基于CFD的斜三通管水力特性分析及流场计算  

Hydraulic characteristics analysis and flow field calculation of inclined tee pipes based on CFD

作　　者：许虎 吴文勇 王振华[1] 王秋良[3] XU Hu;WU Wenyong;WANG Zhenhua;WANG Qiuliang(College of Water Conservancy and Architectural Engineering,Shihezi University,Shihezi,Xinjiang 832000,China;China Institute of Water Resources and Hydropower Research,Beijing 100048,China;Guanghuiyuan Environment Water Corporation,Shenzhen,Guangdong 518000,China)

机构地区：[1]石河子大学水利建筑工程学院,新疆石河子832000 [2]中国水利水电科学研究院,北京100048 [3]深圳市广汇源环境水务有限公司,广东深圳518000

出　　处：《排灌机械工程学报》2020年第11期1138-1144,共7页Journal of Drainage and Irrigation Machinery Engineering

基　　金：“十三五”国家重点研发计划项目(2017YFC0403205);国家科技支撑计划项目(2015BAD20B00,2016YFC0400102)。

摘　　要：为探究不同出口夹角下的斜直三通管水力特性,揭示水流所受重力作用下不同入口雷诺数、斜直三通管主管与支管间夹角、局部水头损失系数三者之间相关关系,阐明斜直三通管内部流场分布情况.采用Solidworks 2016对不同夹角斜三通管建立物理模型,利用ANSYS 18.0软件进行网格划分与数值计算,运用Tecplot软件进行后处理.结果表明:ζ13,ζ12均随着雷诺数的增加呈现降低趋势,且在雷诺数大于127616之后呈现缓慢降低趋势;ζ13随着三通管夹角的增加呈现增大趋势,ζ12随着三通管夹角的增大呈现降低趋势;在相同雷诺数下,压力云图在夹角小于90°时分布较为均匀,夹角大于90°时开始出现低压区;速度云图和流线图均随着夹角的增大呈现紊乱和不规则分布;湍流强度随着夹角的增大呈现增大趋势.在实际生产应用中应尽量减少三通管夹角的大小以减少能量损失,提高过流能力.The flow field in inclined straight tee pipes under the action of gravity was simulated by using ANSYS Fluent 18.0 to explore the hydraulic characteristics of the pipes at different inclination angles,and reveal the correlation among inlet Reynolds number,inclination angle between main pipe and branch pipe and local head loss coefficient.The physical models of the tee pipes with different inclination angles were established in Solidworks 2016,the mesh in the fluid domain was generated by ANSYS 18.0 meshing module,and the flow visualization was done in Tecplot software.The results showed thatζ13 andζ12 increased with increasing Reynolds number,but after the Reynolds number is larger than 127616,they decrease slowly.ζ13 shows an increasing tendency,butζ12 exhibits the ten-dency of decrease with increasing tee inclination angle.At the same Reynolds number,when the inclination is less than 90°,the pressure is more evenly distributed,when the angle is greater than 90°,a low-pressure zone starts to appear.The velocity contours and streamlines are disordered and present irregular patterns with increasing inclination angle.The turbulence intensity increases with increasing inclination angle.In practical production and application,the inclination angle of inclined straight tee pipes should be designed as small as possible to reduce energy loss and improve flow capacity.

关 键 词：三通管 夹角 数值模拟 水力特性 局部阻力系数 

分 类 号：S277.9[农业科学—农业水土工程]