为了在不增加燃烧室整体阻塞比的情况下提升流向涡强度,设计了一种尾部有压缩角的交替尾缘支板,并对不同结构支板喷注器的喷流流场和燃烧场进行了三维数值模拟。研究发现:支板尾部的压缩角对喷流流场产生了一定影响,并增强了交替尾缘结构诱导产生的流向涡强度;在尾部增加压缩角虽然带来了一定的总压损失,但是有效地提高了燃料的混合效率和扩散范围;从燃烧性能上看,添加尾部压缩角对燃烧室的燃烧范围和燃烧效率均有提升。

In order to increase the strength of streamwise vortices without increasing the choke ratio of combustor, this paper designs an alternating-wedge strut with a compression angle at the tail, Characteristics of non-reacting flow field and reacting flow field of different strut were investigated numerically. The results of numerical simulation show that: the compression angle at the tail affects the flow filed of injection and enhance the strength of streamwise vortices; Adding the compression angle at the tail results in more total pressure loss, but increases fuel mixing efficiency and diffusion range; From the perspective of combustion performance, the addition of compression angle significantly improves the combustion range and combustion efficiency of the combustor.