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Title: Studies on the Radiation Fraction of Propane Jet Diffusion Flames under Crossflow // Proceedings of the Ninth International Seminar on Fire and Explosion Hazards. Vol. 1: 21-26 April 2019, Saint Petersburg, Russia
Creators: Wang J. W.; Fang J.; Zhao L. Y.; Lin S. B.; Guan J. F.; Shah H. R.; Zhang Y. M.; Sun J. H.
Organization: University of Science and Technology of China; Tsinghua University
Imprint: Saint Petersburg, 2019
Collection: Общая коллекция
Document type: Article, report
File type: PDF
Language: English
DOI: 10.18720/SPBPU/2/k19-84
Rights: Свободный доступ из сети Интернет (чтение, печать, копирование)

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Many industrial combustion devices rely on jet flame combustion in crossflow to achieve mixing and reaction. Studies relating to the determination of the radiation fraction of turbulent jet flames are very important. Previous research affords limited predictive capability regarding the coupling effects of crossflow and jet flow. In this work, a new theoretical prediction equation of radiation fraction is given for its dependence on the fuel mass flow rate and the crossflow velocity. Experiments of turbulent propane jet diffusion flames with 8, 10, 12, and 14 mm exit diameters in 1.0, 1.5 and 2.0 m/s cross-winds were carried out in a wind tunnel. The jet Reynolds numbers varied from 1082 to 4711 and the jet-tocrossflow momentum flux ratio ranged from 0.1 to 10. The radiation fraction is almost independent of the nozzle diameter under low crossflow velocity, and the crossflow has the largest effects on the radiation fraction for smaller nozzle diameters. These occurred mainly because of the effects of crossflow and jet flow velocities on the soot residence time that is proportional to the radiation fraction.

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