Hydraulic characteristics analysis and flow field calculation of inclined tee pipes based on CFD
XU Hu1, WU Wenyong1,2*, WANG Zhenhua1, WANG Qiuliang3
1. College of Water Conservancy and Architectural Engineering, Shihezi University, Shihezi, Xinjiang 832000, China; 2. China Institute of Water Resources and Hydropower Research, Beijing, 100048, China; 3. Guanghuiyuan Environment Water corporation, Shenzhen, Guangdong 518000, China
Abstract：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 minor 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 that ζ1 and ζ12 are increased with increasing Reynolds number, but after the Reynolds number is larger than 127616, they decrease slowly. ζ13 shows an increasing tendencyf, but ζ12 exhibits the tendency 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°, however, a low-pressure zone starts to appear. The velocity contours and streamlines were 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.
许虎,吴文勇,*,王振华,王秋良. 基于CFD的斜三通管水力特性分析及流场计算[J]. 排灌机械工程学报, 2020, 38(11): 1138-1144.
XU Hu,WU Wenyong,*,WANG Zhenhua,WANG Qiuliang. Hydraulic characteristics analysis and flow field calculation of inclined tee pipes based on CFD. Journal of Drainage and Irrigation Machinery Engin, 2020, 38(11): 1138-1144.
