基于CFD/CSD耦合算法的机翼颤振分析  

Wing Flutter Analysis Using CFD/CSD Algorithm

作　　者：曾宪昂[1] 徐敏[1] 安效民[1] 陈士橹[1] 

机构地区：[1]西北工业大学航天学院,陕西西安710072

出　　处：《西北工业大学学报》2008年第1期79-82,共4页Journal of Northwestern Polytechnical University

基　　金：国家自然科学基金(90405002)资助

摘　　要：用计算流体力学／计算结构力学（CFD／CSD）耦合算法对标准气动弹性模型AGARD445．6机翼作了颤振分析，主要研究机翼的跨音速颤振求解问题。采用常体积转换法（CVT）进行流体与结构之间的数据交换并运用松耦合方法对气动弹性方程进行时域推进仿真。计算机翼在Ma=0．499～1．072的颤振边界，并将计算结果同偶极子格网法（DLM）的计算结果与试验结果比较，结果显示CFD／CSD耦合计算结果较DLM计算结果更接近于试验值，尤其是在非线性强的跨音速区域。可见，CFD／CSD耦合计算比DLM具有很大的优越性。The flutter analysis of the AGARD wing 445. 6, which is a standard aeroelastic configuration, is performed using the CFD/CSD （Computational Fluid Dynamics/Computational Structural Dynamics） algorithm. The major job of this paper is the transonic flutter analysis of the wing. The constant volume transformation （CVT） method is used for fluid-structure interaction and the loose CFD/CSD algorithm is applied to time marching simulation of aeroelastic equations. The flutter boundary of the wing is calculated for roach number in the range of 0. 499 - 1. 072. The calculation results using the loose CFD/CSD algorithm and those obtained by using the doublet-lattice method （DLM） are compared with experimental results. The comparison of the results, shown in Figs. 9 and 10 in the full paper, indicates preliminarily that the calculation results using the loose CFD/CSD algorithm are closer to the experimental results than the calculation results using the DLM, especially in highly nonlinear transonic flow. Therefore the loose CFD/CSD algorithm is superior to the DLM.

关 键 词：计算流体力学/计算结构力学(CFD/CSD)耦合算法 AGARD 445.6机翼 颤振分析 常体积转换(CVT) 偶极子格网法(DLM) 

分 类 号：V211.47[航空宇航科学与技术—航空宇航推进理论与工程]