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首页> 外文会议>Congress of the International Council of the Aeronautical Sciences; 20060903-08; Hamburg(DE) >AEROELASTIC ANALYSIS OF TYPICAL SECTIONS WITH STRUCTURAL AND AERODYNAMIC NONLINEARITIES
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AEROELASTIC ANALYSIS OF TYPICAL SECTIONS WITH STRUCTURAL AND AERODYNAMIC NONLINEARITIES

机译：具有结构和气动非线性的典型截面的气动弹性分析

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摘要

The application of time domain analyses for aeroelastic problem in a transonic flow is considered. The methodology here proposed is to present an investigation on the effects of non-linearities on aeroelastic behavior for an airfoil moving in pitch and plunge. Here structural dynamics is considered in terms of concentrated nonlinearities. The CFD tool employed in the present work is based on the Euler formulation. The governing equations are integrated by cell-centered, finite-volume, centered space discretization and five-stage, hybrid, explicit, Runge-Kutta time marching scheme. This CFD tool solves flows around two-dimensional lifting surfaces moving in pitch and plunge. The computational domain is discretized using unstructured grids and the movement is modeled with dynamic mesh algorithm. To solve the aeroelastic problem the Runge-Kutta method is applied combined with the CFD code. The time domain aeroelastic responses concerned particularly the NACA0012 airfoil are analysed by investigating typical LCO nonlinear effects from phase plane.
机译：考虑了时域分析在跨音速流中气动弹性问题中的应用。此处提出的方法是对螺距和俯冲运动的机翼的非线性对气动弹性行为的影响进行研究。在这里，结构动力学是根据集中的非线性考虑的。本工作中使用的CFD工具基于Euler公式。控制方程由以单元为中心的有限体积，以中心空间离散化和五阶段，混合，显式，Runge-Kutta时间行进方案集成。该CFD工具解决了围绕俯仰和俯冲运动的二维提升面的流动。使用非结构化网格离散计算域，并使用动态网格算法对运动进行建模。为了解决气动弹性问题，将Runge-Kutta方法与CFD代码结合使用。通过研究相平面中典型的LCO非线性效应来分析时域气动弹性响应，尤其是NACA0012机翼。

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