内齿位置对双向流道灌水器水力特性影响的数值模拟  

Numerical Simulation of the Influence of Inner Tooth Position on the Hydraulic Characteristics of Bidirectional Flow Channel Emitter

作　　者：于东平 李海洋 孙志勇 魏立山 YU Dong-ping;LI Hai-yang;SUN Zhi-yong(Shandong Survey and Design Institute of Water Conservancy Co.,Ltd.,Jinan,Shandong 250000;Dezhou Water Conservancy Bureau,Dezhou,Shandong 253000;China Construction Eighth Bureau First Construction Co.,Ltd.,Jinan,Shandong 250000)

机构地区：[1]山东省水利勘测设计院有限公司,山东济南250000 [2]德州市水利局,山东德州253000 [3]中建八局第一建设有限公司,山东济南250000

出　　处：《安徽农业科学》2024年第13期167-171,195,共6页Journal of Anhui Agricultural Sciences

基　　金：国家重点研发计划项目(2016YFC0402809);山东省省级水利科研与技术推广项目(SDSLKY201703)。

摘　　要：在双向流道灌水器加入1个或2个内齿,构成4种内齿相对位置不同的单内齿双向流道灌水器和4种内齿相对位置不同的双内齿双向流道灌水器,以此探求加入内齿前、后双向流道灌水器水力性能的优劣,对于每种灌水器,通过AutoCAD对灌水器流道进行三维建模,采用AnsysFluent对流道内部流体的流动状态进行水力性能模拟,计算流道的局部损失系数,同时通过回归分析获得其流量系数和流态指数。结果表明:改进型双向流道的局部损失系数为11.24~56.89,与原双向流道相比明显提高;改进型双向流道的流量系数均小于原双向流道,当单内齿位置在支流道入口上时,流态指数最优,相较于原双向流道降低了5.6%;内齿的位置可影响双向水流配比,进而影响水力性能,验证了主支流道不同流量比与水力性能的内在关系。该研究可为双向流道灌水器结构的优化、水力性能的提高提供参考。One or two inner teeth were added to the bidirectional flow channel emitter to form four kinds of single inner tooth bidirectional flow channel emitters with different relative positions of inner teeth and four kinds of double inner tooth bidirectional flow channel emitters with different relative positions of inner teeth,so as to explore the advantages and disadvantages of the hydraulic performance of the bidirectional flow channel emitters before and after the addition of inner teeth.For each emitter,the three-dimensional modeling of the flow channel of the emitter was carried out by AutoCAD,and the flow state of the fluid inside the flow channel was simulated by Ansys Fluent.The local loss coefficient of the flow channel was calculated,and the flow coefficient and flow index were obtained by regression analysis.The results show that the local loss coefficient of the improved bidirectional flow channel is 11.24-56.89,which is significantly higher than that of the original bidirectional flow channel.The flow coefficient of the improved bidirectional flow channel is smaller than that of the original bidirectional flow channel.When the single inner tooth is located at the inlet of the branch channel,the flow index is the best,which is 5.6% lower than that of the original bidirectional flow channel.The position of the inner tooth can affect the bidirectional flow ratio,which in turn affects the hydraulic performance,and verifies the internal relationship between the different flow ratios of the main and branch channels and the hydraulic performance.The research can provide reference for the structural optimization and hydraulic performance improvement of the bidirectional flow channel emitter.

关 键 词：灌水器 双向流道 内齿位置 数值模拟 水力特性 

分 类 号：S27[农业科学—农业水土工程]