前掠翼根部流动分离的控制

CONTROL OF THE FLOW SEPARATION AT THE ROOT PART OF FORWARD-SWEPT WING(FSW)

在风洞和水洞中研究了机翼根部修形、活动边条、固定边条、边条襟翼和链接边条在控制前掠翼根部流动分离方面的作用。分析了上述措施对机翼流动的干扰机理及其对气动性能的影响。研究结果表明,各种措施对控制前掠翼根部流动分离均有明显效果,可提高大迎角升阻特性,改善纵向力矩特性和配平能力。固定边条和边条襟翼还可改善中小迎角的升阻性能,链接边条和边条襟翼则可使失速性能提高。加鸭翼后上述气动收益更加明显。

In this paper. the effects of inboard fairing, movable strake, fixed strake, strake flap and hinged strake to control the flow separation at the root part of FSW are investigated by wind tunnel and water tunnel testing results. The mechanism of aforesaid ways to control the flow separation and the effect on aerodynamic characteristics are discussed. These ways will remarkably control the flow separation at the root part of wing, raise the lift-drag characteristics at high angles-of-attack and improve the pitching moment behavior. Moreover. the fixed strake and strake flap will also improve the lift-drag characteristics at medium angles-of-attack, the hinged strake and strake flap will raise the stall behavior. These ways with the cooperation of canard make the aerodynamic characteristics more notable improvement.