摘要
将Hartmann-Sprenger(H-S)管集成到传统射流装置中形成激励射流,研究其在超声速流场中的混合特性.设计了3种频率的CO_2激励射流,将其横向注入Ma=2.5的均匀超声速来流当中.采用平面激光散射技术对其进行瞬态可视化成像,利用组分采样进行时均分析.结果表明:H-S激励射流可以有效提高射流穿透深度,形成较多大尺度结构,从而获得较好的混合效果.
Hartmann-Sprenger（H-S） tube could generate oscillated flow with high frequency and high amplitude under JRG mode.This article made an excited jet by putting H-S tube into the traditional jet device to investigate its effects on the supersonic mixing.The CO_2 jets excited under three different frequencies were injected into the Mach 2.5 supersonic flow.Planar laser scattering was used to visualize the instantaneous flow while sampling the concentration of CO_2 was used to obtain the time-averaged results.The results showed that the excited jet improved the depth of jet penetration,and made much more large-scale structures,so that it got better mixing in the supersonic flow,especially in the 1 kHz-excited case.
出处
《力学学报》
EI
CSCD
北大核心
2010年第5期957-961,共5页
Chinese Journal of Theoretical and Applied Mechanics
基金
国家自然科学基金资助项目(90305022
10525212
10621202)~~
关键词
激励射流
超声速混合
穿透深度
大尺度结构
excited jet
supersonic mixing
depth of penetration
the large-scale structure
