Optimal leading-edge deflection for flapping airfoil propulsion

IF 1 4区工程技术 Q3 ENGINEERING, AEROSPACE

Proceedings of the Institution of Mechanical Engineers Part G-Journal of Aerospace Engineering Pub Date : 2023-09-26 DOI:10.1177/09544100231201553

Emanuel A.R. Camacho, André R.R. Silva, Flávio D. Marques

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引用次数: 0

Abstract

The aerodynamics of oscillating airfoils are crucial to understanding subjects such as rotor dynamics and bio-inspired flows. Unsteady airfoils have been studied extensively, but there is an overall lack of knowledge regarding newer and more complex kinematics. The present paper builds upon our modified version of the NACA0012 by numerically comparing its way of flapping with the standard flapping that is common in the literature. The comparison is conducted parametrically at a Reynolds number of 10 4 for two nondimensional amplitudes. Then, using a gradient-based optimization method, we search for pitching amplitudes that maximize the propulsive power and efficiency for both flapping modes. Results indicate that the proposed flapping methodology is more promising than conventional flapping, with thrust increases up to approximately 40%. Furthermore, the proposed mechanism achieves maximum propulsive power with near-optimal efficiency, a common limitation of traditional flapping airfoils.

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扑翼型推进的最佳前缘偏转

振荡翼型的空气动力学是至关重要的理解科目，如旋翼动力学和仿生流动。非定常翼型已被广泛研究，但有关于更新和更复杂的运动学整体缺乏知识。本论文建立在我们的修改版本的NACA0012上，通过数值比较其拍动方式与文献中常见的标准拍动方式。在雷诺数为104时，对两个非维振幅进行了参数化比较。然后，采用基于梯度的优化方法，在两种扑动模式下寻找最大推进功率和效率的俯仰幅值。结果表明，所提出的扑动方法比传统的扑动方法更有前途，推力增加了约40%。此外，该机构在接近最优效率的情况下实现了最大的推进功率，这是传统扑翼型的共同局限性。

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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来源期刊

Proceedings of the Institution of Mechanical Engineers Part G-Journal of Aerospace Engineering 工程技术-工程：机械

CiteScore

2.40

自引率

18.20%

发文量

212

审稿时长

5.7 months

期刊介绍： The Journal of Aerospace Engineering is dedicated to the publication of high quality research in all branches of applied sciences and technology dealing with aircraft and spacecraft, and their support systems. "Our authorship is truly international and all efforts are made to ensure that each paper is presented in the best possible way and reaches a wide audience. "The Editorial Board is composed of recognized experts representing the technical communities of fifteen countries. The Board Members work in close cooperation with the editors, reviewers, and authors to achieve a consistent standard of well written and presented papers."Professor Rodrigo Martinez-Val, Universidad Politécnica de Madrid, Spain This journal is a member of the Committee on Publication Ethics (COPE).