空气动力学学报2018，Vol.36Issue(3)：529-534,6.DOI:10.7638/kqdlxxb-2017.0090
悬停状态下倾转旋翼机向下载荷被动减缓措施研究
Strategies for tiltrotor aircraft download reduction in hover using passive flow control
摘要
Abstract
A numerical study solving the Navier-Stokes equations for the unsteady massively separated flows around an airfoil section at -90° angle of attack is performed based on the SA-DES approach.Four passive flow control strategies,namely trailing edge flap,Kruger flap, droop-nose and spoiler are used to research the download (vertical drag)reduction for tiltrotor aircraft in hover.The effects of different factors are also discussed.The results indicate that when the trailing edge flap deflection angle is 60°,the airfoil has the minimum download;the minimum downloads of configurations with the Kruger flap,the droop-nose and the spoiler are generated at a Kruger flap angle of 85°,a droop-nose deflection angle of 45°,and a height-to-chord ratio of h/c=0.05,respectively.The results show that the drag of the optimal assembly configuration, with a trailing edge flap deflection angle of 60° and a Kruger flap angle of 85°,is reduced by 55.4％ compared with the basic airfoil.关键词
倾转旋翼机/向下载荷/被动控制技术/分离涡模拟Key words
tiltrotor aircraft/download/passive flow control/DES分类
航空航天引用本文复制引用
陈皓,陆志良,郭同庆..悬停状态下倾转旋翼机向下载荷被动减缓措施研究[J].空气动力学学报,2018,36(3):529-534,6.基金项目
江苏高校优势学科建设工程资助项目 （）
