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首页> 外文会议>AHS(American Helicopter Society International) Specialists Conference on Aerodynamics; 20080123-25; San Francisco,CA(US) >Coupling of a Geometrically Exact Rotor Blade Analysis with Unsteady Aerodynamics and Dynamic Inflow
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Coupling of a Geometrically Exact Rotor Blade Analysis with Unsteady Aerodynamics and Dynamic Inflow

机译：具有非定常空气动力学和动态流入的几何精确转子叶片分析的耦合

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摘要

This paper presents a coupling of a geometrically exact rotor blade analysis with unsteady aerodynamics and dynamic inflow. Helicopter rotor exhibits an environment different from that in a fixed-wing aircraft due to its complex aerodynamic condition as well as different structural behavior. To understand its unique characteristics and alleviate the problems caused by them, it is required to develop an accurate aeroelastic analysis. To describe the structural behavior of helicopter rotor precisely, geometrical exactness should be considered. In order to capture physical reality in unsteady aerodynamics and to carry out the system stability analysis, a generalized dynamic wake formulation is used. With these, development of a practical analytical framework is conducted for fluid-structure interaction in helicopter rotor. The present framework is established for a pre-twisted, off-hinged and pre-coned rotor blade by combining appropriate structural and aerodynamic model. The transient solutions regarding the airloads and structural deflections are obtained and compared with the other available results.
机译：本文提出了几何精确的转子叶片分析与不稳定的空气动力学和动态流入的耦合。直升机旋翼由于其复杂的空气动力学条件以及不同的结构性能而呈现出与固定翼飞机不同的环境。为了理解其独特的特性并减轻由它们引起的问题，需要进行精确的气动弹性分析。为了精确描述直升机旋翼的结构行为，应考虑几何精度。为了捕获不稳定空气动力学中的物理现实并进行系统稳定性分析，使用了广义的动态尾流公式。利用这些，为直升机旋翼中的流体-结构相互作用进行了实用的分析框架的开发。通过结合适当的结构模型和空气动力学模型，为预扭转，脱垂和预锥形转子叶片建立了本框架。获得了关于空气载荷和结构变形的瞬态解，并将其与其他可用结果进行了比较。

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