Abstract
The performance of a regenerative pump is affected by many parameters, especially blade shape of impeller, leakage flow iii the clearance and head losses at the inlet & outlet. An impeller with J-shape blade was designed and 5 times scale up model was tested at similarity conditions to evaluate the performance Performance variations with clearance change were executed The amounts of leakage flow through the clearance were estimated using the one-dimensional leakage flow models and analysis. Main leakage flow is generated through the gap between the impeller and casing. The inlet & outlet head losses were also estimated such corrections are very important to evaluate the final performance of the impeller and pump. Cavitation test was also performed at 1,200 rpm NPSH of the regenerative pump was obtained and growth of cavity within blades was visualized.
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