基于Taguchi方法的微小通道性能分析与参数优化

以高效、紧凑、轻质的航空燃油换热器为研究背景，对影响微小通道换热和压力性能的多种工况条件和结构参数进行探究和优化。应用Taguchi方法的正交实验设计和损失函数分析，得到不同因子对性能指标的贡献度和影响规律，并通过可加性检验证明结论具有统计显著性。结果显示，入口流速和通道流型对微小通道传热和压力性能的贡献度最大，通道流型选择圆柱旋涡发生器通道能获得最佳综合性能。此外发现，换热过程中工质的物性变化会影响普朗特数计算，导致多种传热压力性能和综合性能的评价指标有不同影响规律和不同优化参数组合，因此研究时需要根据实际问题选择恰当的评价指标。

Performance analysis and parameter optimization of mini-channel using Taguchi method

In the pursuit of high efficiency, compact and light aviation fuel heat exchanger, various working conditions and structural parameters affecting the heat transfer and pressure performance of mini channel were explored and optimized. By using orthogonal design of Taguchi method and loss function analysis, the contribution and influence of different factors on the performance index were obtained, and the conclusion was proved to be statistically significant by additivity test. The results showed that the inlet velocity and channel flow pattern contribute the most to the heat transfer and pressure performance of the mini channel, and the cylindrical vortex generator channel could obtain the best comprehensive performance. In addition, it was found that the change of physical property of the working medium in the process of heat transfer would affect the calculation of Prandtl number, resulting in different influence laws and different optimization parameter combinations of various evaluation indexes of heat transfer pressure and comprehensive performance. Therefore, it was necessary to select appropriate evaluation indexes according to practical problems.