摘要
提出利用垂直横喷射流引入流向旋涡来增强氢和空气的混合。射流中心剖面速度分布和射流轴线最大速度衰减的五孔探针测量结果表明，单孔射流与来流空气的动量比越大，混合越迅速。二维射流的混合要比三维射流差的多。单排多孔射流在一定的孔面积和流量比下，协调孔距、通道高度和射流动量比的关系，就可获得射流与来流空气的最佳混合，然后据此确定喷孔直径和数目。首次引入三维垂直射流旋涡穿透深度的概念，这比最大速度穿透深度更具实际意义。
Using Vortex Generator Jets to enhance the mixing of gaseous fuel jets and air inlet flow was investigatedThe velocity profile at air jet central symmetry and axial maximum velocity decay measured by fivehole probe quantified the mixing ratesThe higher the momentum ratio of single hole jet,the quicker the mixingThe rate of mixing of slot jet was very slower than circular hole transverse jetIt was found that streamwise vortex has a significant effect on the mixing rates,the fast jet mixing could be acquired by adjusting orifice distance,duct height and jet momentum ratioAn important concept Vortex Penetration Depth is first introduced
出处
《推进技术》
EI
CAS
CSCD
北大核心
1998年第3期52-56,共5页
Journal of Propulsion Technology
关键词
横流
气体喷射
氢燃料
冲压喷气发动机
Cross flow,Gas injection,Swirl,Mixing,Hydrogen fuel,Ranjet engine
