基于VOF模型研究相邻叶片交错角对水车性能的影响  

Exploring the Effect of Blade Interlacing Angle on Waterwheel Performance Based on VOF Model

作　　者：杨春霞[1] 李倩 胡雪原 郑源[1] 苏圣致 饶天华 YANG Chun-xia;LI Qian;HU Xue-yuan;ZHENG Yuan;SU Sheng-zhi;RAO Tian-hua(College of Energy and Electrical Engineering,Hohai University,Nanjing 211100,Jiangsu Province,China;Aerosun Corporation,Nanjing 211100,Jiangsu Province,China)

机构地区：[1]河海大学能源与电气学院,江苏南京211100 [2]航天晨光股份有限公司,江苏南京211100

出　　处：《中国农村水利水电》2023年第9期191-195,202,共6页China Rural Water and Hydropower

基　　金：国家重点研发计划政府间国际科技创新合作重点专项(2019YFE0105200);中央高校基本科研业务费项目(B210202060)。

摘　　要：为了探究影响3叶片下击式水车性能的因素,利用流体体积(VOF)模型模拟明渠无压流动,基于SST k-ω湍流模型、PISO算法及滑移网格旋转模型对相邻叶片不同交错角度(0°、20°、40°、60°)的水车进行非定常模拟。计算结果表明:当相邻叶片交错角度为0°时,对应的水车高效区最为宽广且最优效率最高,叶轮前后区域压力基本呈对称分布;随着交错角度增加,前后压力分布差异逐渐变大。相同工况下,旋转一周水车转矩的平均值从小到大依次为60°、40°、20°、0°,但不稳定性也依次增大。此外,水车的效率随叶尖速比的增加呈现先增大后减小的趋势;转矩的波动幅度随叶尖速比的减小而降低。To investigate the factors affecting the performance of the 3-blade undershot waterwheel,this paper uses VOF model to simulate the unpressurized flow in the open channel,and the waterwheel with different interlacing angles(0°,20°,40°,60°)of adjacent blades is simulated non-constantly based on the SST k-ωturbulence model,PISO algorithm and slip-grid rotation model.The results show that when the interlacing angle of adjacent blades is 0°,the corresponding waterwheel has the widest and highest efficiency,and the pressure in the front and rear areas of the impeller is basically symmetrical distribution.As the interlacing angle increases,the difference between the front and rear pressure distribution gradually becomes larger.Under the same working condition,the average value of waterwheel torque for one cy⁃cle of rotation is 60°,40°,20°and 0°in the order of small to large,but the instability also increases in order.In addition,the efficiency of the waterwheel shows a increasing and then decreasing trend with the increase in the blade tip speed ratio;the fluctuation of torque decreases with the decrease in the blade tip speed ratio.

关 键 词：下击式水车 超低水头发电 相邻叶片交错角 叶尖速比 VOF模型 

分 类 号：TK37[动力工程及工程热物理—热能工程] S277.9[农业科学—农业水土工程]