NDLI: A multi-probe thermophoretic soot sampling system for high-pressure diffusion flames.

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A multi-probe thermophoretic soot sampling system for high-pressure diffusion flames.

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A multi-probe thermophoretic soot sampling system for high-pressure diffusion flames.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Gülder, Ömer L. Vargas, Alex M.
Description	Country affiliation: Canada Author Affiliation: Vargas AM ( Institute for Aerospace Studies, University of Toronto, Toronto, Ontario M3H 5T6, Canada.); Gülder ÖL ( Institute for Aerospace Studies, University of Toronto, Toronto, Ontario M3H 5T6, Canada.)
Abstract	Optical diagnostics and physical probing of the soot processes in high pressure combustion pose challenges that are not faced in atmospheric flames. One of the preferred methods of studying soot in atmospheric flames is in situ thermophoretic sampling followed by transmission electron microscopy imaging and analysis for soot sizing and morphology. The application of this method of sampling to high pressures has been held back by various operational and mechanical problems. In this work, we describe a rotating disk multi-probe thermophoretic soot sampling system, driven by a microstepping stepper motor, fitted into a high-pressure chamber capable of producing sooting laminar diffusion flames up to 100 atm. Innovative aspects of the sampling system design include an easy and precise control of the sampling time down to 2.6 ms, avoidance of the drawbacks of the pneumatic drivers used in conventional thermophoretic sampling systems, and the capability to collect ten consecutive samples in a single experimental run. Proof of principle experiments were performed using this system in a laminar diffusion flame of methane, and primary soot diameter distributions at various pressures up to 10 atm were determined. High-speed images of the flame during thermophoretic sampling were recorded to assess the influence of probe intrusion on the flow field of the flame.
ISSN	00346748
Issue Number	5
Journal	Review of Scientific Instruments
Volume Number	87
e-ISSN	10897623
Language	English
Publisher	American Institute of Physics
Publisher Date	2016-05-01
Publisher Place	United States
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Discipline Physics Discipline Chemistry
Content Type	Text
Resource Type	Article
Subject	Medicine Instrumentation

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