瓦斯爆炸后空间温度分布及热危害区域分析研究

为了获得瓦斯爆炸引发次生灾害的特性参数，建立了超压预测模型及爆炸后空气温度衰减模型，并结合实验数据进行了验证。结果表明:依据所建立的超压修正模型，不同浓度和体积下的超压在爆源附近呈对数形式快速下降，之后缓慢趋向平稳；基于模型修正的爆炸超压计算公式，能够很好的对各个情形的瓦斯爆炸超压进行计算，吻合较好。对初始瓦斯体积相对较小的情形吻合度很高，对于初始体积大的瓦斯爆炸超压在100 m附近会出现一定误差，但有一定指导意义。瓦斯爆炸热危害区域的研究，对瓦斯爆炸次生灾害的防治工作具有重要意义。

Study on spatial temperature distribution and thermal hazard area analysis after gas explosion

In order to obtain the characteristic parameters of the secondary disasters caused by gas explosion, a model of overpressure prediction and a model of air temperature attenuation after explosion were established, which were verified by the experimental data. The results showed that according to the established model of overpressure modification, the overpressure around the explosion source under different concentrations and volumes decreased rapidly with a logarithmic form, and tended to be stable slowly later. The gas explosion overpressure under various conditions could be calculated well based on the calculation formula of explosion overpressure modified by the model, with a good agreement. The agreement degree was very high when the initial gas volume was relatively small, but a certain error would appear around 100 m for the gas explosion overpressure with a large initial volume, but it had a certain guiding significance. The research on the thermal hazard area of gas explosion has important significance to the prevention and control of the secondary disasters caused by gas explosion.