【摘要】 目的　用计算机对柴油机排放的碳烟微粒结构进行模拟． 方法　利用分形理论，采用有限扩散凝聚模型（ＤＬＡ） 对微粒簇的结构参数进行计算． 结果　计算结果与实测的微粒簇尺寸分布的分维数和表面积分维数符合得较好． 结论　分形理论能够比较准确地得出柴油机微粒簇的结构参数．更多还原

【Abstract】 Aim The particle texture from diesel engine was imitated by use of computer. Methods The theory of fractal geometry and the diffusion limited aggregation model were used to simulate the micron texture. Results The fractal dimensions of granule distribution and corpuscle superficial area are quite conformed with those of measurement. Conclusion The texture parameters of engine particle cluster can be obtained precisely by use of fractal theory.更多还原