Flutter of Delta Wing under Aerodynamic Heating
-
摘要: 根据热气动弹性特点,探讨了气动加热温度对三角机翼模态特性和颤振特性的影响.基于热流量平衡方程,分析了气动加热下三角机翼的温度场;用有限元法求气动热效应下2个典型的超音速三角机翼模型的模态;按二阶活塞理论计算了翼面的非定常气动力,并用P-K法对颤振方程进行求解.计算结果表明,气动加热后结构的模态特性和颤振特性均发生变化;由于温度效应降低了各阶固有频率,改变了它们之间的差距,从而导致颤振速度降低.Abstract: From the characteristics of aerothermoelasticity,the effects of temperature in aerodynamic heating on the mode of a delta wing and the characteristic of its flutter were researched.The temperature distribution of the delta wing under aerodynamic heating was investigated with flux balance equation,and the influences of temperature on the natural dynamic characteristics of two typical supersonic delta wing models were analyzed with FEM(finite element method).The aerodynamic load was calculated with the second order piston theory of supersonic aerodynamics,and the flutter equations were solved with the P-K method.The research results show that aerodynamic heating will result in changes in the natural dynamic characteristics of the models,so the flutter velocity of the delta wing will decline sharply.
-
Key words:
- wing /
- flutter /
- aerothermoelasticity /
- aerodynamic heating
-
叶献辉,杨翊仁,刘菲.非对称结构参数对颤振速度的影响[J].西南交通大学学报,2005,40(6):779-782.YE Xianhui,YANG Yiren,LIU Fei.Effects of asymmetrical parameters of structure on structural flutter velocity[J].Journal of Southwest Jiaotong University,2005,40(6):779-782.[2] COLE S R,FLORANCE J R,THOMASON L B.Supersonic aeroelastic instability results for a NASP like wing model[C]//34th AIAA/ASME/ASCE/AHS/ASC Structures,Structural Dynamics and Materials Conference.La Jolla:[s.n.] ,1993:638-647.[3] HEEG J,ZEILER T,POTOTZKY A.Aerothermoelastic Analysis of a NASP Demonstrator Model[C]//34th AIAA/ASME/ASCE/AHS/ASC Structures,Structural Dynamics and Materials Conference.La Jolla:[s.n.] ,1993:617-627.[4] 张伟伟.超音速、高超音速非线性气动弹性问题研究[D].硕士学位论文.西安:西北工业大学,2004.[5] MCNAMARA J,FRIEDMANN P,POWELK,et al.Three-dimensional deroelastic and aerothermoelastic behavior in hypersonic flow[C]// 46th AIAA/ASME/ASCE/AHS/ASC Structures,Structural Dynamics and Materials Conference,Austin:[s.n.] ,2005:4655-4701.[6] 吴志刚,惠俊鹏,杨超.高超声速下翼面的热颤振工程分析[J].北京航空航天大学学报,2005,31(3):270-273.WU Zhigang,HUI Junpeng,YANG Chao.Hypersonic aerothermoelastic analysis of wings[J].Journal of Beijing University of Aeronautics and Astronautics,2005,31 (3):270-273.[7] RODDEN W P,JOHNSON E H.MSC/NASTRAN aeroelastic analysis users guide[M].Santa Ana:MSC.Software Corporation,2002:337-492.[8] 车竞,唐硕,何开锋.类乘波体飞行器气动加热的工程计算方法[J].弹道学报,2006,18(4):93-96.CHE Jing,TANG Shuo,HE Kaifeng.Engineering calculation of aerodynamic heating for quasi-waverider vehicle[J].Journal of Ballistics,2006,18(4):93-96.[9] 郑国勇,杨翊仁.结构非线性机翼的超音速和高超音速颤振[J].西南交通大学学报,2007,42(5):578-582.ZHENG Guoyong,YANG Yiren.Flutter of airfoil with structural nonlinearity in supersonic and hypersonic flow[J].Journal of Southwest Jiaotong University,2007,42(5):578-582.[10] 钱翼稷.空气动力学[M].北京:北京航空航天大学出版社,2004:94-104.
点击查看大图
计量
- 文章访问数: 1262
- HTML全文浏览量: 65
- PDF下载量: 546
- 被引次数: 0