自由曲面修形技术在民机翼身组合体上的应用  

Freeform deformation and its application to the wing-body configuration design

作　　者：吕培培[1] 宋文滨[1] 张淼[2] 

机构地区：[1]上海交通大学航空航天学院,上海200240 [2]中国商用飞机有限责任公司上海飞机设计研究院,上海200232

出　　处：《飞行力学》2011年第5期22-26,共5页Flight Dynamics

基　　金：上海市"大飞机创新工程"及中国商飞相关项目(DKWX10-193)

摘　　要：翼身结合处的整流在民机气动中有很重要的作用,需要设计合适的外形以调整机翼上表面的压力分布及翼身结合处的气流,达到提高大型民用客机翼身组合体气动性能的目的。基于CATIA的自由曲面修形技术,采用自由曲线B样条的参数化方法,综合考虑工程约束(起落架布局),对民机构型翼身结合处进行了整流设计,并采用求解N-S方程的方法计算样本点,利用基于响应面的遗传算法对其进行优化。设计状态阻力减小了2.21%,达到了提高翼身组合体气动特性的目的。结果显示这种应用于复杂三维曲面的建模方法具有一定的工程应用价值。The wing-body fairing is very important in the civil aircraft configuration design.To improve the aerodynamic performances,it＇s necessary to design appropriate shape to adjust the pressure distribution on the upper surface of the wing and the turbulence flow at the wing body junction.Based on specific engineering requirements related to wing body fairing design,a free form parametric modeling method based on B-spline is proposed and implemented within CATIA;to improve the efficiency of the complete optimization process,a genetic algorithm facilitated by response surface method is applied to the problem.The drag coefficient is reduced by 2.21% for the design condition,the wing-body aerodynamic performances is improved.Results show that the method proposed can be used in an engineering environment.

关 键 词：气动优化 自由曲面修形 B样条 翼身组合体整流罩 响应面 

分 类 号：V221[航空宇航科学与技术—飞行器设计]