Measurements of droplets characteristics in a swirl-stabilized spray flame

Journal Article · Tue Nov 01 04:00:00 EST 2005 · Experimental Thermal and Fluid Science

DOI:https://doi.org/10.1016/j.expthermflusci.2005.05.002· OSTI ID:20677740

Hadef, R ^[1]; Lenze, B ^[2]

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1. Institut de Genie Mecanique, Universite Larbi Ben M'Hidi, BP 297, 04000 Oum El Bouaghi (Algeria)
2. Engler-Bunte-Institut, Chair of Combustion Technology, University of Karlsruhe (Germany)

Experiments have been performed in a kerosene airblast atomized spray flame where the fuel supply is sandwiched between two coswirling air streams. A phase-Doppler particle sizing system was used to measure fuel droplet size, velocity and turbulent kinetic energy of droplets and gas as well as the fuel volume flux within the combustor for two values of air preheat temperature, 200{sup o}C and 400{sup o}C. The results reveal that a small liquid fuel exists in the centre of the combustor and due to larger droplets with the swirl effect; the droplets characteristics (velocity and turbulent kinetic energy) did not follow the gas ones. Based upon these measurements, an optimum swirl number will exist with every atomization and burner arrangement of a liquid-fuelled flame associated and will be different from that associated with the corresponding gas-fuelled flame. The investigated atomizer shows a marked influence of the inlet air temperature on the measured droplet size which may be attributed to the design of the internal airflow, promoting prompt atomization at the dominant atomization mode.

• OSTI ID: 20677740
• Journal Information: Experimental Thermal and Fluid Science, Journal Name: Experimental Thermal and Fluid Science Journal Issue: 2 Vol. 30; ISSN 0894-1777; ISSN ETFSEO
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
AIR
ATOMIZATION
COMBUSTION
DROPLETS
KEROSENE
KINETIC ENERGY
SIZE
TEMPERATURE DEPENDENCE
TEMPERATURE RANGE 0400-1000 K
VELOCITY
VORTEX FLOW