The Effect of Winglets for the Blended Wing Body Civil Aircraft
The effect of the shape parameters of winglets on aerodynamic performance for the Blended Wing Body (BWB) civil aircraft is studied by computational fluid dynamics (CFD) method. The three main shape parameters are the angle of inclination, sweep angle and the height of winglets. It is shown that the winglets can change the load distribution, while weakening the lateral shock wave of external wings, leading to the wave drag smaller. Meanwhile the winglets can increase the effective aspect ratio and the wings lift in cruising. As a result, the height of winglets is 0. 24c, the angle of inclination is 15° and the sweep angle is 45°, Kmax of the aircraft is increased by 15％ compared with that without winglets. In addition, the winglets can play a role as an end-plate to prevent the wingtip vortex shedding and add to the effective aspect ratio to increase the lift of wings in take-off. As a result, CLmax can increase about 6~8％ and the stall angle of attack can delay about 2°~3° for the BWB civil aircraft with winglets compared with that without winglets.
blended wing body winglet computational fluid dynamics aerodynamic performance
Xiang Yang Liu Xiaojing Wu Jianghao
School of Transportation Science and Engineering, Beihang University, Beijing 100191,China School of Transportation Science and Engineering, Beihang University,Beijing 100191, China School of Transportation Science and Engineering,Beihang University, Beijing 100191, China Airworthi
国际会议
2010 Asia-Pacific International Symposium on Aerospace Technology(2010 亚太航空航天技术研讨会 APISAT 2010)
西安
英文
104-107
2010-09-01（万方平台首次上网日期，不代表论文的发表时间）