Pressure fluctuation in a side channel pump under gas-liquid two-phase flow

CHEN Ke1,ZHANG Fan1,HONG Feng2,CAO Puyu1,YUAN Shouqi1,HONG Qiuhong3

Journal of Vibration and Shock ›› 2021, Vol. 40 ›› Issue (6) : 1-10.

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PDF(3463 KB)
Journal of Vibration and Shock ›› 2021, Vol. 40 ›› Issue (6) : 1-10.

Pressure fluctuation in a side channel pump under gas-liquid two-phase flow

  • CHEN Ke1,ZHANG Fan1,HONG Feng2,CAO Puyu1,YUAN Shouqi1,HONG Qiuhong3
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Abstract

The side channel pump is a new type of super low specific speed pump.Due to its great merits such as low flowrate with high hydraulic head, great self-priming ability and especially gas-liquid two phase flow, recently, this kind of pump has been widely applicated in chemical industry, auto industry, pharmaceutical industry and oil & gas exploitation.However, the internal flow is very complex and the turbulence intensity is extremely high in side channel pumps, which is bound to produce strong pressure fluctuation, resulting in reduced performance and unstable operation of side channel pumps, and this effect is more serious in gas-liquid mixed transport.Numerical simulations were performed on the internal flow of a side channel pump under different inlet gas volume fraction (IGVF), and its pressure fluctuation characteristics were analyzed under two-phase flow.As can be seen from results, the MUSIG model can go for numerical simulations of the side channel pump under gas-liquid two-phase flow.A little gas inside is helpful to improve the flow pattern in most areas of the side channel pump, but it will lead to serious pressure fluctuation at the radial gaps, which is also the main factor for the unstable operation of the side channel pump when the gas-liquid mixture is transferred.The main frequency of pressure fluctuation is independent of the IGVF and is always equal to multiple of shaft frequency.The pressure fluctuation in impeller is always larger than that in side channel.This study provides the basis for the optimal design of side channel pumps in gas-liquid mixed transport condition and has important engineering application value.

Key words

side channel pump / gas-liquid two-phase flow / inlet gas volume fraction(IGVF) / pressure fluctuation

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CHEN Ke1,ZHANG Fan1,HONG Feng2,CAO Puyu1,YUAN Shouqi1,HONG Qiuhong3. Pressure fluctuation in a side channel pump under gas-liquid two-phase flow[J]. Journal of Vibration and Shock, 2021, 40(6): 1-10

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