Aerodynamics loads variations of wings with novel heating of top surface: Bioinspiration and experimental study
Aerodynamics loads variations of wings with novel heating of top surface: Bioinspiration and experimental study
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DOI：
10.1016/j.expthermflusci.2019.109884
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发表时间：
2019-12-01
影响因子：
3.2
通讯作者：
Sadeghi, S.
中科院分区：
文献类型：
--
作者：
Hassanalian, M.;Pellerito, V;Sadeghi, S.
通过提高系统效率，无人驾驶飞行器的应用变得越来越容易实现。在自然界中，信天翁等鸟类利用翅膀颜色产生的温度效应来提高飞行效率。本文研究了鸟的黑/白色翅膀、彩色平板和带有加热膜的翼型表面温度差异的影响。这种影响适用于固定翼无人机的效率。在实验中，观察到在太阳辐射下，黑鸟翅膀的表面温度比白色翅膀高50%以上。在五种翼型上应用新型加热顶面，与未加热顶面相比，某些翼型在特定攻角下的阻力系数可降低60%，升力系数可提高70%。这种利用热效应的方法可以被认为是提高固定翼无人机飞行效率的一种新的实用途径。
Applications of unmanned aerial vehicles are becoming more attainable through the increase in system efficiency. As seen in nature, birds like the albatross utilize the temperature effects resulting from their wings' color to increase their flight efficiency. In this paper, the effects that differences in surface temperatures of birds' black/white wings, colored flat plates, and airfoils with heating films is investigated. Such effects are applicable to the efficiency of fixed-wing drones. Experimentally, it is observed that the surface temperature of black birds' wings is over 50% higher than white wings under solar radiation. The application of a novel heated top surface on five airfoils results in the drag coefficient decreasing up to 60% and the lift coefficient increasing up to 70% for some airfoils in specified angles of attack compared to a non-heated top surface. This method of utilizing thermal effects can be considered as a new applicable way to increase the flight efficiency in fixed-wing unmanned aerial vehicles.