Authors
Thang Q. Dam and John M. E. Storey
Publication
Proceedings of the 2002 Technical Meeting of the Central State Section of
the Combustion Institute, Knoxville, TN, April, 2002
Abstract
Nanoparticles form in exhaust via many processes including condensation, homogenous nucleation, coagulation and adsorption. After being released from the exhaust into a dilution tunnel or dilution sampler, new nanoparticles also might be formed due to nucleation growth from low dilution ratio and long residence time. On the other hand, nanoparticles might be formed solely from the dilution process. Artifact formation in dilution tunnels occurs due to specific problems with the dilution process, such as dilution ratio, dilution air temperature, dilution air pressure, residence time and critical flow orifice. This paper describes a variable residence time, micro dilution system for engine exhaust dilution. Results showed the effect of several dilution parameters on particle size distribution.
|
