垂直/短矩起降飞机机翼内埋式风扇布局气动特性分析

王红波; 祝小平; 周洲; 甘文彪; 张乐

doi:10.13224/j.cnki.jasp.2016.01.021

垂直/短矩起降飞机机翼内埋式风扇布局气动特性分析

doi: 10.13224/j.cnki.jasp.2016.01.021

王红波^1,2,
祝小平²,
周洲^1,2,
甘文彪^1,2,
张乐^1,2

1. 西北工业大学航空学院, 西安 710072;
2. 西北工业大学无人机特种技术重点实验室, 西安 710065

详细信息

作者简介:
王红波(1986-),男,陕西安康人,博士生,主要从事垂直起降无人机总体气动设计.

中图分类号: V211
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- 被引次数: 0
出版历程
- 收稿日期: 2014-05-12
- 刊出日期: 2016-01-28

Analysis on aerodynamic characteristics of fan-in-wing configuration of V/STOL aircrafts

1. School of Aeronautics, Northwestern Polytechnical University, Xi'an 710072, China;
2. Science and Technology of Unmanned Aerial Vehicle Laboratory, Northwestern Polytechnical University, Xi'an 710065, China

摘要

摘要: 以垂直/短距起降飞机过渡飞行状态为背景,针对机翼内埋式风扇布局的自由来流/风扇喷流混合型流动,基于结构/非结构混合网格使用CFD方法进行了非定常数值模拟和分析.首先使用滑移网格技术对NASA涵道螺旋桨进行算例验证,其时均计算结果与实验值的误差为5.3%,证明了计算方法的可靠性和准确性,然后数值模拟了机翼内埋式风扇布局在不同迎角下的气动性能.结果表明:风扇喷流在机翼上产生了特有的“抽吸”和“堵塞”效应,引起了机翼总升阻力的显著增加,升力最大增量达到干净机翼升力的2.6倍,阻力最大增量为干净机翼阻力的3.2倍,混合流场在机翼后缘引起了升力损失并卷起对涡.
- 垂直/短距起降 /
- 机翼内埋式风扇布局 /
- CFD方法 /
- 滑移网格 /
- 升力损失 /
- 对涡
Abstract: The complex flow caused by the interaction of the fan jets with the freestream was numerically simulated and compared using computational fluid dynamics(CFD) method based on structured/unstructured mixed grids in order to investigate aerodynamic characteristic of a fan-in-wing configuration about vertical/short takeoff and landing(V/STOL) under transition. The ducted propeller of NASA was simulated firstly using sliding mesh technique. Time-averaged results showed a good agreement with experiments and the relative error was 5.3%, proving the CFD methods using above was reliable and accurate. And then, the aerodynamics of fan-in-wing configuration with different attack angles was calculated. Results indicate that the special effects of suckdown and blocking caused by the fan jets lead to notable lift and drag increments, the max lift increment is 2.6 times the closed-wing's lift and the max drag increment is 3.2 times the closed-wing's drag. The mixed flow field located at the rear of the wing results in a little of lift loss and rolls up in a pair of vortices.
- vertical/short takeoff and landing /
- fan-in-wing configuration /
- computational fluid dynamics (CFD) method /
- sliding mesh /
- lift loss /
- a pair of vortices

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