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The Particle Track Method of Measuring Flame Rise Velocity Tested Experimentally in CO-Air Flames

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Abstract:

The rise velocity of premixed, laminar flame gases flowing in one (vertical) direction is usually measured using the particle track method. Our investigations in CO-air flames of about 2000 K with uniform rise velocities of about 15 m s-1 showed that the most suitable substance for velocity measurements was powdered molybdenite (MoS2). Under our experimental conditions the velocity of the solid particles increased with the height of measurement in the flame due to relaxation effects. The flame rise velocities we have determined experimentally could be reconciled, with allowance for the effects of gravity and relaxation, with those we have calculated from flame data.

Keywords: Flame rise velocity; Particle velocity measurements; Warnings and provisos with regard to the particle track method

Document Type: Research Article

DOI: https://doi.org/10.1366/0003702804731023

Affiliations: Fysisch Laboratorium, Universiteit Utrecht, Princetonplein 5, The Netherlands

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