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<p>The multiphase pump is used to address issues of high costs, low efficiency, and environmental pollution associated with traditional phase separation technology. This study uses computational fluid dynamics numerical simulations and field tests to investigate the internal flow characteristics of the pump for multiphase media under varying pressure differences, rotational speeds, clearances, and rotor blade numbers, employing dynamic mesh technology and the Eulerian multiphase flow model. Orthogonal experiments and response surface tests were conducted with volumetric efficiency and flow pulsation coefficient as response targets. The results indicate that the gas phase is primarily distributed along the rotor surfaces, while the solid phase tends to accumulate on the pump chamber walls. Increasing the number of pump chambers creates multiple buffer zones, reducing the impact of backflow. The number of torque peaks is positively correlated with the number of rotor blades. Higher pressure differentials improve pressure pulsation, whereas higher rotational speeds enhance flow pulsation. The order of influence of volume efficiency η is: meshing clearance (A) &gt; pressure difference&#xa0;(D) &gt; number of rotor blades (C) &gt; operating speed (B). The pump exhibits optimal efficiency when the parameters are set to a clearance of 0.15 mm, a speed of 1250 r/min, two rotor blades, and a pressure difference of 0.6 MPa. The goodness of fit for the volumetric efficiency model is R<sup>2</sup> = 0.9655 and the adjusted R<sup>2</sup> = 0.9310. For the flow pulsation coefficient model, R<sup>2</sup> = 0.9048 and the adjusted R<sup>2</sup> = 0.8096. The coefficient of variation (C.V.) for both models is ≤ 5.72%, and the signal-to-noise ratio (S/N) is ≥ 11.65. Through a quadratic polynomial regression model, the optimal solution for the pump under the interaction of multiple factors can be effectively predicted. This research provides guidance for the multi-phase boosting performance and structural improvements of the multiphase rotor pump under different performance parameters. </p>

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Analysis and Optimization of Gas–Liquid–Solid Multiphase Flow Characteristics in Multiphase Pumps

  • 期刊论文

  • 发表日期：

    2025年8月29日

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  • Meiling Wang,
  • Zhiqiang Huang,
  • Junjie Wang,
  • Weiji Qian,
  • Shidong Cheng

摘要

The multiphase pump is used to address issues of high costs, low efficiency, and environmental pollution associated with traditional phase separation technology. This study uses computational fluid dynamics numerical simulations and field tests to investigate the internal flow characteristics of the pump for multiphase media under varying pressure differences, rotational speeds, clearances, and rotor blade numbers, employing dynamic mesh technology and the Eulerian multiphase flow model. Orthogonal experiments and response surface tests were conducted with volumetric efficiency and flow pulsation coefficient as response targets. The results indicate that the gas phase is primarily distributed along the rotor surfaces, while the solid phase tends to accumulate on the pump chamber walls. Increasing the number of pump chambers creates multiple buffer zones, reducing the impact of backflow. The number of torque peaks is positively correlated with the number of rotor blades. Higher pressure differentials improve pressure pulsation, whereas higher rotational speeds enhance flow pulsation. The order of influence of volume efficiency η is: meshing clearance (A) > pressure difference (D) > number of rotor blades (C) > operating speed (B). The pump exhibits optimal efficiency when the parameters are set to a clearance of 0.15 mm, a speed of 1250 r/min, two rotor blades, and a pressure difference of 0.6 MPa. The goodness of fit for the volumetric efficiency model is R2 = 0.9655 and the adjusted R2 = 0.9310. For the flow pulsation coefficient model, R2 = 0.9048 and the adjusted R2 = 0.8096. The coefficient of variation (C.V.) for both models is ≤ 5.72%, and the signal-to-noise ratio (S/N) is ≥ 11.65. Through a quadratic polynomial regression model, the optimal solution for the pump under the interaction of multiple factors can be effectively predicted. This research provides guidance for the multi-phase boosting performance and structural improvements of the multiphase rotor pump under different performance parameters.