Page 334 - Fluid Mechanics and Thermodynamics of Turbomachinery

316 Index
Cascade, two-dimensional Ch. 3 (continued) Circulation 61, 171
performance law 63 Coefficient of
pressure rise coefficient 59 cavitation 207, 303
profile losses 69 contraction 65
profile thickness distribution 56 drag 60 1
reference incidence angle 69 energy transfer 6
space-chord ratio 57 flow 6
stagger angle 57 head 6
stall point 69 lift 60 1
tangential force coefficient 59 power 6
test results 67 et seq. pressure rise 59
turbine correlation (Ainley) 81 et seq. profile loss 82
wind tunnel 56, 63 pressure loss 68
working range of flow incidence 69 tangential force 59
Cavitation 8 12, 301 4 total pressure loss 59
avoidance 304 volumetric flow 6
corkscrew type 302 Compressible fluid analysis 16 20
effect on pump performance 8 Compressible flow through fixed row
erosion caused by 13, 301 180 1
inception 12 13 Compressible gas flow relations 15 16
limits 13 Compressor:
net positive suction head 14 control of instabilities 159 60
pump inlet 206 7 fluctuating pressure in blade rows 20,
tensile stress in liquids 14 21
Thoma’s coefficient 302, 304 losses in a stage 70
vapour formation 14 off-design performance 145 6
vapour pressure 302 4 pressure ratio of a multistage 148 9
Centrifugal compressor Ch. 7 reaction ratio 143 4
choking of stage 230 et seq. stage loading 144 5, 148
condition for maximum flow 205 et seq. stage losses and efficiency 142
conservation of rothalpy 204 stage pressure rise 147 8
diffuser 201, 205, 227 30 stage thermodynamics 141
effect of prewhirl 209 10, 211, 212 stage velocity diagrams 140
effect of backswept vanes 221 5 stall and surge 19, 137, 154 6
impeller 203 4 Compressor cascade
inducer section 202, 210 characteristics 69 70
inlet analysis 208 11 equivalent diffusion ratio 74
inlet casing 203 Howell’s correlation 68 70, 74 9
kinetic energy leaving impeller 225 7 Lieblein’s correlation 71 4
limitations of single stage 205 6 Mach number effects 78 9
Mach number at impeller exit 223 4 McKenzie’s correlation 80 1
pressure ratio 219 22 off-design performance 76 8
scroll 201 performance 68, 71 9
slip factor 213 18 wake momentum thickness ratio 73
uses 199 200 ultimate steady flow 151
use of prewhirl 212 work done factor 150 1
vaned diffusers 228 30 Constant specific mass flow 181 3
vaneless diffusers 227 8 Continuity equation 23 4
volute 201 Control surface 5
Centrifugal pump characteristics 7 9 Control variables 5
head increase 28 9 Corresponding points 7
Choked flow 19,20 Cosine Rule 147