机载布撒子弹药气动特性仿真分析  

Simulation analysis of the aerodynamic characteristics of airborne submunitions

作　　者：李阳 杨洲[1] 杨鹏飞 肖波 林彬 LI Yang;YANG Zhou;YANG Pengfei;XIAO Bo;LIN Bin(Center for Strategy Assessment and Consulting,PLA Academy of Military Science,Beijing 100091,China)

机构地区：[1]军事科学院战略评估咨询中心,北京100091

出　　处：《兵器装备工程学报》2024年第11期96-101,共6页Journal of Ordnance Equipment Engineering

摘　　要：为优化机载布撒的子弹药的气动外形,结合子弹药的特点,设计了3种不同头部形状(平头、凹头、凸头)的结构外形,基于计算流体力学方法(computational fluid dynamics,CFD)分别建立了3种子弹的数值模型并进行了仿真计算,并通过风洞试验验证了数值模型的有效性,对比分析了不同头部形状下子弹药的周围流场特性和气动特性。结果表明:3种模型的弹体侧面和弹底附近均出现了低压区,且平头模型的低压区的范围和强度最大;弹体头部形状仅对阻力系数影响比较大,平头弹模型的阻力系数最大且阻力散布较小,压心位于模型的重心之后,弹体均是静稳定的;考虑到弹体在布撒器内的装配以及加工工艺,平头的气动外形更加有利于降低开伞时弹体的速度。In order to optimize the shape of the airborne submunition,three different head shapes(flat head,concave head,convex head)were designed based on the characteristics of the submunition.Three numerical models of the submunition were established based on computational fluid dynamics(CFD)and simulation calculations were performed.The validity of the numerical model is verified by wind tunnel test.The surrounding flow field and aerodynamic characteristics of the submunition with different head shapes were compared and analyzed.The results show that low-pressure areas appear on the sides and bottom of the submunition in all three models,and the flat head model has the largest range and intensity of low-pressure areas;The shape of the submunition head has a significant impact only on the drag coefficient.The drag coefficient of the flat headed model is the highest and the drag dispersion is small.The pressure center is located behind the center of gravity,and the submunition is statically stable;Considering the assembly and processing technology of the submunition inside the dispenser,the flat headed model is more conducive to reducing the velocity of the projectile when the parachute opens.

关 键 词：机载布撒子弹药 计算流体力学 数值仿真 气动特性 

分 类 号：TJ413.3[兵器科学与技术—火炮、自动武器与弹药工程]