航空发动机加力燃烧室跨流气冷稳定器流场研究

针对1种航空发动机加力燃烧室用引气冷却的跨流稳定器结构形式,采用标准k-ε湍流模型数值模拟方法,对其流场结构进行了分析和研究,将数值计算结果与封闭风洞中PIV流场测试结果进行了对比。结果表明:跨流气冷稳定器流场结构复杂,呈3维分布,环形稳定器后方的流场结构与普通钝体的类似,带后掠角的径向稳定器后方回流区与环形稳定器回流区互相耦合为整体,与沿环形稳定器展向的回流区形成高度一体的复杂回流区结构,形成稳定的低速区,起到良好的火焰稳定作用。

Study on Flowfield of Air Cooled Flameholder for Aeroengine Afterburner

Aiming at the air cooled flameholder structure of an aeroengine afterburner,the flowfield structure was analyzed by the standard k-ε tuebulence model,and the results were compared between the simulation calculation and the PIV measurement.The results show that the flowfield structure of air cooled flameholder is complicated,and the flowfield distributes with 3D structure.Flowfield structures of ring flameholder are similar as recirculation zones of V-gutter.Recirculation zones of radial flameholder with sweepback are coupled with ring flameholder.Recirculation zones of ring flameholder in spanwise form a huge integrated complex flowfield with recirculation of ring flameholder as low velocity zones,which stabilize the flame.