摘要
两相爆震燃烧的研究近来取得了较大的进步,但是仍有很多问题需要解决,诸如燃油的喷射、雾化和蒸发,燃油和氧化剂的混合,两相可爆混合物的短距离起爆等等．本文利用激光喷雾粒度分析仪分别就直射喷嘴与气动喷嘴研究了汽油的雾化情况,随着汽油流量的增加,两种喷嘴的雾化变化趋势相反．结合汽油、空气PDE模型机多循环爆震试验,发现汽油的粒度对模型机的爆震波速有较大的影响,粒度减小,波速增大,同时波速具有循环效应．
Although much work has been accomplished in two-phase detonation, the field is not as developed as gaseous detonations and many issues, such as the fuel injection, atomization and vaporization, the mixing of fuel and oxidizer, quick and short distance detonation initiation and so on, need to be conquered. This paper addresses the atomization processes for plain-orifice injector and twin-fluid air-assist atomizer. A particle size meter based on laser light scattering is employed to measure mean droplet size. And the relationships between droplet size and gasoline mass flux are available. The twin-fluid air assist atomizer can produce much smaller mean droplet size than plainorifice injector. Combining the atomization data with the multi-cycle detonation data based on a gasoline-air PDE model, droplet size of gasoline has a considerable effect on the gasoline-air detonation velocity. The detonation velocity increases as the droplet size decreases. And the detonation velocity tends to increase with the detonation sequence. However, the measured velocity is much lower than the ideal C-J velocity.
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2006年第6期1057-1059,共3页
Journal of Engineering Thermophysics
基金
国家自然科学基金资助项目(No.50336030)
关键词
雾化
两相
脉冲爆震
爆震波速
atomization
two-phase
pulse detonation
detonation velocity
