Study on the distribution regularity of gas volume in multiphase pump

Asian Working Group- IAHR's Symposium on Hydraulic Machinery and Systems

Shi, G.T.^1,2 ; Luo, K.^1 ; Wang, Z.W.^1 ; Liu, Y.^1 ; Jiang, X.P.^3

Department of Power Machinery, University of Xihua, Chengdu, China^1

State Key Laboratory of Hydroscience and Engineering, Department of Thermal Engineering, Tsinghua University, Beijing

100084, China^2

School of Mechanical Electronic and Information Engineering, China University of Mining and Technology(Beijing), Beijing

100083, China^3

关键词: Circumferential direction;    Distribution regularities;    Gas phase volume;    Gas volume fraction;    Impeller inlets;    Multiphase pumps;    Small flow-rate;    Two fluid model;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/163/1/012001/pdf
DOI  :  10.1088/1755-1315/163/1/012001

来源: IOP

【 摘 要 】

In order to reduce the phase separation, air plug and turbulence vortex in the multiphase pump. The two-fluid model and the standard k-turbulence model are selected, the distribution regularity of gas phase volume within the multiphase pump is researched using the CFD software about air-liquid two-phase under the different working conditions. The results of the study showed that the gas phase gathers at the rim when the gas-liquid two-phase enter into the impeller inlet, and the gas phase is gradually increased at the rim with the increase of the flow rate, the gas is concentrated in the hub at the second half of the impeller, and the most serious aggregation is the small flow rate condition. When the flow is constant, the gas obviously increases in the guide vane hub with the increase of the gas volume fraction. With the increase of the gas volume fraction, the uniformity of the gas phase in the circumferential direction is deteriorated in the inlet and the middle of impeller, and the lower gas volume fraction region is decreased in the impeller. The results of the study reveal the distribution regularity of gas volume within the multiphase pump, provide the reference basis for the design of the multiphase pump under the higher gas volume fraction.