Correlation and prediction of efficiency of centrifugal pumps due to tip clearance effects

摘要

A wide range of specific speeds (n{sub}s = 17-80), based on five centrifugal pumps, was experimentally analysed to study the performance deterioration associated with tip clearance effects. Consequently and systematically, an empirical expressionwas developed that predicted the efficiency deterioration as a function of specific speed and tip clearance within a fairly good margin.