基于品质因数的翼型绕流多孔抽吸控制  

SUCTION CONTROL OF AIRFOIL FLOW BASED ON THE FIGURE OF MERIT

作　　者：张志勇[1] 陈志华[1] 孙晓晖 张旺龙 ZHANG Zhi-yong;CHEN Zhi-hua;SUN Xiao-hui;ZHANG Wang-long(Key Laboratory of Transient Physics,Nanjing University of Science&Technology,Nanjing 210094,China;School of Mechanical Engineering,Nanjing University of Science&Technology,Nanjing 210094,China)

机构地区：[1]南京理工大学瞬态物理国家重点实验室,南京210094 [2]南京理工大学机械工程学院,南京210094

出　　处：《工程力学》2018年第4期242-248,共7页Engineering Mechanics

基　　金：中国博士后科学基金项目(2017M611819)

摘　　要：基于品质因数,对雷诺数Re=104,攻角α=6°,抽吸起始位置位于分离点的NACA0012翼型绕流分离控制进行了数值模拟,讨论了抽吸区域与抽吸系数变化对控制收益与升阻比等参数的影响。结果表明:翼型升力与升阻比系数随控制区域增加而升高,但只有一个控制区域使阻力系数最小。相同控制区域,翼型最大升阻比对应一个最佳抽吸系数。若固定抽吸控制区域,则抽吸系数应尽量小,才能获得最多控制收益。另外,存在一个最佳控制区域尺度,使控制收益最高。Based on the figure of merit,the numerical simulation for the suction control of flow past an airfoil NACA0012 is conducted at Reynolds number Re=104,angle of attackα=6°with the control beginning from the separation point.The effects of variations of the control area and suction coefficient on the control cost and lift-drag ratio are discussed.The results show that the lift and lift-drag ratio coefficients increase with the increase of the suction area.However,for the drag coefficient,there is only one control area which makes it minimum.For the same control area,there is an optimal suction coefficient which makes the lift-drag coefficient maximum.If the suction area size is constant,the suction coefficient should be as small as possible to get the utmost control gain.Furthermore,there is also an optimal control area which makes the control gain maximum.

关 键 词：多孔抽吸 大涡模拟 流体控制 抽吸位置 抽吸区域 

分 类 号：TB126[理学—工程力学]