Fluid structure interaction design development of passive adaptive composite international moth foil
Fluid structure interaction design development of passive adaptive composite international moth foil
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发表时间：
2017-06
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通讯作者：
L. M. Giovannetti;J. Banks;M. Ledri;S. Boyd;S. Turnock
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作者：
L. M. Giovannetti;J. Banks;M. Ledri;S. Boyd;S. Turnock
国际飞蛾是一艘单手超轻翼发展级船，它遵循公开级规则。因此，设计师和建造者有充分的自由来开发和生产最快的船b[1]。有可能调整固定箔的内部结构，以实现给定负载的定制扭转角度。探索在飞蛾水翼上使用被动自适应复合材料（PAC）来控制其俯仰角的可能性，使船能够在广泛的天气条件下实现稳定飞行，同时减少诱导阻力，被动地降低攻角，增加船速。在多单元翼片中使用PAC，例如国际飞蛾翼，将允许结构在速度高于设计起飞速度的情况下获得恒定的升力，而不需要不断修改后翼部分。针对PAC飞蛾固定翼型的发展，给出并讨论了单单元翼型升力系数随风速增加而线性减小的实验和数值结果。结果显示了箔片的气弹性响应，解释了流固耦合问题的复杂性。
The International Moth is a single-handed ultra-lightweight foiling development class boat, and it follows open class rules. Therefore, the designer and builder have full liberty to develop and produce the fastest boat [1]. It is possible to adapt the internal structure of the fixed foil to achieve a tailored twist angle for a given load. Exploring the possibility of using Passive Adaptive Composite (PAC) on the moth hydrofoil to control its pitch angle enables the boat to achieve a stable flight in a wide range of weather conditions whilst reducing the induced drag, passively decreasing the angle of attack in increased boat speed. Using PAC in a multi-element foil, such as the International Moth one, will allow the structure to achieve a constant lift force with speeds higher than the design take-off speed with less need to constantly modifying the rear foil section. Toward the development of a PAC moth fixed foil, experimental and numerical results for a single element aerofoil, able to achieve a linear decrease in lift coefficient with increase in wind speed, are presented and discussed. The results present the aero-elastic response of the foil explaining the complexity involved in fluid-structure interaction problems.