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Book Description:

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Synopsis:

Provides readers with an understanding of aerodynamic design and performance of fans and compressors. The book includes practical emphasis on design problems, experimental facilities and data analysis, together with some design examples and novel concepts.

Table of Contents:

Preface
1 The axial fan
Introduction
The domestic ventilator
Work done
The diffusing blade passage
Mass flow variation
The fan characteristic
2 Reaction
Introduction
Definition
Choice of reaction
Variation of reaction with radius
3 The work and flow coefficient diagram
Introduction
Additions to the diagram
Reactions other than 50%
The IGV/rotor fan
The rotor/stator fan
4 Blade loading parameters
Introduction
Cascade data
Total pressure losses
Deviation
Axial velocity ratio
Compressor data
Blade geometry selection
5 Blade geometry
Introduction
The C series of aerofoils
American practice
Cascade geometry
The double circular arc blade
Modern trends
6 Aspect ratio
Introduction
Surge margin improvement
Other benefits
Technical considerations
Equivalent cone angle
End wall loss parameter
Design criteria
7 Relative motion effects
Introduction
Blade design with secondary losses
Wakes in relative motion
Work and flow coefficient effects
Radial flow shift through the rotor
8 Vortex flow
Introduction
Free vortex designs
Constant reaction
Arbitrary vortex
Simple equilibrium
Examples of simple equilibrium
Constant `reaction' design
Throughflow computations
9 Mach number effects
Introduction
High subsonic Mach number
Passage throat width
Supersonic Mach number
Blade forms for supersonic operation
Passage shock waves
S/C requirement
Laser anemometry
Effect of Mach number on overall pressure ratio
10 Reynolds number effects
Introduction
Performance variation
Wassell's correlation
Surface finish effects
11 Compressible flow relationships
Introduction
Notation
Fundamental relationships
Applications
12 The stage characteristic
Introduction
The work coefficient characteristic
The efficiency characteristic
The pressure rise coefficient
Experimental stage characteristics
13 The repeating stage concept
Introduction
The linear repeating stage
Stage of unity work coefficient
14 Spanwise matching of high diameter ratio stages
Introduction
Variable axial profile
Variable work done design
An alternative approach
15 Spanwise matching of low diameter ratio stages
Introduction
Example
Increased diameter ratio
Conclusions from the approximate method
Alternative methods
16 Stall
Introduction
Criteria for progressive or abrupt stall
Surge initiation
Rotating stall
Hysteresis
Vibration
Passive stall control
17 Surge
Introduction
An alternative criterion for surge
More complex approaches
Surge margin
18 Performance presentation
Introduction
Performance graphs
Isentropic and polytropic efficiency
Polytropic efficiency
Efficiency assessment
Efficiency with interstage bleed flows
19 Stage matching and surge control
Introduction
The stage matching problem
Bleed off-take
Variable stagger stator blades
Industrial axial compressors
Twin spool gas turbines
Off-design operation of twin spool gas turbines
Active surge control
20 Inlet flow maldistribution
Introduction
Compressors in parallel
Distortion parameter
Inlet Temperature distortion
21 Compressor rig testing
Introduction
Power requirements
Facility layout
Test procedure
22 Stage performance prediction
Introduction
A preferred method
Other methods
Off design efficiency
23 Overall performance prediction
Introduction
Stage stacking
Overall performance correlation
High speed corrections
Test comparison with prediction
24 Performance with altered gas properties
Introduction
The significance of density ratio
Gases other than air
Compression of helium
Viscosity and Reynolds number
25 Design for a domestic ventilator
Specification
Overall parameters
Blade speed and dimensions
Blade selection
Half speed operation
26 Design for an industrial fan
Specification
Preliminary considerations
Choice of diameter ratio
Rotor blade geometry
The outlet stator
The outlet diffuser
27 Design for a transonic wind tunnel fan
Specification
Preliminary considerations
Selection of vector geometry
The rotor blade
The stator
Annulus dimensions
Design speed
Fan efficiency
Outlet diffuser
Power requirement
Operation at higher tunnel Mach numbers
28 Design for an industrial compressor
Introduction
Design specification
General considerations
Design parameter selection
Rotor blade geometry
Stator blade geometry
Annulus diagram
Variation of stage numbers
Additional front stages
Scaled versions
Volume flow
29 Outline design for a jet engine compressor
Introduction
Specification
Overall parameters
First stage
Last stage
Blading
30 HP compressor mid-stage
Introduction
Datum stage
Blade end modifications
Rotor design
Stator blade
Design method
31 The high bypass fan
Introduction
General arrangement
Aerodynamic parameters
Rotor blade geometry
Fan blade integrity
Bibliography