负压反馈射流喷头附壁点特性研究  

Characteristics of Wall Attachment Point of Negative Pressure Feedback Jet Nozzle

作　　者：杨凡 王新坤[1] 陈亚奇 贾宗瑾 武文婧 YANG Fan;WANG Xin-kun;CHEN Ya-qi;JIA Zong-jin;WU Wen-jin(Research Center of Fluid Machinery Engineering and Technology,Jiangsu University,Zhenjiang 212013,Jiangsu Province,China;Hunan Water Resources and Hydropower Survey,Design and Research Institute,Changsha 410007,Hunan Province,China)

机构地区：[1]江苏大学流体机械工程技术研究中心,江苏镇江212013 [2]湖南省水利水电勘测设计规划研究总院有限公司,湖南长沙410007

出　　处：《节水灌溉》2025年第2期78-84,共7页Water Saving Irrigation

摘　　要：为了探究基于附壁点位置的负压反馈射流喷头的设计方法,采用理论分析、数值模拟、正交试验、水力性能试验相结合的方法,找到了不同压力条件下结构参数对附壁点位置的影响规律,建立了通过结构参数计算附壁点位置的经验公式。结果表明:基于最优附壁点位置和经验公式计算出的负压反馈射流喷头最优结构参数为:位差s为1.9 mm、深宽比k/w为2、侧壁倾角β为8°、控制管宽度f为4 mm、弯曲过渡段曲率半径r为21 mm、劈距H为9 w。通过验证试验可得试验数据与模拟数据变化趋势均具有良好的一致性,且其偏差率均不高于8.4%,因此证明本文模拟精度有效可靠,该研究能够为负压反馈射流喷头科学研究、产品研发提供理论与技术支撑。In order to investigate the design method of negative pressure feedback jet nozzle based on the position of attachment point,this paper adopts the combination of theoretical analysis,numerical simulation,orthogonal test and hydraulic performance test to find out the influence law of the structural parameters on the position of the attachment point under different pressure conditions,and establishes the empirical formula for the calculation of the position of the attachment point by the structural parameters.The results show that:based on the optimal attachment point position and the empirical formula,the optimal structural parameters of the negative pressure feedback jet nozzle are as follows:the displacement s is 1.9 mm,the depth/width ratio k/w is 2,the side wall inclination angleβis 8°,the width of the control tube f is 4 mm,the radius of curvature of the bending transition section r is 21 mm,and the splitting distance H is 9 w.Through the validation test,we can get that the experimental data and the simulation data have good consistency and the deviation rate is 0.5 mm.Through the validation test,the experimental data and simulation data have good consistency,and the deviation rate is not higher than 8.4%,so it proves that the simulation accuracy of this paper is effective and reliable.This study can provide theoretical and technical support for the scientific research and product development of the negative pressure feedback jet nozzle.

关 键 词：负压反馈射流喷头 附壁点 经验公式 正交试验 验证试验 

分 类 号：S277.9[农业科学—农业水土工程]