Effect of diffuser vane surface fouling on gas phase distribution uniformity in a gas–liquid multiphase pump

WU Guangkuan; JIA Dingmao; GE Zhenguo; FENG Jianjun; YAN Sina; ZHU Guojun; LUO Xingqi

doi:10.11949/0438-1157.20260821

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Effect of diffuser vane surface fouling on gas phase distribution uniformity in a gas–liquid multiphase pump

更新时间：2026-08-28

- Effect of diffuser vane surface fouling on gas phase distribution uniformity in a gas–liquid multiphase pump
- CIESC Journal (2026)
- 作者机构：
  
  1.西安理工大学旱区水工程生态环境全国重点实验室，陕西西安 710048
  2.西安理工大学水利水电学院，陕西西安 710048
- 作者简介：
- 基金信息：
- DOI：10.11949/0438-1157.20260821
  CLC： TH313
- Received：14 June 2026，
  
  Revised：2026-08-28，
  
  Accepted：28 August 2026，
- 稿件说明：
移动端阅览
WU Guangkuan, JIA Dingmao, GE Zhenguo, et al. Effect of diffuser vane surface fouling on gas phase distribution uniformity in a gas–liquid multiphase pump[J/OL]. CIESC Journal, 2026.
DOI：

WU Guangkuan, JIA Dingmao, GE Zhenguo, et al. Effect of diffuser vane surface fouling on gas phase distribution uniformity in a gas–liquid multiphase pump[J/OL]. CIESC Journal, 2026. DOI： 10.11949/0438-1157.20260821.

摘要

针对气液混输泵在输送高黏度、多相混合介质时导叶流道极易形成堆积物和气相聚并导致流道堵塞、压升骤降等问题，本研究借鉴堆积位置对泵导叶叶片的中部至出口段进行均匀加厚。结合多相流数值模拟方法，引入群体平衡模型定量解析多尺度气泡动力学行为，揭示导叶表面积垢对泵内气相分布的影响规律。结果表明：在相同工况下，叶片表面积垢使泵的压升和效率分别提高了1.0 kPa和3.1%，导叶内气体体积分数大幅降低10.46%；多维分区评价显示，导叶轮毂低速区的严重气堵得到有效缓解，气相在轴向和径向空间上由“局部高浓度堆积”向“多区域离散分布”转变，成功消除了高浓度气团，径向气相分布均匀性提高近20%；此外，湍流熵产和界面熵产分别减少了约20%和6%，导叶处的熵产较原叶片模型大幅降低约30%。该研究证实了导叶叶片加厚设计的可行性，为高含气率工况下多相泵导叶优化设计提供了有效路径。

Abstract

To address the issues of severe accumulation and gas-phase coalescence in the diffuser flow passages in a gas–liquid multiphase pump when handling high‑viscosity

multiphase mixtures—which can lead to flow channel blockage and sudden pressure rise drop—this study draws on the accumulation location to apply a uniform thickening to the diffuser vanes from the mid‑span to the outlet section. Combined with multiphase flow numerical simulation and the introduction of a population balance model

the multi‑scale bubble dynamics are quantitatively analyzed to reveal the influence of diffuser vane surface fouling on the gas phase distribution within the pump. The results show that under the same operating conditions

vane surface fouling increases the pump pressure rise and efficiency by 1.0 kPa and 3.1%

respectively

while the gas volume fraction in the diffuser is significantly reduced by 10.46%. Multi‑zonal evaluation indicates that the severe gas blockage in the low‑velocity region near the diffuser hub is effectively alleviated; the gas phase transitions from “local high‑concentration accumulation” to “multi‑region discrete distribution” in both axial and radial spaces

successfully eliminating high‑concentration gas clusters and improving radial gas phase distribution uniformity by nearly 20%. In addition

turbulent entropy production and interfacial entropy production are reduced by 20% and 6%

respectively

and the total entropy production at the diffuser is decreased by about 30% compared with the original model. This study confirms the feasibility of the diffuser vane fouling design and provides an effective approach for the optimized design of diffuser vanes in multiphase pumps under high gas volume fraction conditions.

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references

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