Application of wavy leading edge to enhance winglet aerodynamic performance

J. A. Flores-Mezarina, P. D. Bravo-Mosquera, D. Garcia-Ribeiro, H. Cerón-Muñoz
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引用次数: 2

Abstract

The wavy leading edge (WLE, also known as leading edge protuberances) is a passive flow control device inspired by the humpback whale pectoral flippers. It reduces the flow of three-dimensional effects on wings and increases their aerodynamic performance at high angles of attack. Despite the numerous studies on its aerodynamic benefits, research on its possible applications is still incipient. Therefore, this article addresses an evaluation of the WLE effects on the aerodynamic performance of a winglet. A rectangular wing, a base smooth leading edge winglet, and a winglet with WLE were designed and manufactured for CFD simulations and wind tunnel measurements. The winglet with WLE increased the maximum aerodynamic efficiency, i.e. this configuration reduced the induced drag by increasing wingtip vortex dissipation at a given angle-of-attack. Such results were used in re-evaluations of the aerodynamic performance of an original agricultural aircraft initially configured with a multi-winglet device. The winglet with WLE showed to be effective at increasing the aircraft operational time and range under a simulated actual condition.
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波浪前缘在小翼气动性能提升中的应用
波浪前缘(WLE,也称为前缘突起)是一种被动的流量控制装置,灵感来自座头鲸的胸鳍。它减少了气流对机翼的三维影响,提高了机翼在大迎角时的气动性能。尽管对其气动效益进行了大量的研究,但对其可能应用的研究仍处于起步阶段。因此,本文讨论了小翼翼隙对其气动性能的影响。设计并制造了矩形翼、基底光滑前缘小翼和带WLE的小翼,并进行了CFD模拟和风洞测量。带WLE的小翼增加了最大气动效率,即在给定迎角下,这种配置通过增加翼尖涡耗散来减少诱导阻力。这些结果被用于重新评估最初配置了多小翼装置的原始农用飞机的空气动力学性能。仿真结果表明,带WLE的小翼能够有效地增加飞机的作战时间和航程。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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