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本文根据低速风洞所取得的测力、油流观察及旋涡测量结果,研究了前掠翼鸭式布局的鸭翼平面形状及其位置对气动性能影响的机理。研究表明,前掠翼布局大迎角气动性能的提高取决于鸭翼、主翼前缘涡的相对位置及其相互控制,也就是它们间的相互干扰。文中根据前掠及后掠鸭翼与主翼组合的实验结果,提出了采用鸭式布局时鸭翼应具有的平面形状及合适的位置选择范围。文中还对双前掠翼布局提出了一些看法。解释了加鸭翼后精侧气动性能出现反常变化的原因。
In this paper, based on the measured force, oil flow observation and vortex measurement results obtained from low speed wind tunnel, the mechanism of the influence of the plane shape and position of duck-wing with forward-swept wing-duck layout on aerodynamic performance is studied. The research shows that the improvement of the aerodynamic performance at the high angle of attack of the forward swept wing depends on the relative positions of the canard wing and the leading edge vortex of the main wing and their mutual control, that is, the mutual interference between them. According to the experimental results of the combination of the front swept and the swept canard wing and the main wing, the plane shape of the canard wing and the suitable range of position selection when the canard layout is adopted are proposed. The paper also made some observations on the layout of the twin forward swept wings. Explain the reason why the aerodynamic performance of the fine side increases abnormally after adding the canard wing.