Effect of Thickness Ratio Coefficient on the Mixture Transportation Characteristics of Helical-Axial Multiphase Pumps
Han, Wei1,2; Li, Xing1; Su, Youliang1; Su, Min3; Li, Rennian1,2; Zhao, Yu1
2020-01
Source PublicationAPPLIED SCIENCES-BASEL
Volume10Issue:1
AbstractWith the decrease of oil and gas resources on land, increased attention has been paid to multiphase oil-gas exploitation and the transportation technology represented by oil-gas multiphase pumps. The helical-axial multiphase pump has become the focus of research on oil and gas mixed transmission technology due to its relatively high operating efficiency and adaptability to a wide range of gas volume fraction changes. In order to investigate the thickness variation in the air foil from the hub to the shroud of the blade on the mixture transportation characteristics of the gas-liquid two-phase flow in a helical-axial pump, the thickness ratio coefficient xi was introduced, and the hydraulic performance of the single compression unit with different thickness ratio coefficients was investigated. A single compression unit including an impeller, diffuser, inlet section and outlet section of a helical-axial multiphase pump. The hydraulic performance including the hydraulic head and efficiency was investigated by numerical simulation with the Eulerian multiphase model and the shear stress transport (SST) k-w turbulence model. In order to demonstrate the validity of the numerical simulation approach, the hydraulic head and efficiency of the basic model was measured based on a gas-liquid two-phase flow pump performance test bench. The simulation results agreed well with the experimental results; the error between the simulation results and experimental results of different inlet gas volume fractions was within 10% at the design point, which indicated the numerical simulation method can be used in the research. The thickness ratio coefficient xi, which was taken as a variable, and the aggregation degree lambda of the gas were introduced to analyze the gas-liquid mixture transportation characteristics of the pump. The thickness ratio coefficient was selected in a range from 0.8 to 1.8. The results showed that, for the same hub thickness, the head coefficient and efficiency increase, and the aggregation degree of gas decreases with the decreasing of the thickness ratio coefficient. The head coefficient of the modification multiphase pump was 5.8% higher in comparison to the base pump while the efficiency was 3.1% higher than that of the base pump, the aggregation degree of this model was the lowest, which was 30.3%; the optimal model in the research was the model of scheme 1 with xi = 0.8. The accumulation of gas in the flow passage of the impeller could be delayed to the trailing edge of the blade by adjusting the thickness ratio coefficient, which produced a super-separated airfoil for helical-axial multiphase pumps and effectively ensured reliable operation under high gas volume fraction conditions. The accumulation area of gas was consistent with the area in which the gradient of turbulent kinetic energy was large.
Keywordhelical-axial multiphase pump mixture transportation characteristics thickness ratio coefficient aggregation degree super-separated airfoil
DOI10.3390/app10010345
Indexed BySCI
Language英语
Funding ProjectNational Key R&D Program Projects of China[2018YFB0606100] ; National Natural Science Foundation of China[51669012][51966010]
WOS Research AreaChemistry ; Engineering ; Materials Science ; Physics
WOS SubjectChemistry, Multidisciplinary ; Engineering, Multidisciplinary ; Materials Science, Multidisciplinary ; Physics, Applied
WOS IDWOS:000509398900345
PublisherMDPI
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Cited Times [WOS]:0   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.lut.edu.cn/handle/2XXMBERH/64248
Collection电气工程与信息工程学院
能源与动力工程学院
石油化工学院
Corresponding AuthorHan, Wei; Su, Min
Affiliation1.Lanzhou Univ Technol, Dept Energy & Power Engn, Lanzhou 730050, Peoples R China
2.Lanzhou Univ Technol, Key Lab Fluid Machinery & Syst, Lanzhou 730050, Peoples R China
3.Lanzhou Univ Technol, Dept Elect & Informat Engn, Lanzhou 730050, Peoples R China
First Author AffilicationLanzhou University of Technology
Corresponding Author AffilicationLanzhou University of Technology
First Signature AffilicationLanzhou University of Technology
Recommended Citation
GB/T 7714
Han, Wei,Li, Xing,Su, Youliang,et al. Effect of Thickness Ratio Coefficient on the Mixture Transportation Characteristics of Helical-Axial Multiphase Pumps[J]. APPLIED SCIENCES-BASEL,2020,10(1).
APA Han, Wei,Li, Xing,Su, Youliang,Su, Min,Li, Rennian,&Zhao, Yu.(2020).Effect of Thickness Ratio Coefficient on the Mixture Transportation Characteristics of Helical-Axial Multiphase Pumps.APPLIED SCIENCES-BASEL,10(1).
MLA Han, Wei,et al."Effect of Thickness Ratio Coefficient on the Mixture Transportation Characteristics of Helical-Axial Multiphase Pumps".APPLIED SCIENCES-BASEL 10.1(2020).
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