摘要
利用有限体积法离散可压缩Euler方程,计算了带5种不同类型翼梢小翼的全机高速巡航外形。重点研究了不同小翼对飞机横航向静稳定性、机翼压力中心移动量和侧滑时滚转力矩系数随迎角变化的影响规律。研究结果表明:(1)翼梢小翼均不降低飞机的横向静稳定性,都将降低飞机的航向稳定性;(2)翼梢小翼均使机翼压力中心向外移动,小后掠角的传统小翼移动量最大,鲨鱼鳍型小翼的移动量最小;(3)小翼均没有改变全机滚转力矩系数随迎角的非线性变化趋势;(4)侧滑时滚转力矩系数随迎角的非线性变化主要是由于左右两翼作用力的差量引起的。
This paper has calculated the high-speed cruising aircraft shape with five different winglets by using the discreted compressible Euler equation, and studied the effect laws of the static lateral-directional stability, displacement of wing pressure center and the roll coefficient vs angle of attack during sideslip. The results show ： （ 1 ） Winglets would increase the static lateral stability and decrease the static directional stability; （2）Winglets would make the wing pressure center move toward outside, the displacement of traditional winglet with small sweepback angle is the biggest, the shark winglet is the least; （3）Winglets would not change the nonlinear roll coefficient trends vs angle of attack during sideslip ; （4） The nonlinear roll coefficient trends vs angle of attack during sideslip is mostly due to the asymmetry wing pressure.
出处
《飞行力学》
CSCD
北大核心
2011年第4期41-44,共4页
Flight Dynamics
关键词
翼梢小翼
横航向静稳定性
机翼压心
winglet
static lateral-directional stability
wing pressure center
