流体机械

2016, v.44;No.525(03) 1-5

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立式轴流泵装置流道内部流动特性及消涡试验
Analysis on the Vortex Flows and Vortex Suppression Schemes of Cube-type Inlet Passage for Pumping System

赵浩儒;杨帆;刘超;徐磊;许旭东;
ZHAO Hao-ru;YANG Fan;LIU Chao;XU Lei;XU Xu-dong;Yangzhou University;Water Resources Research Institute of Jiangsu Province;

摘要(Abstract):

采用数值计算和高速摄影技术研究分析了立式轴流泵装置的箱涵式进水流道水力特性,数值预测的附底涡与高速摄影捕捉到的附底涡均发生于喇叭管正下方,各工况时附底涡的运动轨迹较为一致,表明了数值计算的有效性。相比无消涡锥的进水流道,有消涡锥时进水流道出口断面的轴向速度分布均匀度平均提高了0.423%,速度加权平均角平均提高0.397°。设计的复合型消涡短锥可消除各工况运行时箱型进水流道附底区的涡带,提高泵装置运行的安全可靠性。对于箱涵式进水流道,为保证泵装置的安全稳定运行,需在流道附底区设置消涡装置。
In order to analyze the hydraulic characteristics of the cube-type inlet passage,numerical simulation and high-speed photography had been done. Submerged vortex occurs under the flare tube. Submerged vortex trajectory of an inlet passage was captured successfully based on a numerical simulation,which is the same as the observed results by high-speed photography. The numerical simulation prediction results are effective. Compared with the cube-type inlet passage without vortex-elimination device,the axial velocity distribution uniformity at the exit section of suction passage was improved by 0. 423% averagely,and the velocity-weighted average swirl increased by 0. 397° averagely in different operating conditions. New vortex-elimination devices with zigzag bar were designed,which can eliminate submerged vortex in different operating conditions. This research has an important engineering value for stable operation of pump stations with the cube-type inlet passage.

关键词(KeyWords): 泵装置;进水流道;附底涡;数值模拟;高速摄影
pumping system;inlet passage;submerged vortex;numerical simulation;high-speed photography

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基金项目(Foundation): 国家自然科学基金项目(51279173,51206139);; 江苏省自然科学基金项目(BK20150457);; 江苏省高校自然科学研究项目(14KJB 570003);; 扬州大学科技创新培育基金项目(2015CXJ033)

作者(Author): 赵浩儒;杨帆;刘超;徐磊;许旭东;
ZHAO Hao-ru;YANG Fan;LIU Chao;XU Lei;XU Xu-dong;Yangzhou University;Water Resources Research Institute of Jiangsu Province;

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