An Investigation of the Effect of Blade Curvature on Centrifugal-Impeller Performance
Blade curvatures of geometrically definable shapes and of different blade loadings were compared on basis of particle travel with constant axial velocity along blade surface. Three impellers were tested with vaneless diffuser in variable-component compressor test rig with same conditions and instrum...
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| Zusammenfassung: | Blade curvatures of geometrically definable shapes and of different blade loadings were compared on basis of particle travel with constant axial velocity along blade surface. Three impellers were tested with vaneless diffuser in variable-component compressor test rig with same conditions and instrumentation. Elliptical blade had highest peak adiabatic efficiency at all equivalent speeds except 1400 and 1600 ft/sec. Circular blade had largest maximum specific capacity at all speeds. Parabolic blade had largest operating range above adiabatic efficiency of 0.70 from pressure ratios of 2.20 to 3.00. |
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