Abstract
TEM photographs of diesel soot particles, i.e., aggregates sampled from two 3 liter diesel engines were analyzed. The photographs show that particles sampled from 1998 model year engine have chain-like shapes, while those from 2004 model year engine have spherical shapes. The mean radius of gyration of soot aggregates, Rg, was measured by a laser-scattering method. The result show that Rg increases with the increase in soot mass concentration, probably due to the increased collision frequency.
