【摘要】 <正> 大攻角时,绕尖前缘细长弹翼上的附面层从前缘分离而形成脱体涡,对于翼-身组合体,除了弹翼上产生脱体涡以外,在弹身背风面上的气流亦发生分离而形成脱体涡(如图1所示),在这些涡系的作用下,使弹翼或翼-身组合体的气动特性随攻角呈非线性变化。更多还原

【Abstract】 Aerodynamic characteristics of wings and wing-body combinations with shedding vortices flow pattern are calculated numerically at high angles of attack in low subsonic flow. In the paper the potential theory is based on the vortex-element iteration method. The quadrilateral vortex-ring of the constant strength is distributed on the wing. The shedding vortices for the wing are simulated by "vortex-steps", this is, the free vortices of the horse-vortex consist of a number of "vortex-element". The sources arid sinks and elementary vortices are distributed on the axis of the body.The body vortices are simulated by the horse-vortices shedding from the maximum cross section of the nose of the body along the direction of the free stream flow. The unknew quantities of the problem are the strengths of vortices, sources and sinks, elementary-vortices and the paths of vortices elements in the wake. These are dertermined by the boundary conditions.更多还原