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作 者:韩锡镇 袁锐波[1,2] 朱正 梁松炜 覃学巨 HAN Xizhen;YUAN Ruibo;ZHU Zheng;LIANG Songwei;QIN Xueju(School of Mechanical and Electrical Engineering,Kunming University of Science and Technology,Kunming 650504,China;Institute of Hydromechatronics System Integration and Control,Kunming 650504,China)
机构地区:[1]昆明理工大学机电工程学院,昆明650504 [2]光机电液系统集成与控制研究所,昆明650504
出 处:《重庆理工大学学报(自然科学)》2023年第12期320-327,共8页Journal of Chongqing University of Technology:Natural Science
基 金:中国烟草总公司科技重点项目(110201402027);中泰国际技术转移中心项目(GHJD-2022001)。
摘 要:为探究不同三角形内齿齿顶角度对于迷宫流道灌水器的水力性能以及抗堵塞性能的影响,结合FLUENT数值模拟的方法,在梯形迷宫流道中加入三角形内齿结构,研究三角形内齿齿顶角度分别为-66.37°、-63.64°、-58.86°、-53.13°、60°、53.13°、58.86°、63.64°、66.37°(以60°为界,根据水流方向,顺时针为正,逆时针为负)的流道流速特性和堵塞成因。齿顶角为58.86°、63.64°和66.37°的低速区域相对较少;内齿齿顶角角度为60°、63.64°、66.37°流道时,涡旋区占比较大,涡旋区域位置合理;分析流道中不同粒径颗粒的运动情况,三角形内齿齿顶角角度为53.13°、58.86°、63.64°时,流道内颗粒即使出现涡旋周转运动,但滞留时间较短,运移轨迹也相对于更短,流道的抗堵塞性能提高显著。三角形齿顶角度对加内齿迷宫流道的水力性能和抗堵塞性能均有不同程度的影响,齿顶角度为63.64°的流道流速特性较好且最不易产生泥沙堵塞现象。This paper explores the effects of different triangular inner tooth top angles on the hydraulic performance and anti-blocking performance of emitters of labyrinth passage.Through FLUENT numerical simulation,the triangular inner tooth structure with the triangular inner tooth top angles of-66.37°,-63.64°,-58.86°,-53.13°,63.64°,66.37°(with 60°as the boundary,positive clockwise and negative counterclockwise)is added to the trapezoidal labyrinth channels to study the characteristics of the flow speed within the channels and the causes of the blockages.Results show there are relatively a few low speed areas with a tooth top angle of 58.86°,63.64°and 66.37°whereas the vortex area is relatively large and properly positioned when the inner tooth top angle reaches 60°,63.64°and 66.37°.An analysis of the motion of particles with different sizes in the channel reveals even if the particles in the channel have vortex turnover motion,the retention time is relatively short and the migration trajectory is relatively shorter when the tooth top angle of the triangle is 53.13°,58.86°and 63.64°.Thus,the anti-clogging performance of the channel improves significantly.The triangular tooth top angle has different effects on the hydraulic performance and anti-clogging performance of the labyrinth passage with inner teeth.The triangular inner tooth top angles have varied impacts on the hydraulic performance and anti-blocking performance of labyrinth passage with inner teeth.With a tooth top angle of 63.64°,the flow velocity characteristics in the labyrinth channels are superior and the sediment clogging is least likely to occur.
关 键 词:迷宫流道 内齿齿顶角 数值模拟 流速特性 抗堵塞
分 类 号:S275.6[农业科学—农业水土工程]
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