固定鸭舵双旋火箭弹弹体绕流的数值研究  

Numerical Study on the Flow Around Dual-spin Rocket Projectile Body

作　　者：冯斌 于纪言[1] 王晓鸣[1] 王钰[1] FENG Bin;YU Jiyan;WANG Xiaoming;WANG Yu(ZNDY Ministerial Key Laboratory,Nanjing University of Science and Technology,Nanjing 210094,China)

机构地区：[1]南京理工大学智能弹药技术国防重点学科实验室,江苏南京210094

出　　处：《弹道学报》2021年第2期21-27,共7页Journal of Ballistics

摘　　要：为了研究加装精确制导组件的旋转稳定火箭弹弹体的绕流特性,尤其是鸭舵尾涡对弹体绕流的影响,通过计算流体力学方法,进行了网格密度研究,并对多攻角多转速工况的流场状态进行了数值仿真,利用Q准则实现对涡核心区域的辨识,并定性分析了不同工况下的流场特性,定量对比分析了弹体受力。结果表明:鸭舵涡系使弹体上出现不对称的条带状低压区域,使弹体受力呈现不对称性;受弹体滚转影响,鸭舵涡系发生扭转,其扭转方向与弹体滚转方向一致;鸭舵涡系与弹体旋转的共同作用诱导产生次级涡;存在攻角时弹体的侧向力仍然表现出明显的马格努斯效应;与传统回转体弹丸不同的是弹体转动角速度为0时侧向力系数不为0,且与攻角相关。To study the characteristics of flow around spinning stabilized rocket projectile with precision guidance kit,especially the influence of canard wake vortex on the flow around projectile,grid density was studied by computational fluid dynamics(CFD)method.The flow field under different attack-angles and different rotation-speeds was numerically calculated.The Q criterion was used to identify the vortex core region.The flow field was qualitatively analyzed;the force on the projectile was analyzed quantitatively.The results show that the canard vortex system makes the strip-shaped low-pressure region appear on the projectile body,and asymmetric vortex system makes the projectile force asymmetrical;the canard vortex system twists due to the rotation of the projectile body,and its torsion direction is the same as the rotation direction of the projectile;the canard vortex system and the projectile rotation induce the secondary vortex.The lateral force of the projectile still shows obvious change when there is an angle of attack.Different from the traditional revolving projectile,the lateral force coefficient doesn’t equal 0 when the rotating velocity equals 0,and it is related to the angle of attack.

关 键 词：双旋弹 弹道修正弹 计算流体力学 鸭舵 涡系 

分 类 号：TJ013[兵器科学与技术—兵器发射理论与技术]