文氏管结构对旋流杯流动点火特性的影响研究  

Influence of Venturi Tube Structure on Flow and Ignition Characteristics of Swirl Cup

作　　者：姚尚军 YAO Shangjun(College of Energy and Power,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China)

机构地区：[1]南京航空航天大学能源与动力学院,江苏南京210016

出　　处：《机械制造与自动化》2025年第1期30-34,38,共6页Machine Building & Automation

基　　金：南京航空航天大学研究生科研与实践创新计划项目(xcxjh20210210)。

摘　　要：为了探究文氏管结构变化对某旋流杯燃烧室流动及点火过程火焰传播特性的影响,搭建单头部回流燃烧室试验平台,开展文氏管喉道位置与直径对冷态头部流场结构及点火过程火焰传播特性影响规律的试验研究。结果表明:文氏管喉道距旋流杯出口的距离增加,燃烧室头部低速回流区范围有所扩大,但流动结构基本不变;文氏管喉道直径缩小,燃烧室头部下回流区范围增幅明显,流动结构变化明显;点火过程中火焰存在明显阶段性变化,初始火焰往上游传播对点火成功有重要作用。在燃烧室总压损失3%的条件下,文氏管喉道距旋流杯出口的距离增加,点火延迟时间有所增加,但增幅不大,文氏管喉道直径缩小,点火延迟时间大大增加,增幅超118%。In order to explore the influence of Venturi tube structure change on the flow and flame propagation characteristics of a swirl cup combustor during ignition,a single-head reverse combustor test platform was built,and the experimental research on the influence of Venturi tube throat position and diameter on the cold head flow field structure and flame propagation characteristics during ignition was carried out.The results show that the distance between the Venturi tube throat and the swirl cup outlet is increased,and the range of low-speed recirculation zone in the combustor head is expanded,but the flow structure remains basically unchanged.The throat diameter of the Venturi tube is reduced,the range of the recirculation zone under the head of the combustion chamber is increased significantly,and the flow structure changes greatly.There is a significant staged change in the flame during the ignition process,and the initial flame propagation upstream plays an important role in the success of ignition.Under the condition of a total pressure loss of 3%in the combustion chamber,the distance between the Venturi tube throat and the swirl cup outlet is increased,and the ignition delay time is increased,but with no significant increase,and as diameter of the Venturi tube throat is decreased,and the ignition delay time is increased remarkablely with an increase of over 118%.

关 键 词：文氏管 旋流杯 PIV 流场 电火花点火 点火延迟时间 

分 类 号：V233.3[航空宇航科学与技术—航空宇航推进理论与工程]