空化对多级液力透平叶片压力脉动影响的数值模拟  

The Influence of Cavitation on Pressure Pulsation of Multistage Centrifugal Pump as Turbine Based on Numerical Simulation

作　　者：苏明 李佳忆 史春艳 董栖君 岳添漆 曾鹏升 SU Ming;LI Jia-yi;SHI Chun-yan;DONG Xi-jun;YUE Tian-qi;ZENG Peng-sheng(Institute of Safety,Environmental Protection and Technical Supervision,Southwest Oil&Gas Field Company,PetrolChina,Chengdu 610056,China;Key Laboratory of Shale Gas Evaluation and Exploitation of Sichuan Province,Chengdu 610213,China;Guizhou Pipeline Co.,Ltd.,National Pipeline Group Southwest Pipeline Co.,Ltd.,Chengdu 610095,China;CNPC Southwest Oil and Gas Field Company Chuanbei Gas Mine,Chengdu 610056,China)

机构地区：[1]中国石油西南油气田分公司安全环保与技术监督研究院,四川成都610056 [2]页岩气评价与开采四川省重点实验室,四川成都610213 [3]国家管网集团西南管道有限责任公司贵州省管网有限公司,四川成都610095 [4]中国石油西南油气田分公司川东北气矿,四川成都610056

出　　处：《液压气动与密封》2024年第11期44-51,共8页Hydraulics Pneumatics & Seals

摘　　要：为研究空化对多级离心泵作液力透平叶片压力脉动的影响,通过非定常数值计算多级液力透平整机,研究最优工况下末级叶轮中空泡形态变化,分析不同空化程度下末级叶轮叶片上压力脉动变化规律。结果表明:不同空化系数下多级离心泵作液力透平在末级叶轮内产生翼型空化和漩涡空化产生的不稳定流动,导致叶片各监测点的主频幅值都在下降,并且叶片尾缘附近(监测点S4,P3)下降趋势更为严重。In order to study the effect of cavitation on the pressure pulsation of the blade of the multistage centrifugal pump as turbine,the unsteady numerical calculation of the multistage centrifugal pump as turbine was carried out to study the shape change of the hollow bubble of the final impeller under the optimal working condition,and the pressure pulsation on the blade of the final impeller under different cavitation degrees was analyzed.The results show that the unsteady flow caused by airfoil cavitation and vortex cavitation occurs in the final impeller under different cavitation coefficients,which results in the decrease of the main frequency amplitude at each monitoring point of the blade,and the decrease trend is more serious near the trailing edge of the blade(monitoring points S4 and P3).

关 键 词：多级液力透平 空化 叶片 压力脉动 

分 类 号：TH137[机械工程—机械制造及自动化] TH311