Page 150 - Fluid Mechanics and Thermodynamics of Turbomachinery
P. 150
Axial-flow Turbines: Two-dimensional Theory 131
2
*
p * /p 0
1.5
1
/h 0
h
0.5
0
0 0.4 0.8
s
FIG. 4.27. Variation of peak efficiency and non-dimensional pressure drop (in
comparison to the values for an isolated aerofoil) vs solidity: - - - pressure
efficiency (adapted from Raghunathan et al. 1995).
1.0
0.8
Crawl region
hub/tip ratio, u 0.6
0.4
Full self-start
region
0.2
0
0 0.4 0.8
s
FIG. 4.28. Self-starting capability of the Wells turbine (adapted from Raghunathan
et al. 1995).
