Abstract:
The experimental study is carried out on high-speed centrifugal
pumps with three different impellers. The experimental results
and analysis show that high-speed centrifugal pumps with a
closed complex impeller can achieve the highest efficiency and
the lowest head coefficient followed by those with half-open
impeller and open-impeller, and can obtain much easily stable
head-capacity characrastic curve, while those with a half-open
complex impeller can’t. The characteristic curve with a open
impeller is almost constant horizontal line before dropping
sharply. The results also show that the axial clearance between
pump casing and impeller can influence greatly on the
performance of centrifugal pumps.
Key words:
Centrifugal pump High-speed Impeller Experiment
* This project is supported by National Natural Science Foundation of China (No.50105018) and Provincial Natural Science Foundation of Zhejiang
of China (No.501119). Received August 27, 2000; received in revised form
October 20, 2001; accepted March 1, 2002
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