偏转矢量喷流对双三角翼前缘涡破裂影响的实验研究

本文应用染色液流动显示技术对后缘偏转喷流情况下76°/40°双三角翼前缘涡破裂位置的变化进行了观测,实验结果表明偏转喷流主要推迟与喷流方向相同一侧前缘涡的破裂,而使另一侧前缘涡破裂略有提前.随着喷流偏转角度的增大,喷流使两前缘涡破裂位置差逐渐增大.另外,随着模型攻角的增大,前缘涡涡核与双三角翼翼面的夹角逐渐增大,导致偏转喷流的作用逐渐减弱.

Experimental Investigation for the Effects of Vectored Trailing-Edge Jets on the Leading-Edge Vortex reakdown of a Double Delta Wing

Dye-injection flow visualization technique is used to observe the leading-edge vortex breakdown of a double delta wing with the leading-edge vectored jets. It is found that the vectored jet may delay the leading-edge vortex breakdown in the jet direction, and makes the other leading edge vortex breaking down somewhat early, besides, the difference in the two leading-edge vortex breakdown positions increases with the jet angle. It is also found that with the increase of the angle of attack, the angle between the double delta wing surface and the leading-edge vortex increases, which leads to the action of vectored jets on the vortex breakdown weakened.