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余隙容积对油气多相往复泵内部流动特性及输出性能的影响

Effect of clearance volume on the internal flow characteristics and output performance of oil-gas multiphase reciprocating pump.

作者信息

Jing Xuemin, Wang Yongqi, Zhang Xuefeng, Wei Xiuting

机构信息

Department of Mechanical and Electrical Engineering, Qingdao University of Technology, Qingdao, 266520, China.

Weihai Yinxing Prestressed Wire Co., Ltd, Weihai, 264200, China.

出版信息

Sci Rep. 2024 Oct 9;14(1):23580. doi: 10.1038/s41598-024-73442-4.

DOI:10.1038/s41598-024-73442-4
PMID:39384875
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11464732/
Abstract

In the production of oil and natural gas, excessive clearance volume is an important factor affecting the normal operation of oil-gas multiphase pump. Currently, little research has been conducted on the effect of clearance volume on the output characteristics of multiphase pump at home and abroad, leading to extremely low efficiency in the field application of multiphase pump. Therefore, this study conducted numerical calculations on the internal flow characteristics and output performance of multiphase pump under different clearance volumes using FLUENT software. Results show that pressure and fluid velocity gradually decrease as the clearance volume increases. Simultaneously, the number and intensity of vortex flow gradually increase, media pressurization speed becomes slower, and the lag angle of the discharge valve opening becomes larger. Moreover, under conditions with a higher gas volume fraction, multiphase pump with larger clearance volumes experiences gas locking. Furthermore, this study provides a theoretical basis for the reasonable design of clearance volume for multiphase pump by drawing a relationship curve between gas volume fraction and clearance volume. These research findings can provide theoretical support for the performance optimization and design improvement of multiphase pumps.

摘要

在石油和天然气生产中，过大的间隙容积是影响油气混输泵正常运行的一个重要因素。目前，国内外关于间隙容积对混输泵输出特性影响的研究较少，导致混输泵在现场应用中的效率极低。因此，本研究利用FLUENT软件对不同间隙容积下混输泵的内部流动特性和输出性能进行了数值计算。结果表明，随着间隙容积的增大，压力和流体速度逐渐降低。同时，涡流的数量和强度逐渐增加，介质增压速度变慢，排出阀开启的滞后角变大。此外，在高气液比条件下，间隙容积较大的混输泵会出现气锁现象。此外，本研究通过绘制气液比与间隙容积的关系曲线，为混输泵间隙容积的合理设计提供了理论依据。这些研究结果可为混输泵的性能优化和设计改进提供理论支持。

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