高気液混合比適用形二相流遠心ポンプの相似設計に関する考察

概要

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A centrifugal pump, the pumping action of which could be highly kept even at an air-water two-phase flow condition of inlet void fraction more than 30 % in the range of relatively high water flow rate, has been developed. The pump consists of a tandem arrangement of double rotating cascades and blades of outer cascade have higher outlet angle more than 90°. In design of the two-phase flow pump for various sized and operating conditions, similarity relations of geometric dimensions to hydraulic performances is very useful. The similarity relations of rotational speed, impeller diameter and blade height are investigated for the developed impeller in the present paper. As the results, the similarity law of rotational speed and impeller diameter is verified experimentally even in two-phase flow condition. In addition, influences of blade height on air-water two-phase flow performances indicate a little difference from the similarity relations.
ターボ機械協会の論文
2008-08-10