融合于机体的两段可动式侧板流动控制技术研究

Flow Control Technique of Two Moving Strake Based on Blended Body Design

通过风洞实验,研究了基于前掠翼融合体无尾气动布局的一种新概念流动控制技术。针对大迎角机翼根部分离问题提出的两段可动式侧板流动控制技术,通过可动段与固定段前缘之间形成收缩型缝道,将机身下表面的高能气流引入上表面增强机体侧缘涡。研究结果表明,此项技术可以加强对机翼根部和后体流动的控制、减缓机翼根部分离、控制机头分离区,既提供俯仰控制力矩、又不损失升力,改善了失速特性,有利于纵向配平和俯仰控制。两段可动式侧板控制技术为无尾布局飞机设计提供了一条崭新的思路。

This paper investigates a new flow control technique based On a forward-swept wing blended body （FBB） tailless configuration by a wind tunnel. The two-moving strake （TMS） technique which is designed to solve the separating problem of forward-swept wing at high angle of attack with a slot formed by its moving part and fixed part. The slot leads high speed flow from a lower surface to an upper surface to enhance the side-strake body vortex. The results show that in this way the separating at wing-root can be controlled, at the same time the TMS can limit the separating area at head of a plane. In conclusion the TMS improves pitching characteristics while no lift decreases. This leads to great amelioration of the aerodynamic performance after stalling. It makes good efforts for longitudinal equilibrium and pitching control of the FBB tailless configuration. The conclusion of this paper can make a reference for other tailless configuration control