Investigation on gas-liquid two-phase flow centrifugal pump performances for different rotational speeds

Cui, Qianglei; R, Q; Bois, Gérard; Yuan, Shuxia; Yuan, Jianping

doi:10.1088/1755-1315/240/3/032016

Cited by 3 publications

(2 citation statements)

References 9 publications

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“…Results obtained by Murakami and Minemura [2] and Si et al [24], already presented in the previous section for design rotational speeds, are also added on Figures 3 and 4 (see additional information in Table 2). More analysis concerning combined effects of rotational speed and liquid flow rate, especially when the rotational speed decreases, can be found in Cui et al [27]. Thus, for further research, it is suggested to perform a deeper analysis using the corresponding Reynold number based on inlet and/or outlet impeller radii.…”

Section: Effect Of Rotational Speed For a Given Pump (Close To Nominamentioning

confidence: 99%

A Review of Design Considerations of Centrifugal Pump Capability for Handling Inlet Gas-Liquid Two-Phase Flows

et al. 2019

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Most of the pumps working under two phase flows conditions are used in petroleum industry applications, like electrical submersible pumps (ESP) for hydrocarbon fluids, in chemistry, nuclear industries and in agriculture for irrigation purposes as well. Two-phase flows always deteriorate overall pump performances compared with single flow conditions. Several papers have been published aiming to understand flow physics and to model all the main mechanisms that govern gas pocket formation and surging phenomena. These mechanisms depend on the pump type, the impeller geometry, the rotational speed, design and off-design liquid flow rate conditions, the volumetric gas fraction, the fluid properties and the inlet pressure. In the present paper, a review on two phase performances from various centrifugal pumps designs is presented, mainly based on experimental results. The main focus is devoted to detect the significant geometrical parameters that: (1) Modify the pump head degradation level under bubbly flow regime assumption; (2) Allow single stage centrifugal pumps keep working under two-phase flow conditions with high inlet void fraction values before pump shut down, whatever the pump performance degradations and liquid production rates should be. Because most of the published experimental studies are performed on dedicated laboratory centrifugal pump models, most of the present review is based on air-water mixtures as the working fluid with inlet pressures close to atmospheric conditions. The following review supposes that gas phase is considered as a non-condensable perfect gas, while the liquid phase is incompressible. Both phases are isolated from external conditions: neither mass nor heat transfer take place between the phases.

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Section: Effect Of Rotational Speed For a Given Pump (Close To Nominamentioning

confidence: 99%

A Review of Design Considerations of Centrifugal Pump Capability for Handling Inlet Gas-Liquid Two-Phase Flows

et al. 2019

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“…In engineering practice such as in chemical processes, oil and gas transportation, nuclear pump operating, loss of water accidents, etc. [1][2][3][4], the problem of gas-liquid mixed transportation with centrifugal pumps is often encountered. As the centrifugal pump is very sensitive to the gas content in the working medium, the pump performance will change significantly under the condition of gas-liquid mixed transportation [5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Effect of Short Blade Circumferential Position Arrangement on Gas-Liquid Two-Phase Flow Performance of Centrifugal Pump

et al. 2020

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In order to study the internal flow characteristics of centrifugal pumps with a split impeller under gas-liquid mixed transportation conditions, this paper conducted a steady calculation of the flow field in the centrifugal pump under the conditions of different inlet gas volume fractions based on the Eulerian-Eulerian heterogeneous flow model, using air and water as the working media and the Schiller Nauman model for the interphase resistance. This paper takes a low specific speed centrifugal pump as the research object, through the controlling variables, using the same pump body structure and pump body geometric parameters and setting three different arrangements of long and short blades (each plan uses the same long and short blades) to explore the influence of the short blade arrangement on the low specific speed centrifugal pump performance under a gas-liquid two-phase flow. The research results show that, under pure water conditions, the reasonable arrangement of the short blade circumferential position can eliminate the hump of the centrifugal pump under low-flow conditions, can make the flow velocity in the impeller more uniform, and can optimize the performance of the pump. Under the design conditions and the gas-liquid two-phase inflow conditions, when the circumferential position of the short blades is close to the suction surface of the long blades, some of the bubbles on the suction surface of the long blade can be broken under the work of the pressure surface of the short blade and flow out of the impeller with the liquid, which improves the flow state of the flow field in the impeller.

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CFD verification of total pressure loss coefficient for gas-liquid two-phase flow

Kawahara,

Feng,

Miyagawa

et al. 2024

J. Phys.: Conf. Ser.

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Traditionally, we design gas-liquid two-phase flow systems with pressure loss that is assumed by homogeneous flow. However, in real phenomena, the flow rate of water or air through a system cannot be correctly predicted unless we evaluate by the total pressure loss. there are currently few methods for measuring total pressure loss, and the value of total pressure loss is not yet clearly. Therefore, we devised a method to measure total pressure loss by pump Q-H characteristic and succeeded in measuring total pressure loss indirectly. We compared the test results with the analysis to clarify the prediction accuracy of the analysis using commercial codes. We apply three two-phase flow models for the simulation: a VOF model, a homogeneous flow model, and a two-fluid model. The simulation results of comparison between each fluid model indicated that the VOF model predicted with the best accuracy, with the error of 46% compared to the test results. This study provides a benchmark for the current commercial code, and the prediction accuracy of the different models provides a direction for future improvements in the analysis.

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Investigation on gas-liquid two-phase flow centrifugal pump performances for different rotational speeds

Cited by 3 publications

References 9 publications

A Review of Design Considerations of Centrifugal Pump Capability for Handling Inlet Gas-Liquid Two-Phase Flows

A Review of Design Considerations of Centrifugal Pump Capability for Handling Inlet Gas-Liquid Two-Phase Flows

Effect of Short Blade Circumferential Position Arrangement on Gas-Liquid Two-Phase Flow Performance of Centrifugal Pump

CFD verification of total pressure loss coefficient for gas-liquid two-phase flow

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