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为改善超燃冲压发动机燃烧室冷却系统的流动换热综合性能,研究了再生冷却通道的优化设计。针对当前冷却系统难以在获得较高冷却效率的同时保持较小的流动压力损失,在建立的一维流动传热数值模型基础上,采用混合罚函数法,以通道高度、宽度、内壁和肋片厚度为待优化变量,以平均努塞尔数与平均流动阻力系数之比—f函数作为优化目标,对再生冷却通道进行优化设计。计算结果分析表明:优化后的冷却通道综合性能得到明显改善,采用f值作为评价冷却通道综合性能的参数是合理的。
In order to improve the overall performance of the heat transfer in the combustion chamber of a scramjet, the optimal design of the regenerative cooling channel was studied. For the current cooling system, it is difficult to maintain a small flow pressure loss while obtaining higher cooling efficiency. Based on the established one-dimensional numerical model of flow and heat transfer, a mixed penalty function method is used to calculate the channel height, width, The thickness is the variable to be optimized. Taking the ratio of the average Nusselt number to the average flow resistance coefficient as the optimization target, the regenerative cooling channel is optimized. The calculation results show that the comprehensive performance of the optimized cooling channel is obviously improved, and it is reasonable to use the f value as the parameter to evaluate the comprehensive performance of the cooling channel.