低温液态CO_(2)增压泵全流道匹配的多目标优化  

Multiple objective optimization for full channel matching of low-temperature liquid CO_(2) booster pump

作　　者：马文生 祁炳 袁学平 黎义斌[2,3] 杨由超 MA Wensheng;QI Bing;YUAN Xueping;LI Yibin;YANG Youchao(Chongqing Water Pump Factory Co.,Ltd.,Chongqing 400039,China;School of Energy and Power Engineering,Lanzhou University of Technology,Lanzhou 730050,China;Key Laboratory of Special Pump Valves and Flow Control Systems,Ministry of Education,Lanzhou 730050,China)

机构地区：[1]重庆水泵厂有限责任公司,重庆400039 [2]兰州理工大学能源与动力工程学院,甘肃兰州730050 [3]特种泵阀及流控系统教育部重点实验室,甘肃兰州730050

出　　处：《机电工程》2025年第2期195-204,共10页Journal of Mechanical & Electrical Engineering

基　　金：甘肃省自然科学基金资助项目(24JRRA214)。

摘　　要：在油田驱油工艺中,提高CO_(2)的压力和流量可以实现原油采收率的提升。针对驱油工艺系统的核心动力设备-低温液态CO_(2)增压泵在运行过程中存在效率偏低的问题,以一台典型多级低温液态CO_(2)离心泵为研究对象,基于泵的关键几何参数建立优化设计方案,进行了多工况的水力性能数值计算分析和实验结果分析。首先,采用ANSYS CFX软件对增压泵模型进行了数值模拟计算,并将计算结果与实验结果进行了对比分析;然后,以扬程和效率为优化指标,采用Box-Behnken Design方法,建立了增压泵主要过流部件关键几何参数的多目标优化设计方案;最后,对实验结果进行了分析,确定了各试验因素交互作用对实验的影响,并建立了最优实验模型,将其与原模型进行了性能对比分析。研究结果表明:叶片出口宽度对增压泵扬程的影响,以及叶片包角对增压泵效率的影响最明显,当叶片包角位于137°~142°,蜗壳进口宽度在34 mm左右,增压泵的效率最佳;采用全流道的参数的最佳匹配方案后,增压泵额定点的效率可提高0.22%。该研究结果可为低温液态CO_(2)增压泵的水力设计及性能优化提供技术指导。In the process of oil displacement in oilfield,increasing the pressure and flow rate of CO_(2) can improve the oil recovery.Aiming at the problem of low efficiency of the low-temperature liquid CO_(2) booster pump of the oil displacement process during operation,a typical multi-stage low-temperature liquid CO_(2) centrifugal pump was taken as the research object.Based on the key geometric parameters of the pump,an optimized design scheme was established,and numerical calculations and experimental results analysis of hydraulic performance under multiple conditions were carried out.Firstly,ANSYS CFX software was used to perform numerical simulation calculations on the booster pump model,and the calculated results were compared and analyzed with experimental results.Then,using head and efficiency as optimization indicators,a multiple objective optimization design scheme was established based on the Box Behnken Design(BBD) method for the key geometric parameters of the main flow components of the booster pump.Finally,the experimental results were analyzed to determine the impact of the interaction between various experimental factors,and the optimal experimental model was established for performance comparison with the original model.The research results show that the influence of the vane outlet width on the head of the booster pump and the vane wrap angle on the efficiency of the booster pump are most obvious,and the efficiency of the booster pump is optimal when the vane wrap angle is located at 137°~142° and the inlet width of the worm casing is at about 34 mm.The efficiency of the booster pump at the rated point is increased by 0.22% after adopting the optimal matching scheme of the parameters of the full flow channel,which provides technical guidance for the hydraulic design and optimization of the performance of the low-temperature liquid CO_(2) booster pump.

关 键 词：低温液态CO_(2)离心泵 Box-Behnken Design方法 几何参数 交互作用 扬程和效率 叶片出口宽度 叶片包角 

分 类 号：TH311[机械工程—机械制造及自动化] TE934.1[石油与天然气工程—石油机械设备]