Non-Smooth Surface Flow Drag Reduction Characteristics of Centrifugal Pump Impeller

Abstract:

In order to improve the efficiency of centrifugal pump, based on the bionics principle, established non-smooth surfaces of various groove structure on the centrifugal pump impeller. The internal flow field of it was numerically simulated through RNG k-ε turbulence model. Research the drag reduction characteristics of non-smooth impeller in different groove shape and arrangement. The results showed that the biggest drag reduction rate of centrifugal pump with non-smooth blades is about 6.22%. The blades of non-smooth unit can effectively inhibit the near wall boundary layer flow state, reduce the shear stress on blades wall, reduce the internal fluid turbulent degree of centrifugal pump, so that the fluid flow in centrifugal pump impeller is more stable, improve the efficiency of centrifugal pump.

• Periodical: International Journal of Engineering Research in Africa (Volume 24)
• Pages: 44-56
• DOI: https://doi.org/10.4028/www.scientific.net/JERA.24.44
• Online since: June 2016
• Authors: Yun Qing Gu*, Zheng Zan Shi, Jie Gang Mou, Hao Shuai Wang, Pei Jian Zhou
• Keywords: Drag Reduction, Impeller, Non-Smooth Surface, Numerical Simulation

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