Numerical Analysis of Impeller-Volute Tongue Interaction and Unsteady Fluid Flow in a Centrifugal Pump

Cheah, Kean Wee; Lee, T. S.; Winoto, S. H.; Zhao, Zhiguo

doi:10.1007/978-3-540-89749-1_9

Cited by 1 publication

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“…Among all turbulence models, the k-x turbulence model had superior performance on prediction of the velocity vector directions as well as the turbulent kinetic energy levels. Cheah et al [4] simulated the 3D and nonstationary turbulent flow through the centrifugal pump by means of commercial CFX 11.0 code, using the standard k-e turbulence model with scalable log-law wall functions for wall boundary condition treatment. Their numerical results predicted the head coefficient in good agreement with the experimental data.…”

Section: Introductionmentioning

confidence: 99%

Effects of Volute Curvature on Performance of a Low Specific-Speed Centrifugal Pump at Design and Off-Design Conditions

Alemi

Nourbakhsh

Raisee

et al. 2015

Journal of Turbomachinery

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The effects of the volute geometry on the head, efficiency, and radial force of a low specific-speed centrifugal pump were investigated focusing on off-design conditions. This paper is divided into three parts. In the first part, the three-dimensional flow inside the pump with rectangular volute was simulated using three well-known turbulence models. Simulation results were compared with the available experimental data, and an acceptable agreement was obtained. In the second part, two volute design methods, namely, the constant velocity and the constant angular momentum were investigated. Obtained results showed that in general the constant velocity method gives more satisfactory performance. In the third part, three volutes with different cross section and diffuser shape were designed. In general, it was found that circular cross section volute with radial diffuser provides higher head and efficiency. Moreover, the minimum radial force occurs at higher flowrate in circular volute geometry comparing to rectangular cross section volute.

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Section: Introductionmentioning

confidence: 99%