翼尖连接机翼布局弹性气动力探讨

翼尖连接机翼(Joined Wing)布局将后掠的前翼和前掠的后翼在翼尖处用端板相连,后掠翼和前掠翼互相依存,克服平直机翼的局限,提高飞行临界M数,减小诱导阻力,抑制前掠翼的发散倾向.但是该布局的设计参数选择需要气动,结构强度,气动弹性等多学科综合分析,多学科设计优化还需要提供相对于气动设计参数的敏度.探讨了一种翼尖连接机翼布局包含发散速压和变形在内的刚性和弹性气动特性,以及对气动设计参数的敏度,可供该布局的多学科设计优化参考.

The exploration of elastic aerodynamics for a joined wing configuration

Joined wing configuration has the feature that the sweptback front wing and the sweptforward rear wing are connected at the wing tip by end plate. The sweptback wing and the sweptforward wing depend on each other for existence. It can overcome the fault of the straight wing, increase the flight critical Mach number, decrease the induced drag, restrainthe divergence tendency of the sweptforward wing. The selection of design parameters for such configuration need multidisciplinary synthetic analysis of aerodynamics, structure strength, aeroelasticity, etc. And the multidisciplinary design optimization (MDO) also need the sensitivity relative to the aerodynamic design parameter. An exploration was conducted for a joined wing configuration with rigid and elastic aerodynamic characteristics, divergence, deflections, and the sensitivity relative to aerodynamic parameter. The results can be for reference in multidisciplinary design optimization of such configuration.