摘要
本文研究了受限空间近壁烟羽流的准稳态温度场。实验结果表明水平横截面上的温度分布近似于高斯分布,最高温度与到火源的距离之间的关系近似于非受限烟羽流中二者之间的关系,但两个系数不同。本实验得到c=7.3,n=-1.62。实验中还发现,当烟羽流的葛拉晓夫数Gr<2×10^(-7)时,烟羽流处于不稳定状态,同时给出了处于不稳定状态时的温度分布。
An experiment study of temperature distribution of quasi-steady state gas plume which is near the wall in bounded space, has been done. The experiment result shows that the temperature distribution on horizontal cross section approximate to Gaussens distribution. Relationship between maximum temperature on hor/zontal cross section and height from fire source approximate relationship of unbounded gas plume, but c=7.3, n=-1.62. When Grashof number is below 2×10~7, the gas plume must have instability.
出处
《火灾科学》
CSCD
1993年第2期1-5,共5页
Fire Safety Science
