农业节水灌溉球阀水流流动特性分析  

An Analysis of the Ball Valve Flow Characteristics of Saving-water Agriculture

作　　者：弋鹏飞 张健[2] 马奭文 张建鹏 YI Peng-fei;ZHANG Jian;MA Shi-wen;ZHANG Jian-peng(College of Physics Science and Technology, Yili Normal University, Yining 835000, Xinjiang, China;College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing 210098,China)

机构地区：[1]伊犁师范大学物理科学与技术学院,新疆伊宁835000 [2]河海大学水利水电学院,南京210098

出　　处：《中国农村水利水电》2019年第10期111-116,共6页China Rural Water and Hydropower

基　　金：伊犁师范大学校级科研项目(2015YSYB29);伊犁师范大学科研项目应用基础项目(2018YSJC01);国家自然科学基金项目(51379064);国家重点实验室开放基金项目(2013B116)

摘　　要：利用试验测量球阀稳态流动时的总压变化,通过数值模拟对试验球阀流场变化进行展示,数值模拟与试验吻合较好。数值模拟获得球阀在不同开度时的稳态局部阻力系数和流量系数,揭示球阀流场从小开度到大开度的湍流特征与局部阻力系数、流量系数变化的相互关系,归纳得到4种规格球阀的局部阻力系数及流量系数在不同开度下的数学表达式,结论可为节水灌溉管网的水力计算提供理论参考。This paper reveals the influence of flow field shape of irrigation ball valve on resistance coefficients and flow coefficients under different opening degree. The flow field of the ball value is displayed by numerical simulation. The steady water pressure of before and after value are measured by experiment. The numerical simulation adopted well with the experiment. The steady-state resistance coefficients and flow coefficients at different opening degree are calculated by CFD. The turbulence in ball valves from relatively small opening degree to large opening degree affects the local resistance coefficient and flow coefficients. The resistance coefficient and flow coefficient formulation of four kinds of ball valves are obtained by summarizing in test and simulation. This conclusion can provide a reference for saving-water agricultural pipe network hydraulic calculation.

关 键 词：湍流 流动特征 灌溉球阀 数值模拟 

分 类 号：TV93[水利工程—水利水电工程] S277.9[农业科学—农业水土工程]