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对40°前缘后掠角的主翼和40°前缘后掠角的鸭翼所构成的近距耦合鸭式布局简化模型进行了风洞测力、测压实验,系统研究了鸭翼展向脉冲吹气的增升效果,给出脉冲吹气频率以及脉冲宽度与布局升力之间的变化关系。测力结果表明,鸭翼展向吹气提高了该布局在大迎角时的升力,延迟了失速。测压结果表明,鸭翼展向脉冲吹气改善了中大迎角时主翼翼面流态,增加了翼面吸力峰值,延缓了涡的破裂。这说明利用鸭翼展向脉冲吹气涡控技术,可以直接改善鸭翼流场,继而间接改善主翼流场。
Wind tunnel measurement and pressure measurement experiments were carried out on the simplified model of short-distance coupled duck canard consisting of the main wing with the leading edge of 40 ° leading edge and the canard wing with the leading edge of 40 ° leading edge. The effect of the pulsating air blowing is given as a function of the pulsating pulsation frequency and the relationship between the pulse width and the layout lift. Force measurement results show that the duck wing span inflatable improves the lift of the layout at a high angle of attack and delays the stalling. The results of manometry show that the pulse blowing of canard wings improves the flow pattern of the main wing at mid-high angle of attack, increases the peak value of airfoil suction, and delays the vortex rupture. This shows that the use of canopy wings to the inflatable pulse eddy current technology can directly improve the canard wing flow field, and then indirectly improve the main wing flow field.