SKU 9780340631911
  • ISBN-13 9780080543321
  • Author Lewis, R. I.
  • Category Technology & Engineering
  • Subject Mechanical

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Description eBook delivery & access Reviews
This modern overview to performance analysis places aero- and fluid-dynamic treatments, such as cascade and meridional flow analyses, within the broader context of turbomachine performance analysis. For the first time ducted propellers are treated formally within the general family of turbomachines. It also presents a new approach to the use of dimensional analysis which links the overall requirements, such as flow and head, through velocity triangles to blade element loading and related fluid dynamics within a unifying framework linking all aspects of performance analysis for a wide range of turbomachine types. Computer methods are introduced in the main text and a key chapter on axial turbine performance analysis is complemented by the inclusion of 3 major computer programs on an accompanying disc. These enable the user to generate and modify design data through a graphic interface to assess visually the impact on predicted performance and are designed as a Computer Aided Learning Suite for student project work at the professional designer level.

Based on the author's many years of teaching at degree level and extensive research experience, this book is a must for all students and professional engineers involved with turbomachinery.