Studying the benefits of liquid hydrocarbon combustion in a high-velocity jet of superheated steam when compared with other atomizers: CO2 and air

• Published in: Thermophysics and aeromechanics 2023-01, Vol.30 (1), p.109-119
• Main Authors: Sadkin, I. S., Kopyev, E. P., Shadrin, E. Yu, Mukhina, M. A.
• Format: Article
• Language: English
• Subjects: Atomizers; Atomizing; Carbon dioxide; Combustion efficiency; Combustion products; Diesel fuels; Exhaust gases; Flame temperature; Gas analysis; Hydrocarbon combustion; Hydrocarbons; Liquid fuels; Physics; Physics and Astronomy; Spraying; Temperature profiles; Thermocouples; Thermodynamics
• ISSN: 1531-8699; 0869-8643; 1531-8699
• DOI: 10.1134/S0869864323010122

Combustion of liquid hydrocarbons by spraying them with a jet of superheated steam, carbon dioxide and air has been experimentally studied. Results aimed at identifying the advantages of using superheated steam as a diluent atomizer over other diluent gases were obtained at the example of diesel fuel. For this, thermocouple measurement data were studied and compared, gas analysis of intermediate flame components was performed when fuel was sprayed with various diluent atomizers, and both combustion efficiency and harmful emissions in the final combustion products were compared. It was found that the air spray regime has a higher flame temperature (∼ 150 °C) in the entire measured range as compared to steam and carbon dioxide spray. At the same time, the regimes with steam and carbon dioxide have similar temperature profiles. Exhaust gas analysis showed that when sprayed with steam, the reduction in NO x reaches 25 and 70 % relative to carbon dioxide and air, respectively, which makes its use as a diluent atomizer more preferable when burning liquid fuels as compared to other studied gases.