多相混输泵叶轮不同区域增压性能  

Pressurization performance of different areas within multiphase pump impeller

作　　者：史广泰[1] 王志文[1] SHI Guangtai;WANG Zhiwen(Key Laboratory of Fluid and Power Machinery,Ministry of Education,Xihua University,Chengdu,Sichuan 610039,China)

机构地区：[1]西华大学流体及动力机械教育部重点实验室,四川成都610039

出　　处：《排灌机械工程学报》2019年第1期13-17,共5页Journal of Drainage and Irrigation Machinery Engineering

基　　金：中国博士后科学基金特别资助项目(2017T100077);四川省教育厅科研项目(重点项目)(172470);西华大学流体及动力机械教育部重点实验室开放课题项目(szjj2016-004)

摘　　要：为了改善多相混输泵叶轮域的增压性能,提高混输泵叶轮的做功能力,选用标准的k-ε湍流模型,分别在纯水条件不同流量下和设计流量不同含气率下进行了数值计算,对多相混输泵叶轮不同区域的增压性能展开了研究.结果表明:从叶轮进口到出口,各级叶轮叶片工作面和吸力面压差大的区域主要集中在叶轮的前半段,且在叶轮前半段,越靠近轮缘,叶轮的增压性能越强,越靠近轮毂,叶轮的增压性能越弱,在叶轮后半段,越靠近轮缘,叶轮的增压性能越差,越靠近轮毂,叶轮的增压性能越强;在不同流量下,随着流量的增大,叶片工作面和吸力面的压差逐渐减小,流量对叶轮前半段叶轮叶片工作面和吸力面压差的影响先增大后减小,流量对叶轮后半段叶轮叶片工作面和吸力面压差的影响逐渐减小;在不同含气率下,含气率越高,对混输泵叶轮的增压性能影响越大,且随着含气率的升高,叶片工作面和吸力面压差下降越快.研究结果对多相混输泵叶轮的进一步优化设计提供重要的理论依据.In order to improve the performance and enhance the working capability of the impeller within a multiphase pump,the pressurization performance of a multiphase pump impeller was investigated under different flow rates and gas volume fractions with the standard k-ε turbulence model. It is shown that the position with a large pressure difference across blade pressure and suction sides is located in the first half portion of blade from the blade leading edge,especially the closer to the impeller rim the first half portion is,the stronger the pressurization performance is. In the second half portion of blade,the closer to the rim the portion is,the poorer the pressurization performance is. At different flow rates,from the impeller inlet to the outlet,as the flow rate increasing,the pressure difference across blade pressure and suction sides decreases gradually. At different gas volume fractions,the higer the gas volume fraction,the greater the effect of gas fraction on the pressurization performance of theimpeller. Further,with gas volume fraction increasing,the pressure difference drops off faster. These results provide an important theoretical basis to further design for multiphase pump impellers.

关 键 词：多相混输泵 多工况 增压性能 旋涡 数值计算 

分 类 号：TH311[机械工程—机械制造及自动化] S277.9[农业科学—农业水土工程]