水资源与水工程学报2024，Vol.35Issue(4)：111-118,8.DOI:10.11705/j.issn.1672-643X.2024.04.13
立式轴流泵装置内流瞬变特性数值分析
Numerical analysis of internal flow transient characteristics of the vertical axial-flow pump device
摘要
Abstract
In order to clarify the transient variation characteristics of the internal flow in the vertical axial-flow pump device,the computational fluid dynamics(CFD)is adopted to obtain the transient hydraulic characteristics of the blade area of the pump device under various operating conditions,and then the reli-ability of the numerical simulation is verified by a physical model test.The simulation results show that the area with large impeller inlet bias angle is mainly concentrated on the leading edge of the impeller.With the dynamic change of impeller rotation,the impeller outlet bias angle gradually increases from the hub to the rim,and the area with large guide vane outlet bias angle corresponds to the circumferential po-sition of guide vane trailing edge.Under 1.2Qbep condition,the uniformity of axial velocity distribution at impeller inlet is 89.5％,and the weighted average angle of velocity is 82.9°.When the flow rate increa-ses from 0.8Qbep to 1.2Qbep,the average velocity circulation at the guide vane outlet is reduced by 12.1％.In the range of 0.8Qbep-1.2Qbep,the minimum value of the average velocity circulation is 4.7 m2/s,at which time the flow rate is 1.2Qbep.The vortex structure characteristics at the outlet of the guide vane body is significant.The number of vortex structures from the inlet to the outlet of the guide vane body increases,but the vortex volume decreases,and the resultant velocity of the vortex structure decrea-ses significantly.关键词
轴流泵/泵装置/叶片/内流场/瞬态特性/数值分析Key words
axial-flow pump/pump device/blade/internal flow field/transient characteristics/numeri-cal analysis分类
机械制造引用本文复制引用
徐贵颖,王暴,王振华,栾逸,单秋雯,杨帆..立式轴流泵装置内流瞬变特性数值分析[J].水资源与水工程学报,2024,35(4):111-118,8.基金项目
江苏省高校自然科学研究重大项目(20KJA570001) （20KJA570001）
扬州市科技计划项目(YZ2022192) （YZ2022192）
江苏省水利科技项目(2022074) （2022074）
扬州大学"青蓝工程"项目(扬大人资[2023]40号) （扬大人资[2023]40号）
江苏省研究生科研与实践创新计划项目(SJCX24_2242) （SJCX24_2242）
