旋流杯一级旋流数变化对点火性能的影响  

Effect of swirl cup's primary swirl number on ignition performance

作　　者：刘桂桂[1] 林宇震[1] 胡好生[2] 王晓峰[1] 张弛[1] 

机构地区：[1]北京航空航天大学能源与动力工程学院航空发动机气动热力国家级重点试验室,北京100191 [2]中国航空工业集团公司中国航空动力机械研究所,株洲412002

出　　处：《北京航空航天大学学报》2015年第6期1117-1121,共5页Journal of Beijing University of Aeronautics and Astronautics

摘　　要：所有的旋流杯结构均为一级多斜孔和二级径向直叶片,喷嘴均为单油路离心喷嘴.为了研究旋流杯空气雾化喷嘴一级旋流数对小型燃烧室点火性能的影响,采用单头部矩形回流燃烧室,在进口为常温常压、燃烧室压降为0.5%～5%的条件下,对3个一级旋流数不同的旋流杯进行了点火实验.实验结果表明：一级旋流数对点火性能影响明显,相同压降下,一定变化范围内,一级旋流数的增加影响了下游流场的分布,有利于火核沿回流区向上游传播,并在旋流杯出口形成稳焰,因此一级强旋旋流杯点火性能更好.All swirl cups have the same primary inclined multi hole and secondary radial straight blade and a simplex pressure atomizer. The effects of primary swirl number of airblast atomizer on small combustion ignition performance were examined. The ignition experiments for swirl cups with three different primary swirl numbers were conducted under atmospheric pressure and temperature in a rectangular reflux combustion chamber,and the pressure drop across the flame tube was between 0. 5% and 5% of inlet total pressure. The experimental results show that the primary swirl number significantly influence the ignition performance. Under the same pressure drop,within a certain range,the increase of primary swirl number affects the downstream flow field distribution,which is beneficial for fire nuclear spreading along the upstream of recirculation region and forming a steady flame in the swirl cup exit. So the swirl cup with strong primary vortex has better ignition performance.

关 键 词：航空发动机 小型燃烧室 双级旋流杯 一级旋流数 点火性能 实验研究 

分 类 号：TK231.2[动力工程及工程热物理—动力机械及工程]