INFLUENCE OF IMPELLER LEADING EDGE PROFILES ON CAVITATION AND SUCTION PERFORMANCE
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Date
2013
Journal Title
Journal ISSN
Volume Title
Publisher
Turbomachinery Laboratory, Texas A&M Engineering Experiment Station
Abstract
The cavitation behavior and suction performance of a pump are
largely influenced by the geometry at the impeller eye. A
number of geometric factors at the impeller eye have an
influence on cavitation, such as, the inlet and hub diameters,
blade inlet angles and incidence to upstream flow, blade
number and thickness, blade passage throat area, surface
roughness, blade leading edge profiling, etc. In this paper, we
study the influence of blade leading edge profiles, keeping all
other parameters as identical, on the cavitation behavior of an
impeller. Leading edge profiles such as blunt, circular, elliptic,
and parabola are considered and the effect of different profiles
on cavitation inception, bubble growth, cavity length and
NPSH-3% head drop performance are investigated.
Experiments are performed on a cavitation visualization test rig
and complemented by two-phase computational fluid dynamic
(CFD) modeling and analysis.
Description
Lecture