瓦斯爆炸火焰的分形特性

Fractal Characteristics of Flame Front Surface in Gas Explosion

通过高速纹影图像从细观角度详细研究了不同传播条件下瓦斯爆炸火焰前锋的细微结构.实验及理论分析表明,瓦斯爆炸火焰有很好的分形特征.瓦斯爆炸火焰分形维数直接反应了火焰前锋皱折对火焰传播的影响.计算出的分形维数是衡量湍流火焰传播速度以及爆炸强度的有效参数.

Using high speed schlieren photographs the microstructure of flame front surface in gas explosion was studied from the microscopic view. By the experiments and theory analysis it is found that the flame of methane/air combustion has typically fractal characteristics, and the fractal dimension of flame front surface directly reflects the effects of the wrinkle flame front surface on flame propagation. The results indicate that the fractal dimension of flame front surface is an important parameter. It can reflect the flame propagation speed and evaluate the explosion intension.