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The objective of this paper is to investigate a new method to increase the efficiency of the centrifugal pump under the guidance of the bionic coupling theory. A centrifugal pump with a bionic coupling impeller called a bionic coupling centrifugal pump (BCCP) was developed. Either riblets or concave dimples were engraved on the flank or blade back of the impellers and then coated with polyurethane...
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