The changes in structural and flight safety due to flap design of Blended-Wing-Body civil aircraft
Based on the 250-passenger BWB configuration, the effect of the configuration of flap on BWB civil aircraft flight loading during takeoff and landing is studied by computational fluid dynamics.Flight loading varied with the flap deflection, area and the layout is discussed.It is shown the existence of flap makes the angle of attack smaller in takeoff and landing and aerodynamic forces and moment larger.In addition, it can change the loading distribution along span wise of the wing and affect the structural safety.Especially, increased pitch moment can make flight safety worse in takeoff and landing.In some cases, it is important that the function of flap is to improve the drag significantly and reduce the distance of taxiing to benefit to safety in landing.The airworthiness will have to be reevaluated before the flaps are used in BWB on basis of the structural and flight safety considerations according to CCAR25.
Blended wing body (BWB) tailing-flap numerical simulation flight loading airworthiness
WU Jianghao CAI Chenfang ZHANG Yanlai
School of Transportation Science and Engineering,,BeiHang university Beijing 100191,China
国际会议
北京
英文
320-327
2011-10-01（万方平台首次上网日期，不代表论文的发表时间）