多相混输泵的流场模拟及样机研制  

Flow simulation and prototype manufacturing of a multiphase pump

作　　者：黄书才 王元银 李磊 方威 陈道毅 HUANG Shucai;WANG Yuanyin;LI Lei;FANG Wei;CHEN Daoyi(Shenzhen Key Laboratory of Coastal Dynamics and Environmental Changes,Tsinghua Shenzhen International Graduate School,Shenzhen 518055,China)

机构地区：[1]清华大学深圳国际研究生院深圳市近海动力环境演变重点实验室,广东深圳518055

出　　处：《流体机械》2023年第5期29-33,共5页Fluid Machinery

基　　金：国家自然科学基金项目(21808122);广东省海洋经济发展(海洋六大产业)专项资金项目(GDOE[2021]55)。

摘　　要：针对天然气水合物合成系统试验回路中的气液混输问题,提出了一种轴流式多相混输泵的设计。基于N-S方程和SST k-ω湍流模型对该多相混输泵的内部流场进行数值模拟,对比分析了纯水和进口含气率为50%时外特性的差异,揭示了内部流动规律。结果表明,纯水和进口含气量为50%的状态下,扬程均随流量的增大而单调减小;效率均随流量的增大而先增大后减小,在同一流量点,纯水时的效率比进口含气量为50%工况下的效率高约1%;轴功率均随流量的增大而单调减小,在同一流量点,纯水时的轴功率约为进口含气量50%工况下的2倍。同时制作了样机,应用于天然气水合物合成系统的试验回路中,验证了该混输泵具有较强的气液混输能力。研制的多相混输泵可应用于天然气水合物合成系统试验回路中或者其他高压环境下的气液混输场景。For the problem of gas-liquid transportation in the test circuit of natural gas hydrate synthesis system,a design of axialflow multiphase pump was proposed.Based on N-S equation and SST k-ωturbulence model,numerical simulation of the internal flow was applied to the multiphase pump,the difference of external characteristics under different inlet gas volume fractions(IGVF=0 and IGVF=50%)was compared and analyzed,and the internal flow law was revealed.The results show that when IGVF=0 and IGVF=50%,the head decreases monotonously with the increase of flow rate;the efficiency increases first and then decreases with the increase of flow rate,and the efficiency when IGVF=0 is about 1%higher than that when IGVF=50%;the shaft power decreases monotonously with the increase of flow rate,and the shaft power when IGVF=0 is about two times of that when IGVF=50%.And the prototype was made and applied in the test circuit of natural gas hydrate synthesis system,and it was verified that the multiphase pump has strong gas-liquid transportation capacity.The multiphase pump developed can be used in the test circuit of natural gas hydrate synthesis system or other high-pressure gas-liquid transportation scenarios.

关 键 词：多相混输泵 数值模拟 外特性 样机 应用 

分 类 号：TH312[机械工程—机械制造及自动化]