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为解决多斜孔壁应用于实际燃烧室时容易出现前端冷却效果较弱的问题,采用多斜孔非均匀孔排设计,对壁面前端的开孔分布规律进行了重点优化,采用数值模拟方法研究了不同孔排规律对冷却效果的影响。结果表明,非均匀孔排布设计可使流量分配规律得到优化,挖掘了壁面后端冷却气的冷却潜力,改善了壁面温度的均匀性,且控制在材料许用温度范围内;轴向温度梯度有所减小,同时冷却空气量明显减少;在开孔面积一定的前提下,采用增加孔数,减小孔径的方式能获得较佳的冷却效果。
In order to solve the problem that the front-end cooling effect tends to be weak when the multi-inclined hole wall is applied to the actual combustion chamber, the multi-inclined hole non-uniform hole row design is adopted to optimize the distribution of the hole at the front end of the wall. Numerical simulation methods are used Effect of Different Pore Pattern on Cooling Effect. The results show that the design of non-uniform pore arrangement can optimize the flow distribution law and excavate the cooling potential of the cooling gas at the back wall of the wall to improve the uniformity of the wall temperature and control the allowable temperature range of the material. The axial temperature gradient And the amount of cooling air is obviously reduced. Under the premise of certain opening area, a better cooling effect can be obtained by increasing the number of holes and reducing the aperture.