Abstract
ABSTRACT Particle emission fluctuation was studied experimentally with a free convection diffusion flame, which used primary reference fuels consisting of n-heptane and iso-octane. The smokeless weak turbulent flame was turned into a smoky strong turbulent flame by disturbing it with a tangential airflow. A diffusion charger (DC) particle sensor was used to measure the transient particle mass (PM) emissions. The turbulence increased the PM significantly, particularly for a higher fraction of iso-octane fuel. Statistical results showed that the PM fluctuation follows the chi-square distribution. Furthermore, the theoretical analysis proved that the PM is related with the square of the fluctuation velocity.
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