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在现有文献的基础上,采用k-ωSST湍流模型和SIMPLE数值模拟算法,进一步探讨增加宽度比的三角柱体对于角区马蹄涡的影响。结果显示当三角柱体宽度在一定范围内增加时,马蹄涡的控制效果得到进一步提高。定义的涡强系数(基于涡心位置及马蹄涡的涡量)能很好地表征马蹄涡的强度。当三角柱体宽度与机翼厚度相同时,即宽度比为b/T=1(b为三角形宽度,T为机翼最大厚度)时涡强系数降到原来的27%。文中的三角柱体的高度仅为机翼厚度的1/20,和当地边界层的厚度相当。此种三角柱既能控制马蹄涡,又不会引起流场的整体剧烈变化。
Based on the existing literature, the k-ωSST turbulence model and the SIMPLE numerical simulation algorithm are used to further investigate the effect of triangular cylinder with increasing width ratio on the horseshoe vortex in the corner zone. The results show that when the triangular cylinder width increases within a certain range, the control effect of horseshoe vortex is further improved. The defined eddy-covariance (based on the center of the vortex and the vorticity of the horseshoe vortex) can well characterize the strength of the horseshoe vortex. When the width of the triangular prism is the same as the thickness of the wing, ie, the width ratio is b / T = 1 (where b is the width of the triangle and T is the maximum thickness of the wing), the coefficient of vortices drops to 27% of its original value. The height of the triangular cylinder in this paper is only 1/20 of the wing thickness, which is equivalent to the thickness of the local boundary layer. Such triangular columns can control horseshoe vortex, but also will not cause the dramatic changes in the overall flow field.