UNS: Collaborative Research: Leading Edge Vortex Evolution on Compliant Biologically-Inspired Wings

UNS：合作研究：顺应性仿生机翼的前沿涡流演化

• 批准号: 1511507
• 负责人: David Willis
• 金额: $ 20.09万
• 依托单位: University of Massachusetts Lowell
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2015
• 资助国家: 美国
• 起止时间: 2015-09-01 至 2020-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1511507&HistoricalAwards=false
• 关键词: UNS; Collaborative; Research; Leading; Edge

1511507(Willis) and 1510962(Jones)This is a collaborative proposal that will utilize experiments and computations to investigate the flow field generated around a flexible wing. While a lot of research has been done to understand how lift forces are generated around solid wings, it is important to also understand why and how soft, flexible wings are used to generate lift. Fundamental knowledge generated through this work can impact both biological sciences as well as the autonomous drone industries (commercial and military).A lot of prior research work has been done on rigid wings, showing that wing kinematics can alter the strength and position of the shear layer that feeds the so-called leading edge vortices (LEVs) that are responsible for the bulk of the lift forces. The vortex dynamics have been shown to result in fluid dynamic forces. More recently, LEVs have been observed on moderate Reynolds number, and in morphing and compliant wings during low speed flight and maneuvering of insects. The proposed project will advance this area of research by investigating wing compliance effects, by examining the vortices generated at the leading edge at moderate Reynolds numbers (where the LEV is a significant but not necessarily dominant source of lift) and by quantifying importance of wing compliance and vortex dynamics to lift force production. Furthermore, educational activities are proposed via integration of research results into university courses as well as the development of several instructional materials for local K-12 schools in both Massachusetts and Maryland.

1511507（Willis）和1510962（Jones）这是一个协作提案，它将利用实验和计算来研究柔性机翼周围生成的流场。尽管已经进行了大量研究以了解如何在固体机翼周围产生升力力，但重要的是要了解为什么以及如何使用柔软，灵活的机翼来产生升力。通过这项工作产生的基本知识会影响生物学科学以及自动无人机行业（商业和军事）。在刚性机翼上进行了许多先前的研究工作，表明机翼运动学可以改变剪切层的强度和位置，从而为所谓的前缘涡流（LEVS）提供了负责效力的前缘涡流（LEVS）。涡流动力学已被证明会导致流体动力学。最近，在中等雷诺数的数字以及在低速飞行和昆虫操纵过程中的变形和兼容的翅膀上观察到了LEV。拟议的项目将通过研究机翼依从性效应，检查中等雷诺数的前沿产生的涡流（其中LEV是重要但不一定是升力的主要来源），并通过量化机翼合规性和涡流动态的重要性来提升力的重要性来推进这一研究领域。 此外，通过将研究结果整合到大学课程中以及为马萨诸塞州和马里兰州的本地K-12学校开发几种教学材料来提出教育活动。