导流式输水管网消能装置设计与影响因素研究  

Energy Dissipation Device Design and Influencing Factors of Diversion Water Transmission Network

作　　者：喻黎明[1] 张玉胜 崔吉林 李娜 杨汶翰 郝志铭 YU Liming;ZHANG Yusheng;CUI Jilin;LI Na;YANG Wenhan;HAO Zhiming(Faculty of Modern Agricultural Engineering,Kunming University of Science and Technology,Kunming 650500,China;Southwest Nonferrous Kunming Exploration Surveying and Designing(Institute)Co.,Ltd.,Kunming 650217,China;Yunnan Point Run Water Saving Equipment Manufacturing Co.,Ltd.,Kunming 650600,China)

机构地区：[1]昆明理工大学现代农业工程学院,昆明650500 [2]西南有色昆明勘测设计(院)股份有限公司,昆明650217 [3]云南点润节水设备制造有限公司,昆明650600

出　　处：《农业机械学报》2023年第6期319-327,共9页Transactions of the Chinese Society for Agricultural Machinery

基　　金：国家自然科学基金项目(52269011)。

摘　　要：为了保障山区输水管网运行安全,设计导流式输水管网消能装置。装置由上壳体、消能空腔和下壳体组成,设置入口端和出口端,消能空腔内设有均匀间隔的消能板和导流孔。采用Fluent数值模拟和验证试验对试验方法进行验证,设置3种入口流速、3种导流孔径比例和有无导流片开展全因素试验,并对2种导流孔直径进行消能率对比试验。结果表明:在保证过流能力下,入口流速和导流孔径均对消能率起主导作用,入口流速越大,即流量越大,消能率越好。消能率与导流孔径负相关,导流孔径越小越有利于消能。当基础孔径相同时,为同时满足过流能力且确保消能达到较好效果,建议选择导流孔径比例保持不变布置方式。入口流速为1.0 m/s时,局部水头损失占总水头损失的96.3%,所以当计算总水头损失时,可以忽略沿程水头损失。当入口流速小于4.0 m/s时,选择不安装导流片,达到4.0 m/s时,有无导流片消能率基本持平,大于5.0 m/s后,选用安装导流片消能效果更优。In order to ensure the safety of mountain water transmission network,the diversion type energy dissipation device was designed.The device was composed of an upper shell,an energy dissipation cavity and a lower shell,which was provided with an inlet end and an outlet end.The energy dissipation cavity was provided with an evenly spaced energy dissipation plate and a diversion hole.Fluent numerical simulation and experiments were used to verify the test method.Three inlet velocity rates,three diversion aperture ratios and the presence or absence of diversion plates were set to carry out all⁃factor tests,and energy dissipation rate comparison tests were carried out on the diameters of two diversion holes.The results showed that under the guarantee of overflow capacity,the inlet velocity and diversion aperture both played a leading role in energy dissipation rate.The larger the inlet velocity was,the larger the flow rate was,the better the energy dissipation rate would be.The energy dissipation rate was negatively correlated with the diversion aperture,and the smaller the diversion aperture was,the better the energy dissipation was.When the base aperture was the same,in order to satisfy the overflow capacity at the same time and ensure the dissipation of energy to achieve a better effect,it was recommended to choose the diversion aperture ratio unchanged arrangement.When the inlet velocity was 1.0 m/s,the local head loss accounts was 96.3%of the total head loss,so when calculating the total head loss,frictional head loss can be ignored.When inlet velocity was less than 4.0 m/s,when choosing not to install the deflector,it can be up to 4.0 m/s,the presence of deflector dissipation was flat,when it was more than 5.0 m/s,the effect was better when choosing to install deflector energy dissipation.

关 键 词：山区 输水管网 消能板 导流孔 消能空腔 导流片 

分 类 号：S275.6[农业科学—农业水土工程]