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World Journal of Engineering Research and Technology

( An ISO 9001:2015 Certified International Journal )

An International Peer Reviewed Journal for Engineering Research and Technology

An Official Publication of Society for Advance Healthcare Research (Reg. No. : 01/01/01/31674/16)

ISSN 2454-695X

Impact Factor : 7.029

ICV : 79.45

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Abstract

NUMERICAL SIMULATION OF STEADY FLOW IN A PUMP AS TURBINE UNDER TYPICAL WORKING CONDITIONS

Ji-Wei Shen*, Qing-Ming Jin, He-Chao Guo, Zhi-Yang Zhao, Bo Wang, Ke-Xin Xie

ABSTRACT

Pump as Turbine are widely applied in high-pressure liquid energy recovery processes due to their low acquisition cost, high energy recovery efficiency, and long service life. This paper conducts a numerical simulation of the turbine process for the single-stage centrifugal pump based on the STMPLEC algorithm. The preliminary analysis was conducted on the flow field inside the hydraulic turbine when the medium is clear water, under different inlet flow rates. The turbulence kinetic energy contour, vorticity contour, and pressure and velocity contour, as well as streamline and velocity vector plots for theblade unfolded diagram, were obtained. The results show that as the inlet flow rate increases, the turbulence kinetic energy and vorticity inside the pump as turbine significantly increase. However, the velocity and pressure around the blades gradually decrease, and vortices are generated at the blade outlet. As the curve extends from the center of the impeller to the volute, the pressure and velocity gradually increase, while the turbulence kinetic energy significantly increases with the inlet flow rate.

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