利用前缘旋转控制边条翼外翼分离

CONTROL OF SEPARATED FLOW OVER A STRAKE WING BY MOVING SURFACE

边条翼在边条较小时中等迎角以上外翼就会出现分离，现提出用转动前缘表面来控制边条翼外翼分离。通过测力、油流和烟丝实验研究了转动前缘对机翼气动特性的影响。结果表明，在这种机翼上转动前缘对控制分离是有效的，升力增量最大可达３０％。可以预期，转动前缘与边条的综合作用。

It is well known that there is always a separation zone in the outer panel of a strake wing at large angles of attack, which leads to lower aerodynamic efficiency. In order to improve aerodynamic characteristics of the strake wing, moving surface which is part of a rotating cone was set close to the leading edge of the out wing. Visualization tests with oil flow and smoke wire and force measurement results have shown that the separation zone could be suppressed to a large extent. The maximum lift coefficient could be raised by 30%. It has been shown that moving surface is an excellent technique to control separated flow over the strake wing.