摘要
为研究冲压增程制导炮弹在不同弹道阶段的气动特性,依据其工作原理与飞行特点,设计冲压助推、爬升飞行、滑翔控制状态所对应的3种气动外形。运用拼接网格技术与雷诺转捩模型,对冲压增程制导炮弹的三维流场与气动特性进行模拟和数值计算。结果表明:3种气动外形与相同外形参数(除舵翼与头部母线外)但不采用冲压结构形式的鸭式布局制导炮弹(参考弹)相比,升阻力系数规律一致;冲压助推、滑翔控制、爬升飞行外形在相同条件下对应的阻力系数依次递减,分别较参考弹阻力系数增大约50.5%、42.9%、33%;滑翔控制外形因鸭舵展开,相同条件下升力系数较其他两种外形大,又因进气道限制了鸭舵面积,相同条件下升力系数较参考弹小(约小11.9%);弹体摆动减小了冲压发动机进气道的流量系数和总压恢复系数,对其总体性能产生了不利影响。
In order to study the aerodynamic characteristics of the solid fuel ramjet guided projectile in different ballistic stages,three aerodynamic configurations corresponding to the states of ramjet assisting,climbing flight and gliding control are designed according to the working principle and flight characteristics of projectile.The Renault transition model is used to simulate and numerically calculate the three-dimensional flow field and aerodynamic characteristics of solid fuel ramjet guided projectile.The results show that comparison of the three aerodynamic configurations with the same shape parameters(except for canard and head bus)do not adopt the ramjet of the duck-type layout guided projectile(reference projectile),the lift resistance coefficient is the same;the drag coefficients of punching boost,gliding control,and climbing flight shape under the same conditions are increased by 50.5%,42.9%and 33%,respectively,compared to the reference drag coefficient;the gliding control shape is unfolded due to the duck rudder.The lift coefficient is larger than the other two shapes under the same conditions,and the duck rudder area is limited by the air inlet.The lift coefficient is smaller than that of the reference bomb under the same conditions;and the flow path structure inside the shape has a slight influence on the lift.
作者
张宁
史金光
马晔璇
ZHANG Ning;SHI Jinguang;MA Yexuan(School of Energy and Power Engineering, Nanjing University of Science and Technology, Nanjing 210094, Jiangsu, China)
出处
《兵工学报》
EI
CAS
CSCD
北大核心
2020年第3期460-470,共11页
Acta Armamentarii
基金
国防预先研究项目(201710016004)。
关键词
制导炮弹
冲压增程
拼接网格
气动特性
guided projectile
ramjet assisting
splicing grid
aerodynamic characteristic
