Abstract No.C180227-243
Author name(s): Guorui JI1,2, Zonglong WANG1,2, Youlin CAI1,2, Ning LI1,2
Company: 1. Marine Design & Research Institute of China, China; 2. Science and Technology on Water Jet Propulsion Laboratory, China
The water-jet axial pump with front guide vane is a new type of pump. This kind of pump has the character of low head so there will be a large deviation in the head measurement because of the experimental pipeline friction loss in the hydraulic performance testing according to the relevant standard. The experimental result shows that the loss head is more than 5% of the pump fluid head, so the head loss should be paid enough attention. This paper researches the friction loss correction in the low head water-jet propulsion pump model hydraulic performance experiment. Three methods are adopted in analyzing the relationship between head loss and flow rate, which are friction loss semi-empirical formula calculation, differential pressure testing, the flow field CFD calculation of the experimental pipeline. A correction formula which is suitable for performance testing of low head standard water-jet propulsion model in laboratory is achieved, by comparing the difference of these three methods. Then the correction method is applied in the hydraulic performance testing of some type of low head water-jet propulsion pump with front guide vane, correcting the head. And the correction method is verified.
KEY WORDS: water-jet propulsion; axial-flow pump; front guide vane; head
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