翼型后缘变弯对炮射滑翔增程弹气动特性的影响  

Influence of Variable Camber Trailing-Edge on Aerodynamic Characteristics of Gun-Launched Gliding Extended Range Projectile

作　　者：李钊 张龙[1] 杨广珺[2] 王雨 LI Zhao;ZHANG Long;YANG Guangjun;WANG Yu(Northwest Institute of Mechanical&Electrical Engineering,Xianyang 712009,Shaanxi,China;National Key Laboratory of Science and Technology on UAV,Northwestern Polytechnical University,Xi′an,710072,China)

机构地区：[1]西北机电工程研究所,陕西咸阳712099 [2]西北工业大学无人机特种技术国防科技重点实验室,陕西西安710068

出　　处：《火炮发射与控制学报》2025年第1期30-36,共7页Journal of Gun Launch & Control

基　　金：国家自然科学基金(U2341237)。

摘　　要：增加炮射滑翔增程弹性能的核心是提高弹丸气动性能,在已有变后掠角结构的增程基础上,通过引入后缘无缝连续变弯技术,可减轻翼面气流分离,在不引起整体尺寸额外增加的前提下提高滑翔阶段的弹体升阻比,改善气动性能,增加滑翔航程。研究弹翼后缘弯度变化对弹药气动特性的影响规律,以后缘连续变形弹翼为对象,引入一方程S-A湍流模型封闭N-S方程并求解,分别完成具有±5°后缘偏角翼型的气动性能计算,对其在不同雷诺数下的升阻力系数、力矩系数等气动性能进行分析。数值计算表明:滑翔增程弹的弹翼从80%弦长处位置产生5°正偏转时,翼型升力系数提高可达16%以上,俯仰力矩有利于弹体稳定性能提高;后缘正偏转弹翼在流场动态发展过程中均可产生稳定升力,平均升阻比相比原始弹翼提高80%以上,滑翔距离增加78%以上。The essence of a gun-launched gliding extended-range projectile is to enhance aerodynamic performance.Building upon the existing variable sweep angle extended-range structure,the continuous trailing-edge variable camber reduces airflow separation,increases the lift-drag ratio,improves aerodynamic characteristics,and extends the gliding range without causing an additional increase in overall size.To study the impact of deflection in the trailing edge of the projectile on aerodynamic characteristics,a continuous trailing-edge variable camber airfoil is selected as the research subject.The S-A turbulent model is applied to close the NS equations and calculate the aerodynamic characteristics of the airfoil with±5°deflection separately.Analysis is conducted on lift,drag,moment coefficient,and other parameters.Numerical results indicate that a 5°deflection from the 80%chord length position of the airfoil significantly enhances the aerodynamic characteristics of the gliding projectile:the lift coefficient can be increased by more than 16%,while the average lift-to-drag ratio is more than 80%higher than that of the original airfoil.Additionally,the continuous trailing-edge variable camber projectile exhibits improved pitching moment,contributing to stability.The average lift-to-drag ratio of the trailing edge positive deflection airfoil is increased by more than 80%compared to the original airfoil,resulting in a gliding distance increase of over 78%.

关 键 词：炮射滑翔弹 翼型后缘变弯 气动特性 滑翔性能 

分 类 号：TJ320[兵器科学与技术—火炮、自动武器与弹药工程]