TY - JOUR

T1 - Spatial Structure of a Reacting Turbulent Swirling Jet Flow with Combustion of a Propane–Air Mixture

AU - Sharaborin, D. K.

AU - Markovich, D. M.

AU - Dulin, V. M.

N1 - Publisher Copyright: © 2018, Pleiades Publishing, Ltd.

PY - 2018/5/1

Y1 - 2018/5/1

N2 - Results of an experimental study of the spatial structure of a reacting flow during combustion of a propane–air mixture in a turbulent swirling jet escaping into atmospheric air are presented. The fuel-to-air equivalence ratio is φ = 0.7, and the Reynolds number of the jet is Re = 5 · 103. The time-averaged spatial distributions of velocity, local density, and concentrations of the main species of the gas mixture are measured in low-swirl and high-swirl flows. In both cases, the flame front is stabilized in the internal mixing layer formed by the axial region of jet retardation, where hot combustion products are concentrated. In a high-swirl flow, the temperature distributions in the cross section y/d = 0.5 show that the region with the maximum temperature of the gas is located at the periphery of the central recirculation zone. Moreover, in the case of a high-swirl flow, there exists a recirculation zone at the axis, and the CO2 concentration is twice higher than in a low-swirl jet. The opposite situation is observed for O2.

AB - Results of an experimental study of the spatial structure of a reacting flow during combustion of a propane–air mixture in a turbulent swirling jet escaping into atmospheric air are presented. The fuel-to-air equivalence ratio is φ = 0.7, and the Reynolds number of the jet is Re = 5 · 103. The time-averaged spatial distributions of velocity, local density, and concentrations of the main species of the gas mixture are measured in low-swirl and high-swirl flows. In both cases, the flame front is stabilized in the internal mixing layer formed by the axial region of jet retardation, where hot combustion products are concentrated. In a high-swirl flow, the temperature distributions in the cross section y/d = 0.5 show that the region with the maximum temperature of the gas is located at the periphery of the central recirculation zone. Moreover, in the case of a high-swirl flow, there exists a recirculation zone at the axis, and the CO2 concentration is twice higher than in a low-swirl jet. The opposite situation is observed for O2.

KW - flame in a swirling flow

KW - particle image velocimetry

KW - spontaneous Raman scattering

KW - PARTICLE IMAGE VELOCIMETRY

KW - LASER

KW - BURNER

KW - TEMPERATURE-MEASUREMENTS

KW - FLAME

KW - DIAGNOSTICS

UR - http://www.scopus.com/inward/record.url?scp=85048055990&partnerID=8YFLogxK

U2 - 10.1134/S001050821803005X

DO - 10.1134/S001050821803005X

M3 - Article

AN - SCOPUS:85048055990

VL - 54

SP - 294

EP - 300

JO - Combustion, Explosion and Shock Waves

JF - Combustion, Explosion and Shock Waves

SN - 0010-5082

IS - 3

ER -