低雷诺数多段翼型地面效应数值仿真  

Numerical Simulation of Ground Effect of Multi-element Airfoil with Low Reynolds Number

作　　者：陈建炜 姜敏 陈道锦 卢鸣声 贺伟炜 CHEN Jianwei;JIANG Min;CHEN Daojin;LU Mingsheng;HE Weiwei(Shanghai Radio Equipment Research Institute,Shanghai 201109,China;Shanghai Engineering Research Center of Target Identification and Environment Perception,Shanghai 201109,China;Traffic Perception Radar Technology Research&Development Center of CASC,Shanghai 201109,China)

机构地区：[1]上海无线电设备研究所,上海201109 [2]上海目标识别与环境感知工程技术研究中心,上海201109 [3]中国航天科技集团有限公司交通感知雷达技术研发中心,上海201109

出　　处：《制导与引信》2022年第2期7-12,31,共7页Guidance & Fuze

摘　　要：基于雷诺平均纳维-斯托克斯(Reynolds-averaged Navier-Stokes,RANS)方程结合Realizablek-ε湍流模型,采用流体动力学方法对30P30N多段翼型的低雷诺数地面效应进行数值研究,仿真验证30P30N多段翼型在不同高度、不同迎角状态下的气动特性。计算结果表明:低雷诺数条件下,迎角为0时,30P30N多段翼型的最大升力由尾部襟翼提供;受地面效应影响,总体上,翼型离地高度越低,升力系数及升阻比越大,失速迎角越大;小迎角状态时,30P30N多段翼型的中部主翼下翼面发生气流分离,产生层流分离泡,且随着离地高度的增加而出现非典型“哑铃”形分离泡结构;增大迎角后,下翼面气流分离现象消失而上翼面开始出现气流分离。Combining the Reynolds-averaged Navier-Stokes(RANS)equation with the Realizable k-εturbulence model,the computational fluid dynamics(CFD)method is used to study the ground effect of 30 P30 N multi-element airfoil with low Reynolds number.The aerodynamic characteristics of 30 P30 N multi-element airfoil at different altitudes and angles of attack are calculated.The calculation results show that the lift of the 30 P30 N multi-element airfoil is mainly provided by the tail flap at low Reynolds number when the angle of attack is zero.Affected by the ground effect,generally,the lower the ground clearance of the airfoil,the greater the lift coefficient and the lift-to-drag ratio,and the greater the stalling angle of attack.The airflow separation occurs on the lower wing surface of the central main wing of the 30 P30 N multi-element airfoil at low angle of attack,resulting in laminar separation bubble,and an atypical“dumbbell”-shaped separation bubble structure occurs when the ground clearance is increased.When the angle of attack increases,the airflow separation disappears on the lower wing surface and begins to appear on the upper wing surface.

关 键 词：雷诺平均纳维-斯托克斯方程 Realizablek-ε湍流模型 多段翼型 低雷诺数 地面效应 

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]