农业机械学报2024，Vol.55Issue(5)：167-175,9.DOI:10.6041/j.issn.1000-1298.2024.05.015
基于涡分析的旋涡泵内流动能量转换特性研究
Energy Conversion Characteristics of Flow in Vortex Pump Based on Vortex Analysis
摘要
Abstract
With the aim to study the characteristics of complex vortices in the vortex pump,quantify the volume and intensity of vortices in pump,and analyze the influence of vortex structure on energy conversion and energy loss,the unsteady numerical simulation and external characteristic experiments were carried out to analyze the single-stage vortex pump,the Ω method,and Liutex method were used to identify and characterize the intensity of vortex in the pump,the average vortex intensity was proposed for the quantitative study,and the analysis was carried out by combining the vortex dynamics decomposition formula of kinetic energy equation and the vortex decomposition theory.The results showed that there was a spiral vortex structure in the fully developed vortex region of the pump,which flowed out from the impeller channel into the side channel.With the increase of flow rate,the number of vortex tubes was decreased and the vortex strength was decreased.With the increase of flow rate,the volume and intensity of the vortex in the impeller was decreased,while the relative change in the side channel was relatively small.The average vortex intensity in the impeller was much greater than that in the side channel under the same working conditions.Pressure gradient contributed the most to the kinetic energy conversion of fluid,and the proportion of momentum transport and dissipation loss caused by vortex structure was small,but the rigid vorticity,that was,the strength of vortex structure,was positively related to momentum transport,while the deformed vorticity was strongly related to the energy loss of enstrophy.关键词
旋涡泵/旋涡/Ω方法/Liutex方法/拟涡能Key words
vortex pump/vortex/Ω method/Liutex method/enstrophy分类
机械制造引用本文复制引用
杨伟峰,张人会,杨鸿德,陈学炳..基于涡分析的旋涡泵内流动能量转换特性研究[J].农业机械学报,2024,55(5):167-175,9.基金项目
甘肃省优秀博士生项目(22JR5RA236)、国家自然科学基金项目(51979135)、甘肃省重点研发计划项目(21YF5GA077)和甘肃省教育厅双一流重点项目(057047) （22JR5RA236）
