二维凹槽置翼减阻技术实验研究

Experimental Research on the Effect of the Drag Reduction by Inserting an Airfoil in a Two-Dimensional Cavity

凹槽置翼是一种新型的减阻技术。针对不同雷诺数,在风洞中对凹槽置翼减阻特性进行了实验研究。结果表明,只要凹槽内机翼安装位置和姿态合适,就可以达到较好的减阻效果,减阻率为-5%～35%,而且减阻率随雷诺数的增加而减小。

An experimental research on the effect of the drag reduction by inserting an airfoil in a two-dimensional cavity was carried out under the different Reynolds number conditions in a closed-circuit wind tunnel. Experimental results showed that as long as the position and attitude angles of the airfoil are appropriately set up, better effect of drug reduction could be achieved. Based on the experimental data, the rate of drag reduction is -5%～35%. Results also show edthat the rate of drag reduction in all the three cases decreases with Reynolds numbers increasing.