In the present study, the influence of different particle aggregation models on the fly ash particle aggregation process of a turbulence aggregation device has been studied. The influence of an interparticle repulsive potential energy barrier, U-max, on the rate of aggregation was considered, and capture efficiency, f (alpha), was introduced to correct the ideal turbulence aggregation kernel. The simulation results of an ideal turbulence aggregation model and a corrected turbulence aggregation model were compared to the experimental results, and showed that the error between the ideal turbulence aggregation model and experimental results was approximately 8%; whereas, the error between the corrected turbulence aggregation model and experimental results was only 3%. Brownian aggregation cannot be ignored in the turbulence aggregation of the particles less than 2 mu m in diameter. The coupled corrected turbulence aggregation and Brownian aggregation model coincided well with the experimental results.