受限空间内环形横向射流穿透特性物理数学建模与实验验证分析  

Physical-mathematical modeling and experimental verification of penetration characteristics of circular transverse jet in confined space

作　　者：李子万 袁怡祥[2] 苏世杰 谢鹏福 LI Ziwan;YUAN Yixiang;SU Shijie;XIE Pengfu(Institute for Aero Engine,Tsinghua University,Beijing 100084,China;Institute of Engineering Thermophysics,Chinese Academy of Sciences,Beijing 100190,China;School of Intelligent Manufacturing and Mechanical Engineering,Hunan Institute of Engineering,Hengyang 421000,China)

机构地区：[1]清华大学航空发动机研究院,北京100084 [2]中国科学院工程热物理研究所,北京100190 [3]湖南工学院智能制造与机械工程学院,湖南衡阳421000

出　　处：《推进技术》2025年第3期121-129,共9页Journal of Propulsion Technology

基　　金：清华大学自主科研计划(52300600222);国家自然科学基金(50876104,51676182)。

摘　　要：为了研究环形横向射流的穿透特性和射流轨迹特征,本文基于一定范围内合理假设和微分单元的受力分析,从理论上获得了高速环形横向射流在来流中射流轨迹中心线的数学物理表达模型,并通过实验测试方法对数学模型中的常数进行了确定和校验。基于该数学物理模型,厘清了影响射流穿透深度和射流轨迹的主要因素,发现射流轨迹主要与射流/主流的动量比,喷射装置的几何尺寸相关。In order to study the penetration characteristics and jet trajectory features of annular transverse jets,this paper theoretically obtains the physical and mathematical expression model of the centerline of jet tra⁃jectory of high-speed cirular transverse jets in cross flow,based on reasonable assumptions and force analysis of differential units.Then the constant term in the physical and mathematical expression model is verified by experi⁃mental results.Based on this physical and mathematical model,the main factors affecting the penetration depth and trajectory of the jet were clarified.It was found that the jet trajectory is mainly depended on the momentum ra⁃tio of the jet/mainstream and the geometric dimensions of the jet device.

关 键 词：环形横向射流 射流轨迹 穿透深度 回流区 受限空间 

分 类 号：V235.1[航空宇航科学与技术—航空宇航推进理论与工程]