摘要
设计了细水雾底部伴流喷射抑制CH4射流火焰的实验平台。通过实验研究了底部伴流喷射细水雾对射流火焰形态、温度、辐射强度和熄灭过程的影响规律。研究表明,随着细水雾雾化压力的增加,CH4气体射流火焰高度降低,火焰摆动幅度增,在不同细水雾雾化压力下,无量纲火焰高度L*与Fr数依然可以拟合为同一形式的函数关系式;随着细水雾雾化压力增加,火焰峰值温度和高温区的范围逐渐减少,辐射强度大幅度的降低;细水雾底喷伴流条件下,CH4气体射流火焰的熄灭可以分为摆动熄灭和推举熄灭。
An experimental platform for study the CH4 jet flame suppressed by water mist is designed. The influence of bottom spray water mist on the shape, temperature filed, radiation intensity and extinguishing process of the jet flame is studied experimentally. The results show that with the increase of water mist pressure, the flame height of the CH4 jest flame is reduced and the amplitude of the flame oscillating is increased. The dimensionless flame height L* and Fr can still be fitted as formulas of the same form for different water mist atomization pressure. With the increase of atomization pressure, the flame peak temperature, the high-temperature region and the radiant intensity decrease gradually. The extinguishment of CH4 gas jet flame can be divided into two types: oscillating extinguishment and lift-off extinguishment.
出处
《科技通报》
2018年第10期205-209,共5页
Bulletin of Science and Technology
基金
国家自然科学基金资助项目(No.51604215)
中国博士后面上基金(2016M590962)
