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利用油流法和烟线法相结合的流动显示技术对不同斜掠角和迎角组合下的斜置平板进行了流场显示和和天平测力实验研究。油流显示结果揭示了斜置平板表面分离流动和再附流动的流动特征;烟线显示结果则揭示了斜置平板周围的涡系结构,从而解释了油流显示中所观察到的现象。通过天平测力,我们得到了斜置平板的滚转力矩特性和升力特性。实验结果表明:在小迎角下,随着模型斜掠角度的增加,一条展向发展的涡流动生成于模型的后掠段,该涡流动使滚转力矩保持为相对较小的正值;大迎角下,从斜置平板模型的前掠尖点生成了一股沿展向发展的涡流动,且随着模型斜掠角度的增加,涡流动的影响范围从模型的前掠段扩展到了后掠段,从而使滚转力矩先减小后增大。
The flow field display and the balance force measurement experiment were carried out on the sloping plates under the combination of the oil flow method and the flue line method. The results of the oil flow reveal the flow characteristics of the separation flow and the re-flow of the inclined plate surface. The results of the smoke display reveal the vortex structure around the inclined plate, thereby explaining the phenomenon observed in the oil flow display. Through the balance force measurement, we got the rolling plate torque characteristics and lift characteristics. The experimental results show that at a small angle of attack, a swirling flow develops in the backward swept section of the model with the increase of the rake angle of the model. The eddy current keeps the rolling torque at a relatively small positive value. At high angle of attack, an eddy flow developed along the span direction was generated from the pre-cursor point of the inclined plate model. As the model’s rake angle increased, the influence range of eddy flow expanded from the front sweep of the model to After the swept segment, so that the rolling torque decreases first and then increases.