摘要
为揭示不同条件下超声速圆柱绕流流动机理,该文对等直径串列双圆柱超声速绕流进行了数值研究。该文基于有限体积法和欧拉方程,结合5阶高精度加权本质无振荡格式,对不同马赫数及不同圆柱间距对流场的影响规律进行了数值研究,获得了超声速串列双圆柱绕流流场稳定后的流场特性和升力、阻力系数变化规律。结果表明,计算域内的复杂波系主要由弓形激波、反射激波以及弱激波组成;马赫数的增加会使激波结构被拉伸,改变弓形激波在壁面发生的反射类型,并造成计算域出口壅塞进而影响升力、阻力系数的稳定;圆柱间距的增加使得圆柱后方速度剪切层发生摆动,并造成不同间距条件下升力、阻力系数间的差异。
To reveal the flow mechanism around a cylinder under different supersonic flow conditions,the numerical study of the supersonic flow around double cylinders with equal diameters in series is carried out in this paper.Based on the finite volume method and the Euler equations,and combined with the 5th-order high-precision weighted essentially non-oscillatory scheme,the effects of different Mach numbers and different cylinder spacing on the flow field are numerically investigated.After the supersonic flow around tandem double cylinders being stable,the flow field structures and the change law of lift and drag coefficients are obtained.The results show that the complex wave structures in the computational domain are mainly composed of bow shock,reflected shock and weak shock.The shock structure is stretched and the reflection type of bow shock on the wall is changed when the Mach number increases,and give rise to the blockage at the outlet of the computational domain,thus affecting the stability of the lift and drag coefficients.With the increase of cylinder spacing,the velocity shear layer behind the cylinder oscillates,leading to the variation of lift and drag coefficients under different spacing conditions.
作者
赵博
李玉超
蒋鹏
郑纯
陈志华
Zhao Bo;Li Yuchao;Jiang Peng;Zheng Chun;Chen Zhihua(National Key Laboratory of Transient Physics,Nanjing University of Science and Technology,Nanjing 210094,China;Shandong Second Machinery Co.,Ltd.,Zibo 255075,China;East China Institute of Optoelectronic Integrated Devices,Suzhou 215010,China;School of Mechanical Engineering,Nanjing University of Science and Technology,Nanjing 210094,China)
出处
《南京理工大学学报》
CAS
CSCD
北大核心
2023年第4期494-502,共9页
Journal of Nanjing University of Science and Technology
关键词
超声速流动
串列双圆柱
马赫数
流场结构
升力、阻力系数
supersonic flow
tandem double cylinders
Mach number
flow field structure
lift and drag coefficients
