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Flow, Turbulence and Combustion

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12-06-2019 | Original research

Flameless Combustion Characteristics of Producer Gas Premixed Charge in a Cyclone Combustor

Authors: Lemthong Chanphavong, K.A. Al-Attab, Z. A. Zainal

Published in: Flow, Turbulence and Combustion | Issue 3/2019

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Abstract

Producer gas (PG) flameless combustion in a premixed cyclone combustor was investigated experimentally and numerically. The experiment was carried out over different premixed charges of air/fuel mixture and inlet nozzle diameters under PG fuel input power up to 80 kW. Exhaust temperature was above 1050 K for the whole operating range with CO emission below 0.08 Vol.% and NOx emission of 420 ± 30 ppm. Swirl flow field, internal hot flue gas recirculation, and temperature distributions inside the combustor were numerically studied. The numerical results were validated by the experimental data and it confirmed the achievement of temperature uniformity throughout the combustion volume when operated under flameless combustion mode. The reaction regime of PG flameless combustion was further analyzed with respect to turbulent scale characteristics. The present PG flameless combustions were typified by both moderate Damköhler and Karlovitz numbers, falling into the Flamelets in eddies regime.

previous article Large Eddy Simulation of Combustion and Heat Transfer in a Single Element GCH4/GOx Rocket Combustor

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Title: Flameless Combustion Characteristics of Producer Gas Premixed Charge in a Cyclone Combustor
Authors: Lemthong Chanphavong
K.A. Al-Attab
Z. A. Zainal
Publication date: 12-06-2019
Publisher: Springer Netherlands
Published in: Flow, Turbulence and Combustion / Issue 3/2019
Print ISSN: 1386-6184
Electronic ISSN: 1573-1987
DOI: https://doi.org/10.1007/s10494-019-00043-x

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