掺混孔结构对大曲率受限空间出口温度分布的影响

回流燃烧室的掺混射流在大曲率受限的弯管中与主流掺混，回流导致沿径向的压力梯度变化，增加了掺混流动的复杂性。为了研究不同掺混孔结构对掺混射流与主流在大曲率弯曲通道内的掺混规律，本文在有收缩比弯曲通道中多孔射流的出口温度分布测试中，对影响掺混冷却的各变化参数按照单一变量进行比对研究，对孔径、孔间距等掺混孔结构变量进行分析并提出最优的掺混孔设计经验，最后实验获得的三头部回流燃烧室的出口温度场的分布，初步验证作为回流燃烧室的掺混结构设计和优化的参考依据的可行性。

Effects of Dilution Hole Structure on Exit Temperature Distribution Characteristic in Large Curvature Limited Space

The dilution jet in small reverse flow combustor is mixing with the main flow in a large curvature limited space. The gas flow accelerates and flow direction turns sharply which results in complicated flow condition by a variation of radial pressure gradient. In order to study effect of structure of the dilution hole on transverse jet mixing temperature distribution characteristic in large curvature limited space, the exit temperature distribution experiment of multiple jets in contracting curved channel, each parameter variable has been comparative studied, which could influence the dilution mixing. The parameters of diameter of dilution hole, spacing between jets have been analyzed and summarized for the design experience. At last an experiment has been taken with the one of the design in a three injectors reverse flow combustor. The qualitative results of the dilution hole structure effect on the mixing could be a reference for the reverse flow combustor design and optimization.