前置宽体竖井进水流道水泵装置特性  

Characteristics of pump systems designed for inlet channel of anterior wide-body vertical shaft

作　　者：陈加琦 周正富 施伟 倪春 鲁健 于贤磊 肖正友 CHEN Jiaqi;ZHOU Zhengfu;SHI Wei;NI Chun;LU Jian;YU Xianlei;XIAO Zhengyou(College of Electrical,Energy and Power Engineering,Yangzhou University,Yangzhou,Jiangsu 225127,China;Xuzhou Branch of South-to-North Water Transfer East Route Project Jiangsu Water Source Co.,Ltd.,Xuzhou,Jiangsu 221200,China)

机构地区：[1]扬州大学电气与能源动力工程学院,江苏扬州225127 [2]南水北调东线江苏水源有限责任公司徐州分公司,江苏徐州221200

出　　处：《排灌机械工程学报》2025年第1期9-16,共8页Journal of Drainage and Irrigation Machinery Engineering

基　　金：国家自然科学基金资助项目(51076136);江苏省水利科技重点项目(2009053)。

摘　　要：为解决水泵机组设备布置与泵装置性能优化之间的矛盾,提出宽体竖井设计方法.基于三维湍流数值计算方法和熵产理论,比较了宽体竖井进水流道与2个常见的尖锥形竖井进水流道的水力特性.设计制作宽体竖井进水流道水泵装置模型,并试验测试5个叶片角下泵装置的能量特性、空化特性和飞逸特性.结果表明:宽体竖井方案与其他2个方案的内流场相似,在设计流量工况下流速均匀度均为95%左右,加权平均角度均大于89°;不同流量工况下,3种方案水力损失均接近,竖井前段熵产仅占后段的7.470%,竖井前段宽体型线对流道能量耗散无影响;当叶片角为0°时,水泵装置效率最高达79.19%;5个叶片角的泵装置临界空化余量均小于6.0 m;当叶片角为-6°时,扬程为2.36 m的最大飞逸转速为278.6 r/min;宽体竖井的水力特性与常规竖井相近,具有可同时满足设备布置与泵装置性能需求的特点.To address the discrepancy between the spatial arrangement of pump unit equipment and the optimization of pump device performance,a novel design approach utilizing a wide-body vertical shaft was proposed.Utilizing the three-dimensional turbulence numerical calculation method in conjunction with entropy production theory,the hydraulic characteristics between a wide-body vertical shaft inlet channel and two conventional conical vertical shaft inlet channels were compared.A prototype of a wide-body vertical shaft inlet water pump was developed and fabricated,and its energy performance,cavitation behavior,and runaway characteristics across five different blade angles were evaluated.The findings indicate that the internal flow field of the wide-body vertical shaft configuration closely resembles that of the other two configurations,exhibiting a flow velocity uniformity of approximately 95%and a weighted average angle exceeding 89°under the design flow conditions.The hydraulic losses remain consistent across different flow conditions,with entropy production in the front section of the vertical shaft constituting merely 7.470%of that observed in the rear section.Moreover,the broad profile of the front section of the vertical shaft does not influence the energy dissipation within the flow channel.At a blade angle of 0°,the water pump device achieves an efficiency of up to 79.19%.The critical cavita-tion margin for the pump device with five different blade angles is below 6.0 m.At a blade angle of-6°,the maximum runaway speed,with a head of 2.36 m,is 278.6 r/min.The hydraulic characteristics of wide-body vertical shafts closely resemble those of traditional vertical shafts,while also posses-sing the capability to concurrently satisfy the demands of equipment configuration and pump device performance.

关 键 词：竖井贯流泵站 进水流道 宽体竖井设计 数值计算 模型试验 

分 类 号：S277.9[农业科学—农业水土工程] TV131.4[农业科学—农业工程]