机翼扭转和副翼偏转横滚操纵比较研究

机翼扭转和经典副翼后缘偏转都是未来可能的智能机翼横滚操纵方案。采用Fluent仿真软件对扭转式机翼与经典副翼构型机翼进行了对比研究,主要分析两者在升阻性能、横滚操纵力矩、压力分布等方面的差异和特征规律,得到了扭转变形机翼相对副翼舵面的横滚操纵当量作用和气动优势。所设计的机翼方案由于扭转式机翼横滚操纵的机翼变形连续性以及所需扭转角度较小,易于保持流场的附着和稳定,所以达到相同横滚力矩系数,扭转式机翼所需扭转角度为副翼偏转角度的30%~50%左右,并且升阻比显著优于副翼式机翼,而且随着操纵角度增大优势更加明显,在大舵角操纵时扭转式机翼升阻比超过副翼式机翼约一倍。

Comparative research of roll control between wing torsion and aileron deflection

Wing torsion and classic aileron trailing edge deflection are both possible intelligent wing roll control methods in the future. The comparison between torsional wing and classical aileron wing was carried out by Fluent simulation. The differences and characteristics of the two wings in lift-drag performance, roll moment coefficient and pressure distribution were analyzed, and the roll control equivalent effect and aerodynamic advantage of the torsional wing compared with the aileron were obtained. The results show that, due to the continuity of wing deformation and the small torsion angle required by the torsional wing roll control, it is easy to keep the flow field attached and stable under the wing defined in the paper, so the same roll moment coefficient is achieved. The required torsion angle of the torsional wing is about 30% -50% of the aileron deflection angle, and the lift-drag ratio of the torsional wing is significantly better than that of the aileron wing. With the increase of the control angle, the advantage becomes more obvious, and the lift-drag ratio of the torsional wing is about twice that of the aileron wing when the control angle is large.