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On the fluid dynamics of adaptive airfoils

机译:关于自适应翼型的流体动力学

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摘要

This paper discusses issues and practical requirements for an adaptive wing in relation to currently available technology. Adaptive wings offer many benefits, but a viable wing will require research into several areas, including selection ofinitial and perturbed airfoil shapes, steady and unsteady aerodynamic analysis of adaptive airfoils, and methods for real-time shape control of an adaptive wing system. An overview of adaptive wing history is briefly covered, including some recentdevelopments. Development considerations for an adaptive wing system are then discussed. Aerodynamic performance and stability should be considered in the context of the wing's structural integrity and aeroelasticity. Particular attention should be paidto the unsteady nature of the flow, as standard quasi-steady flow analysis techniques should be abandoned due to the rapid changes in wing shape and motion. Due to the large number of variable and measured parameters, an advanced control system isrequired to relate the flight conditions with changes in geometry. Issues related to adapting wings to various aircraft scales will be discussed, specifically micro aerial vehicles (μAVs), unmanned aerial vehicles (UAVs or RPVs), full-scale aircraft, and ornithopters.
机译:本文讨论了与当前可用技术相关的自适应机翼的问题和实际要求。自适应翅膀提供了许多好处,但是可行的翼将需要研究几个区域,包括选择性和扰动翼型的形状,适应性翼型的稳定和不稳定的空气动力学分析,以及自适应机翼系统的实时形状控制方法。简要介绍了自适应翼历史的概述,包括一些最新的开发。然后讨论了自适应机翼系统的开发考虑因素。在机翼的结构完整性和空气弹性的背景下应考虑空气动力学性能和稳定性。应特别注意流量的不稳定性,因为由于机翼形状和运动的快速变化,应抛弃标准的准稳态流量分析技术。由于变量和测量参数大量,先进的控制系统isRequired以在几何图形的变化中涉及飞行条件。将讨论与调整翅膀对各种飞机秤的问题,特别是微空中车辆(μave),无人驾驶飞行器(无人机或RPV),全尺寸飞机和鸟类术。

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