横向喷流对低速大攻角细长旋成体非对称气动特性影响研究  

STUDY ON THE EFFECT OF TRANSVERSE JET ON THE ASYMMETRIC AERODYNAMIC CHARACTERISTICS OF SLENDER SPINNING BODIES WITH LOW SPEED AND LARGE ANGLE OF ATTACK

作　　者：徐一航 刘伟[1,2] Xu Yihang;Liu Wei(Jiangnan Institute of Mechanical and Electrical Design,Guiyang 550000,China;College of Aerospace Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China)

机构地区：[1]江南机电设计研究所,贵阳550000 [2]南京航空航天大学航空学院,南京210016

出　　处：《力学学报》2023年第11期2504-2517,共14页Chinese Journal of Theoretical and Applied Mechanics

摘　　要：采用风洞试验和数值模拟相结合的方法,对雷诺数Re=55000条件下细长旋成体有、无横向喷流时大攻角非对称特性进行了分析.通过风洞试验发现了旋成体在法向和侧向进行喷流时其大攻角非对称气动特性与无喷流时的区别,通过数值模拟方法对几个典型工况下旋成体有、无横向喷流时的非对称气动特性进行了分析,揭示了喷流对旋成体非对称流动分离的影响.通过风洞试验发现当细长旋成体进行法向控制时无喷流、喷流位于迎风区和喷流位于背风区的旋成体表现出了不同的非对称流动特性:首先喷流位于迎风区时攻角范围在20°~40°之间有喷流和无喷流旋成体所产生的侧向力方向相反,攻角大于40°之后侧向力系数的方向发生了改变,与无喷流时的侧向力系数方向相同,但是其绝对值要比无喷流时的侧向力系数小.其次喷流位于背风区时攻角在15°~35°之间有喷流时的侧向力系数绝对值要明显比无喷流时大,在随后的40°~70°之间旋成体侧向力系数变化规律与无喷流的趋势相似.当细长旋成体进行侧向控制时由于沿侧向的喷流所产生的直接力使得攻角范围在0°~20°之间和大于45°时有喷流的旋成体侧向力系数绝对值要比无喷流时大,但是攻角在25°~40°之间时旋成体的侧向力系数绝对值减小,甚至在35°时几乎为0.通过数值模拟发现当细长旋成体进行法向控制时,喷流位于迎风区和背风区时喷流都对有扰流片一侧的流动分离产生了影响,使得其与无喷流时的流场结构不同.无喷流时细长旋成体有扰流片的一侧首先发生流动分离,但是当喷流存在时无扰流片的一侧首先发生流动分离,从而导致了侧向力绝对值增大以及侧向力方向发生改变等现象.当细长旋成体进行侧向控制时,没有扰流片的一侧流动首先发生了分离,有扰流片的一侧后发生流动分离.旋成体有扰流片一侧由于In this paper,a combination of wind tunnel tests and numerical simulations is used to analyse the large angle of attack asymmetric characteristics of a slender spinning body with and without lateral jets at Reynolds number Re=55000.The wind tunnel tests reveal the difference between the large angle of attack asymmetric aerodynamic characteristics of the slender spiniform in the normal and lateral directions of the jet and those in the absence of the jet,and the asymmetric aerodynamic characteristics of the slender spiniform with and without the lateral jet under several typical operating conditions are analysed by means of numerical simulations.The wind tunnel tests reveal that the cyclone with no jet,jet in the windward region and jet in the leeward region exhibit different asymmetric flow characteristics when the elongated cyclone is controlled normal to the windward region.The direction of the lateral force coefficient changes after the angle of attack is greater than 40º,and is the same as the direction of the lateral force coefficient when there is no jet,but its absolute value is smaller than the lateral force coefficient when there is no jet.Secondly,when the jet is located in the leeward zone,the angle of attack between 15ºand 35ºwith the jet is significantly larger in absolute value than without the jet,and the lateral force coefficient changes between 40ºand 70ºin the subsequent cyclone in a similar pattern to that without the jet.When the slender spinning body for lateral control due to the direct force generated by the jet along the lateral direction,so that the angle of attack range between 0º~20ºand more than 45ºwith the jet of the spinning body lateral force coefficient absolute value is greater than without the jet,but the angle of attack between 25º~40ºwhen the spinning body lateral force coefficient absolute value decreases,and even at 35ºalmost zero.Numerical simulations have shown that when the long,slender spiniform is controlled normal to the windward and leeward areas of the jet,

关 键 词：细长旋成体 横向喷流 风洞试验 非对称流动 低速大攻角 

分 类 号：V211.3[航空宇航科学与技术—航空宇航推进理论与工程]