流体机械

2018, v.46;No.552(06) 27-32+4

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轴流泵装置中侧壁漩涡特性及消涡研究
Research on the Characteristics of Sidewall Vortex and Vortex Elimination in Axial-flow Pump

宋希杰;刘超;罗灿;雷镇;
SONG Xi-jie;LIU Chao;LUO Can;LEI Zhen;Yangzhou University;

摘要(Abstract):

对轴流泵开敞式进水池中侧壁漩涡展开研究,在进水池侧壁漩涡发生位置设置不同形式的消涡立柱,采用ANSYS CFX软件对不同方案进行了CFD数值计算,对比了不同方案下轴流泵装置的外特性、叶轮进口断面流速分布均匀度、侧壁漩涡分布及进水池水力损失。结果表明:在进水池侧壁处增加圆形消涡立柱和纵向椭圆消涡立柱的2种方案中进水池中侧壁漩涡消涡效果明显,最高效率相比原方案分别提高了0.92%和0.66%,叶轮进口断面面积加权流速均匀度相对于原方案分别提高了2.3%和4.4%,并且2种方案中进水池内的水力损失相对于原方案进水池内的水力损失分别减小了3.2%和4.1%。研究结果对进水结构中侧壁漩涡的消涡提供一定的参考。
The vortex expansion on the sidewall of the open type water intake tank was researched for the axial flow pump. Different forms of vortex-eliminating columns were set up at the position of vortex generation on the sidewall of water intake tank. The CFD numerical calculation of different schemes was carried out using the ANSYS CFX software. The external characteristics of the axial flow pump,the flow velocity distribution uniformity on the inlet section of the impeller,the vortex distribution on the sidewall and the hydraulic loss of the intake tank under different schemes were compared. The results show that: in the two schemes in which circular vortex-eliminating columns on the sidewall of the water intake tank and vertical elliptical vortex-eliminating columns are added,the vortex elimination effect of the sidewall of the intake tank was obvious,its highest efficiency was increased by 0.92% and 0.66% respectively compared to that of the original scheme,the weighted flow velocity uniformity of the inlet section area of the impeller was increased by 2.3% and 4.4% respectively compared to the original scheme,and the hydraulic loss of the intake tanks in the two schemes was reduced by 3.2% and 4.1% respectively compared to that in the original scheme. The research results provide some reference for the vortex elimination of the sidewall vortex in the water intake structure.

关键词(KeyWords): 轴流泵;侧壁漩涡;进水池;消涡
axial flow pump;sidewall vortex;water intake tank;vortex elimination

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目(51279173,51609210);; 江苏省水利科技项目(2017031);; 江苏省研究生科研创新工程项目(KYCX17_1881);; 江苏高校优势学科建设工程资助项目(PAPD);; 江苏省高校自然科学研究面上项目(17KJD580003)

作者(Author): 宋希杰;刘超;罗灿;雷镇;
SONG Xi-jie;LIU Chao;LUO Can;LEI Zhen;Yangzhou University;

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