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首页> 外文期刊>The Aeronautical Journal >The effects of apex flap on the leading-edge vortex breakdown of a cropped double delta wing
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The effects of apex flap on the leading-edge vortex breakdown of a cropped double delta wing

机译:顶点襟翼对裁剪的双三角翼前缘涡旋破坏的影响

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The dye-injection flow visualisation technique was used to investigate the effect of the apex flap on the leading-edge vortex breakdown over a cropped 76°/40° double delta wing. The angle-of-attack of the experimental model varied from 20° to 40°, and the length of the apex flap was 25%c and 50%c respectively. By changing the angle of the apex flap, we found that the apex flap is an efficient method to control the leading-edge vortex breakdown, and that there exists an angle of the apex flap at which the value of the leading-edge vortex breakdown delay reaches maximum. Moreover, it is found that, for α < 28°, the small apex flap is a better choice for delaying the vortex breakdown; for α > 28°, the large apex flap is superior to the small one.
机译:染料注入流动可视化技术用于研究顶点襟翼对裁剪的76°/ 40°双三角翼上前缘涡旋破坏的影响。实验模型的攻角从20°到40°不等,先端瓣的长度分别为25%c和50%c。通过改变顶点襟翼的角度,我们发现顶点襟翼是控制前沿涡旋破坏的有效方法,并且存在顶点襟翼的角度,在该角度处,前沿涡旋破坏的延迟值达到最大。此外,发现对于α<28°,较小的顶点襟翼是延迟涡旋破裂的更好选择。当α> 28°时,大的先端瓣优于小的。

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