Design Improvement of the Splitter Blade in the Centrifugal Pump Impeller Based on Theory of Boundary Vorticity Dynamics

Binjuan ZHAO; Chenghu ZHANG; Youfei ZHAO; Yanxia FU; Qi LIU; Huilong CHEN

doi:10.5293/IJFMS.2018.11.1.039

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자료유형: 학술저널

저자정보: Binjuan ZHAO (Jiangsu University) Chenghu ZHANG (Jiangsu University) Youfei ZHAO (Jiangsu University) Yanxia FU (Jiangsu University) Qi LIU (Jiangsu University) Huilong CHEN (Jiangsu University)

저널정보: 한국유체기계학회 International Journal of Fluid Machinery and Systems International Journal of Fluid Machinery and Systems Vol.11 No.1

발행연도: 2018.3

수록면: 39 - 45 (7page)

DOI: 10.5293/IJFMS.2018.11.1.039

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To improve the design of the splitter blade in the centrifugal pump impeller, inner flow numerical simulations are performed on the centrifugal pump impeller without splitter blades firstly, inner flow diagnoses are performed based on the theory of the boundary vorticity dynamics, and distributions of the boundary vorticity flux (BVF), friction force as well as vorticity on the inner walls of the impeller are carefully analyzed to find the location of bad flows and their dynamic sources. Later, according to the inner flow diagnosis results, splitter blades are designed and reformed for the original impeller. The inner flow filed in the impellers equipped with the preliminary splitter blade and reformed splitter blade are numerically simulated and diagnosed. Finally, comparisons are made among the three impellers, and it is found that, compared to the original impeller (impeller 0), the BVF, friction force and vorticity distribution in the impeller equipped with the preliminary splitter blade (impeller 1) has no obvious improvement, although the pump head increases, the efficiency decreases; the BVF, friction force and vorticity distribution in the impeller equipped with the reformed blade (impeller 2) has improved obviously, BVF peak decreases evidently and BVF distributes more uniformly, flow separation is inhibited, the hydraulic force acting on the impeller increases, with the pump head and efficiency increasing dramatically. It is proven that, flow diagnosis based on the theory of the boundary vorticity dynamics is an effective supplemental way for the design of the splitter blade in the centrifugal pump impeller, and will provide reference for the design of other turbo machinery as well.

#Centrifugal pump impeller #Splitter blade #Boundary vorticity dynamics #Inner flow diagnosis #Design improvement

참고문헌 (23)

참고문헌 신청

Liu, B. / 2014 / Optimization design of a centrifugal compressor with splitters / Journal of Propulsion Technology 35(11):1461~1468

Shu, X. / 2015 / Numerical investigation of the influence of the splitter position on the flowfield and performance of a centrifugal compressor stage / International Journal of Fluid Machinery 43(9):31~35

Heo, M. / 2015 / Design optimization of a centrifugal fan with splitter blades / International Journal of Turbo & Jet-engines 32(2):143~154

Zhu, L. / 2013 / Numerical study on internal flow of small axial flow fan with splitter blades / Open Journal of Fluid Dynamics 3(2A):75~80

Hou, Y. / 2012 / Research on the length ratio of splitter blades for ultra-high head francis runners / Procedia Engineering 31:92~96

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