Aerothermal-aeroelastic two-way coupling method for hypersonic curved panel flutter  

作　　者：YANG Chao LI GuoShu WAN ZhiQiang 

机构地区：[1]School of Aeronautics Science and Engineering,Beijing University of Aeronautics and Astronautics,Beijing 100191,China

出　　处：《Science China(Technological Sciences)》2012年第3期831-840,共10页中国科学（技术科学英文版）

摘　　要：A method to compute aerothermal-aeroelastic two-way coupling for hypersonic curved panel flutter is proposed. The aero-therrno-elastic governing equations of a simply-supported two dimensional curved panel are developed based on the von K＇arrn＇an geometrically non-linear theory. The Galerkin approach is used to simplify the equations into discrete forms, which are solved by the fourth-order Ronger-Kutta method. The third-order piston theory is applied to the aerodynamics. The Eck- ert＇s reference temperature method and the panel heat flux formula are used to compute the aerodynamic heat flux. Several important effects are included, namely 1） two-way coupling considering the effect of elastic deformation on aerodynamic heating and aerodynamic heating on stiffness of structure, 2） accumulation of the aerodynamic heating in real cruise, 3） arbitrary, non-uniform, in-plane and through-thickness temperature distributions, and 4） the effect of initial deformation of curved panel on the flight time to the onset of flutter. Compared with the results of aerothermal-aeroelastic one-way coupling, it is revealed that the two-way coupling which induces decrease of the flight time to the onset of flutter is more dangerous. In addition, importance should be attached to this method in actual analysis.

关 键 词：panel flutter aerothermoelasticity third-order piston theory two-way coupling hypersonic flow 

分 类 号：V215.3[航空宇航科学与技术—航空宇航推进理论与工程] V211