细水雾抑制扩散火焰的数值模拟

Numerical simulation of water mist on diffusion flames

通过实验和数值模拟研究了细水雾抑制扩散火焰的作用过程,探讨了细水雾抑制扩散火焰的机理和规律。细水雾抑制扩散火焰主要是通过水雾的蒸发潜热吸热、热容吸热、稀释氧气等作用,达到控制和扑灭火灾的目的。在实验的基础上,进行了一维数值模拟,其模拟结果与实验数据的物理趋势基本一致,验证了实验结果的合理性。

The process of water mist on diffusion flame has been experimentally studied and numerically simulated. And the mechanism and rules of water mist suppression are explored. The water mist suppresses diffusion flame through heat absorption due to the latent of vaporization of water mist, the heat absorption due to the heat capacity and the effect of dilution of oxygen, which slow down the reaction and fire spread. The one-dimensioned model based on experiments is carried out. The simulated results are identical with physics trends of the experiment data and validate the rationality of the results.