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提出了一种新型气动技术,其主要原理是:将机翼上表面的一部分翼面设计为活动翼面,当飞机进入降落阶段、迎角较大时,适当抬高该活动翼面,从而在该活动翼面后形成一个台阶,通过台阶中产生的稳定驻涡来控制机翼上表面的流动;与此同时,打开安装在机翼上的Gurney襟翼,可达到同时提高机翼升力和失速迎角的目的。将该技术在DLR-F4上应用,数值模拟结果表明:机翼的最大升力系数提高了17.37%;失速迎角从11°提高到13°,提高了18.18%。本文为提高飞机的着落性能探索出一种具有发展潜力的方法。
A new type of pneumatic technology is proposed. Its main principle is as follows: a part of the airfoil on the upper surface of the wing is designed as a movable airfoil. When the aircraft enters the landing stage and the angle of attack is large, the movable airfoil is properly raised so that at The active wing creates a step behind the wing that controls the stability of the wing’s upper surface through the steady vortices created in the steps. In the meantime, opening the wing-mounted Gurney flap achieves both lift and stall lift Angle of attack purposes. The technique was applied on DLR-F4. The numerical simulation results show that the maximum lift coefficient of the wing is increased by 17.37% and the angle of attack of attack is increased from 11 ° to 13 °, increasing by 18.18%. This paper explores a promising method for improving aircraft landing performance.