CUED Publications database

Probe sampling to map and characterize nanoparticles along the axis of a laminar methane jet diffusion flame

Kazemimanesh, M and Moallemi, A and Olfert, JS and Kostiuk, LW (2017) Probe sampling to map and characterize nanoparticles along the axis of a laminar methane jet diffusion flame. Proceedings of the Combustion Institute, 36. pp. 881-888. ISSN 1540-7489

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Abstract

Nanoparticles generated by a laminar CH jet diffusion flame were examined by direct sampling through the pinhole of a probe and sized with a nano-scanning mobility particle sizer. Results showed that the particle size distributions (PSD) were strongly influenced by sample dilution immediately after extraction. Within the flame the soot PSD became dependent of dilution ratio until the sample was diluted several thousand times depending on initial concentration within a few milliseconds of extraction. High spatially resolved experimental results at different heights typically 1 mm apart along the central axis of the flame showed the evolution of PSD for particles larger than 2 nm covering early nucleation and growth to oxidation regions. Moving upward from the fuel-side the PSD in the particle nucleation region was bimodal and gradually turned into a unimodal PSD with a median of 10 nm due to particle growth. The PSD became bimodal again at nearer to the visible flame with the larger-diameter mode growing in magnitude and being made up of ever-larger particles while the smaller-diameter mode gradually decreased in size until it vanished. 4

Item Type: Article
Subjects: UNSPECIFIED
Divisions: Div A > Energy
Depositing User: Cron Job
Date Deposited: 20 Dec 2019 20:38
Last Modified: 13 Apr 2021 09:20
DOI: 10.1016/j.proci.2016.06.169