一种提高载重量的新型气动布局设计研究

Design of a new aerodynamic configuration for increasing aircraft loads

为了兼顾大载重飞机的气动性能和结构特性,针对刚度特性较好的厚翼型提出和发展了一种新型气动布局形式,在有限的翼展限制下,通过多排翼的设计思路,提高主机翼的升力性能。数值模拟结果表明,采用新的气动布局后,与传统较薄机翼的单翼布局比较,升力特性可普遍提高50%左右。通过加装偏转角、缩小后翼弦长等进一步优化,升阻比性能也优于传统薄翼,从而表明所提出的设计方案对大载重飞机的设计和发展具有重要的参考价值。

Heavy aircraft are in favor with some special engineering. However, problems of stiffness and strength such as great deformation or even rupture emerges with the great aerodynamic loads during the design and development of heavy aircraft. To compromise the aerodynamic performance and structural behavior, a new configuration with thick airfoil, which increases the lift of the main wing by means of row-wings under the finite wing span, is designed and developed in this paper. Numerical simulation result indicates that the lift coefficient is able to be increased by 50 percent compared to the traditional single wing configuration. Moreover, with the optimization of setting proper installation angle to the posterior wing and scaling down the chord of the posterior wing, the lift-drag ratio is higher than the traditional configuration using thinner wings. The overall effect shows that the aerodynamic configuration researched in this paper provides valuable reference to the design and development of heavy aircraft.