维普中文期刊产品整合服务

Oscillation quenching and physical explanation on freeplay-based aeroelastic airfoil in transonic viscous flow

查看全文 作　　者：Yayun [1]SHI;Shun [2]HE;Gaowei [3]CUI;Gang [1]CHEN;Yan [4]LIU 高影响力作者 机构地区：[1]State Key Laboratory for Strength and Vibration of Mechanical Structures,School of Aerospace Engineering,Xi’an Jiaotong University,Xi’an 710049,China;[2]School of Aeronautics,Northwestern Polytechnical University,Xi’an 710072,China;[3]Beijing Institute of Structure and Environment Engineering,Beijing 100076,China;[4]Shenyang Aircraft Design Institute,Shenyang 110036,China高影响力机构 出　　处：《Chinese Journal of Aeronautics》索引2023年第36卷第10期,共13页高影响力期刊 基　　金：the financial support by the National Natural Science Foundation of China(No.12102317). 摘　　要：Limit Cycle Oscillation(LCO)quenching of a supercritical airfoil(NLR 7301)considering freeplay is investigated in transonic viscous flow.Computational Fluid Dynamics(CFD)based on Navier-Stokes equations is implemented to calculate transonic aerodynamic forces.A loosely coupled scheme with steady CFD and an efficient graphic method are developed to obtain the aerodynamic preload.LCO quenching phenomenon is observed from the nonlinear dynamic aeroelastic response obtained by using time marching approach.As the airspeed increases,LCO appears then quenches,forming the first LCO branch.Following the quenching region,LCO occurs again and sustains until the divergence of the response,forming the second LCO branch.The quenching of LCOs was addressed physically based on the aerodynamic preload and the linear flutter characteristic.An“island”of stable region is observed in the flutter boundary,i.e.the flutter speed versus the mean Angle of Attack(AoA).The LCO quenches when the aerodynamic preload crosses this stable region with the increasing of airspeed.The LCO quenching of this model in transonic flow is essentially induced by destabilizing effect from aerodynamic preload,since the flutter speed is sensitive to AoA due to aerodynamic nonlinearity. 关 键 词：Freeplay Nonlinear aeroelasticity Supercritical airfoil Transonic flutter Unsteady flow
相关文献

参考文献(38)

引证文献(2)

网站首页 | 关于我们 | 联系我们 | 产品服务 | 客服中心 | 广告服务 | 版权声明 | 网站联盟 | 友情链接 | 售卡网点

版权所有© 渝B2-20050021-1　渝公网安备 50019002500403号　违法和不良信息举报中心

互联网出版许可证 新出网证(渝)字10号 全国400电话 - 免长途话费