细水雾与欠膨胀氢气喷射火相互作用的实验研究

Experimental study of the interaction of water mist with under-expanded hydrogen jet flames

文章对细水雾与欠膨胀氢气喷射火的相互作用进行了一系列实验研究,重点研究在不同的细水雾压力和竖直释放高度下,喷射火的火焰形态、火焰长度、温度场以及辐射场的变化情况。结果表明:在细水雾的作用下,火焰将发生偏折,并且火焰折角随细水雾压力的增大而增大;细水雾压力较小时,火焰出现膨胀现象,火焰水平长度有所增大;随着细水雾压力的增大,火焰长度逐渐减小;不合适的施加细水雾可能会导致火焰温度场和辐射场增强,进而带来潜在的二次危害危及人们的生命财产安全。

A series of experiments were performed on the interaction of water mist with horizontal under-expanded hydrogen jet flames.The effects of various water mist pressures and vertical release positions on flame pattern,length,temperature,and radiant heat flux were studied.The results show that water mist causes the flame to be tilted,and the tilt angle of the flame increases with increasing water mist pressure.When the water mist pressure is small,the flame expands,and the horizontal length of the flame increases.As the water mist pressure increases,the horizontal length of the flame gradually decreases.It is also found that an inappropriate application of water mist may lead to the enhancement of flame temperature and radiation,which will bring potential secondary hazards and endanger people’s lives and property.