Radial hydraulic force characteristics and internal flow field analysis in centrifugal pump based on double-tongue

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Journal of Vibration and Shock ›› 2016, Vol. 35 ›› Issue (11) : 116-122.

MOU Jie-gang LIU Jian GU Yun-qing DAI Dong-shun ZHENG Shui-hua MA Yi

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Abstract

In order to clarify the different tongue influence on the internal flow field of centrifugal pump. Based on k-ε turbulence model, the external characteristics were numerically simulated and tested under different operating conditions, which confirmed double-tongue centrifugal pump was feasible. Radial force characteristics, static pressure distribution and the turbulent kinetic energy on the impeller and volute were analyzed. Results show that:double-tongue have no obvious effect on the external characteristics; Radial hydraulic force on the volute is much larger under different operating conditions; when double-tongue is applied, radial hydraulic force on the impeller decrease slightly, and which reduce significantly on the volute; Tendency of fluid on the impeller are not far-off, and static pressure distribution were uniform for the two tongues; when double-tongue was applied at different times, diversification of static pressure distribution was smaller, especially on the diffuser of volute, which meaned double-tongue was much better for fluid.

Key words

centrifugal pump / double-tongue / numerical simulation / radial hydraulic force / flow field

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MOU Jie-gang LIU Jian GU Yun-qing DAI Dong-shun ZHENG Shui-hua MA Yi. Radial hydraulic force characteristics and internal flow field analysis in centrifugal pump based on double-tongue[J]. Journal of Vibration and Shock, 2016, 35(11): 116-122

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