Prediction of Transonic Limit-Cycle Oscillations Using an Aeroelastic Harmonic Balance Method
Prediction of Transonic Limit-Cycle Oscillations Using an Aeroelastic Harmonic Balance Method
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DOI：
10.2514/1.j053565
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发表时间：
2015-04
期刊：
影响因子：
2.5
通讯作者：
W. Yao;S. Marques
中科院分区：
文献类型：
--
作者：
W. Yao;S. Marques
本文提出了一种用高保真度分析计算跨音速极限环振荡的新方法。基于计算流体动力学的谐波平衡方法已被证明是预测周期现象的有效工具。本文的贡献是提出了一种新的方法来确定未知频率的振荡，使谐波平衡法，以准确地捕捉极限环振荡，这是通过定义一个频率更新程序的基础上耦合计算流体动力学/计算结构动力学谐波平衡制定找到极限环振荡条件。俯仰/切入翼型和三角翼气动和相应的线性结构模型用于验证新方法对传统的时域模拟。结果表明，所提出的方法和时间推进方法的极限环振荡幅度和频率之间的一致性，同时产生至少一个数量级的减少…
This work proposes a novel approach to compute transonic limit-cycle oscillations using high-fidelity analysis. Computational-Fluid-Dynamics based harmonic balance methods have proven to be efficient tools to predict periodic phenomena. This paper’s contribution is to present a new methodology to determine the unknown frequency of oscillations, enabling harmonic balance methods to accurately capture limit-cycle oscillations; this is achieved by defining a frequency-updating procedure based on a coupled computational-fluid-dynamics/computational-structural-dynamics harmonic balance formulation to find the limit-cycle oscillation condition. A pitch/plunge airfoil and delta wing aerodynamic and respective linear structural models are used to validate the new method against conventional time-domain simulations. Results show consistent agreement between the proposed and time-marching methods for both limit-cycle oscillation amplitude and frequency while producing at least a one-order-of-magnitude reduction in ...