超声速气流中的煤油喷雾研究

为了强化液体燃料超声速燃烧 ,注入的液体燃料以喷雾 (SprayAtomization)的方式 ,以便加速蒸发和混合。油雾直观图像对研究喷雾燃烧的内部复杂现象有很大帮助。由于实验上的困难 ,超声速气流中的喷雾图像较为罕见。笔者给出超声速气流中显示煤油喷雾的一种简单、实用方法。实验在一直联式超声速燃烧实验装置上进行 ,实验结果表明 ,煤油射流垂直注入超声速气流产生的油雾发展过程与气体射流基本相似 ,喷雾穿透深度与扩张随压力雾化喷嘴的压力增加而增加

Investigation of kerosene spray atomization in supersonic flow

In order to intensify the combustion of kerosene in a supersonic airflow,the kerosene is usually injected by spray atomization,which can enhance the kerosene evaporation and mixing.Directly visualizing kerosene spray atomization is helpful for investigation of the complex phenomena in the spray atomization,but it is difficult to realize it in the supersonic airflow.So that the picture of kerosene spray in supersonic flow has been seldom reported.A simple and useful method of visualizing kerosene spray atomization in supersonic flow was given.The experiments were conducted by using of a direct connect supersonic combustion test facility.The characteristics of penetration and spreading rate of kerosene spray atomization in a transverse supersonic flow were investigated.