Characteristics of energy transformation in disc impellers with holes
WANG Tao 1,2, XIANG Ru1,2*, YAN Jing 1,2, ZHOU Min1,2
1. School of Energy and Power, Xihua University, Chengdu, Sichuan 610039, China; 2. Key Laboratory of Fluid and Power Machinery, Ministry of Education(Xihua University), Chengdu, Sichuan 610039, China
Abstract：In order to study the flow and energy conversion characteristics of disc impeller with holes, based on energy conservation theorem and quantitative mathematical calculation analysis, the mechanism of doing work which differs from that of centrifugal pumps was analyzed, that is, the disc impeller performs work by making use of the thrust which caused Coriolis acceleration and the increment of mechanical energy of fluid was equivalent to the work performed by disc impeller. It is proved that the working mechanism of this kind of impeller for water flow is different from that of vane pump, that is, the impeller works on the water with the force generating Coriolis acceleration, and there is an equivalent relationship between the amount of work done by the impeller and the increment of water flow mechanical energy. At the same time, some hydraulic characteristics of this kind of pump which are different from centrifugal pump are revealed theoretically: the theoretical head produced by the impeller does not change with the flow. Disc pump generate higher heads than centrifugal pumps with the same impeller diameters and rotation speed. The results will help develop research approach for disc pumps and be beneficial in flow and energy conversion study in disc pumps.
王桃,向茹*,严敬,周敏,. 圆盘通孔叶轮的能量转换特性[J]. 排灌机械工程学报, 2022, 40(8): 771-776.
WANG Tao,XIANG Ru*,YAN Jing,ZHOU Min,. Characteristics of energy transformation in disc impellers with holes. Journal of Drainage and Irrigation Machinery Engin, 2022, 40(8): 771-776.
