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为了研究火焰筒上孔阵排列和偏转角对多斜孔壁冷却效果的影响规律,将多斜孔壁冷却结构应用到航空发动机的燃烧室火焰筒壁上,通过数值模拟研究了不同孔阵排列和不同偏转角的共6种多斜孔结构对火焰筒壁的冷却效果,包括有效温比和对流换热系数的比较。结果表明:在燃烧室上,孔阵排列对多斜孔壁冷却效果的影响与平板模型的规律一致,叉排孔阵排列优于顺排孔阵排列,孔排周向位移找到了冷却效果较好时的孔排周向位移值;在火焰筒前端,偏转角的选取应考虑到旋流器对流场的影响,而在火焰筒后端,偏转角为0°的冷却效果较好。
In order to study the influence of array and deflection angle of flame array on the cooling effect of multi-inclined wall, the multi-inclined cooling structure was applied to the flame wall of the combustion chamber of the aeroengine. And a total of six kinds of multi-oblique hole deflection angle of the flame wall of the cooling effect, including the effective temperature ratio and convection heat transfer coefficient comparison. The results show that the influence of array of array on the cooling effect of multi-inclined hole wall is consistent with that of the flat model in the combustion chamber. The arrangement of array of array of rows and columns is better than the array of array of array of rows and columns. In the front of the flame tube, the influence of the cyclone on the flow field should be taken into consideration in the selection of the deflection angle. At the rear end of the flame tube, the cooling effect with a deflection angle of 0 ° is better.