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arXiv 2003.02402physics.flu-dyn
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翼型对阵风的气动弹性响应:根据计算能量图的预测和控制策略

Aeroelastic response of an airfoil to gusts: Prediction and control strategies from computed energy maps

Karthik Menon, Rajat Mittal

摘要:

本文提出了一种计算翼型在阵风作用下气动弹性俯仰响应的方法。该预测是基于能量地图所产生的高保真度流体动力学模拟的翼型与规定的俯仰振荡。能量图量化了俯仰翼型与流动之间的能量交换,并作为流形,气动弹性翼型系统的动力学状态在该流形上增长、衰减并达到稳态。这种方法使我们能够研究系统对大阵风的完全非线性响应,并预测气动弹性俯仰不稳定性的增长和饱和。我们还表明,在这些地图中的流形拓扑结构可以用来作出明智的修改系统参数,以控制响应阵风。

英文摘要:

A method to predict the aeroelastic pitch response of an airfoil to gusts is presented. The prediction is based on energy maps generated by high-fidelity fluid dynamic simulations of the airfoil with prescribed pitch oscillations. The energy maps quantify the exchange of energy between the pitching airfoil and the flow, and serve as manifolds over which the dynamical states of aeroelastic airfoil system grow, decay and attain stationary states. This method allows us to study the full nonlinear response of the system to large gusts, and predict the growth and saturation of aeroelastic pitch instabilities. We also show that the manifold topology in these maps can be used to make informed modifications to the system parameters in order to control the response to gusts.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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