火灾烟颗粒的分形结构形状模拟与光散射计算

fractal shape model was used to simulate the morphology of fire smoke particles, as most of the particles had fractal structures intrinsically. The shape model , whose parameters, including the total primary particle number in an aggregate, the fractal dimension and the radius of the primary particles were obtained from a sequence of SEM images, was considered to be compatible with the smoke particle shape. The shape model was then used to compute the light scattering of smoke particles, and the results showed that, compared with the sphere particle with the same volume and other optical parameters, the fractal-like aggregate has smaller forward scattering and larger backward scattering.