Combined non-luminous flame radiation and surface tension effects during methanol droplet combustion

Vasudevan Raghavan, Daniel N. Pope, George Gogos

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The effect of non-luminous thermal radiation on suspended (constant relative velocity) methanol droplet combustion in a low temperature (300 K) and low pressure (1 atm) environment is discussed in detail. Numerical results are obtained using a predictive, transient, two-phase, axisymmetric numerical model that includes surface tension effects. Radiation is modeled using the optically thin approximation with the product species CO2 and H2O as the radiating species. Results for combustion in a quiescent atmosphere (initial Reynolds number 0.01) and initial droplet diameters in the range of 0.43 mm to 3 mm are presented. The results show that the effect of flame radiation is negligible when the initial droplet diameter is less than approximately 1 mm and becomes increasingly important for droplets with initial diameters greater than approximately 1 mm, as reported in previous literature. The average evaporation constant decreases with the initial droplet diameter. Both radiation and surface tension have a significant effect on the predicted extinction diameters of initially larger droplets. The extinction diameter presents a non-linear variation with the initial droplet diameter for initially larger droplets and agreement with experiments is good.

Original languageEnglish (US)
Title of host publicationProceedings of the ASME International Mechanical Engineering Congress and Exposition, IMECE 2007
Pages827-836
Number of pages10
DOIs
StatePublished - May 29 2008
EventASME International Mechanical Engineering Congress and Exposition, IMECE 2007 - Seattle, WA, United States
Duration: Nov 11 2007Nov 15 2007

Publication series

NameASME International Mechanical Engineering Congress and Exposition, Proceedings
Volume6

Conference

ConferenceASME International Mechanical Engineering Congress and Exposition, IMECE 2007
CountryUnited States
CitySeattle, WA
Period11/11/0711/15/07

Fingerprint

Surface tension
Methanol
Radiation
Heat radiation
Numerical models
Evaporation
Reynolds number
Experiments

ASJC Scopus subject areas

  • Engineering(all)

Cite this

Raghavan, V., Pope, D. N., & Gogos, G. (2008). Combined non-luminous flame radiation and surface tension effects during methanol droplet combustion. In Proceedings of the ASME International Mechanical Engineering Congress and Exposition, IMECE 2007 (pp. 827-836). (ASME International Mechanical Engineering Congress and Exposition, Proceedings; Vol. 6). https://doi.org/10.1115/IMECE2007-43425

Combined non-luminous flame radiation and surface tension effects during methanol droplet combustion. / Raghavan, Vasudevan; Pope, Daniel N.; Gogos, George.

Proceedings of the ASME International Mechanical Engineering Congress and Exposition, IMECE 2007. 2008. p. 827-836 (ASME International Mechanical Engineering Congress and Exposition, Proceedings; Vol. 6).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Raghavan, V, Pope, DN & Gogos, G 2008, Combined non-luminous flame radiation and surface tension effects during methanol droplet combustion. in Proceedings of the ASME International Mechanical Engineering Congress and Exposition, IMECE 2007. ASME International Mechanical Engineering Congress and Exposition, Proceedings, vol. 6, pp. 827-836, ASME International Mechanical Engineering Congress and Exposition, IMECE 2007, Seattle, WA, United States, 11/11/07. https://doi.org/10.1115/IMECE2007-43425
Raghavan V, Pope DN, Gogos G. Combined non-luminous flame radiation and surface tension effects during methanol droplet combustion. In Proceedings of the ASME International Mechanical Engineering Congress and Exposition, IMECE 2007. 2008. p. 827-836. (ASME International Mechanical Engineering Congress and Exposition, Proceedings). https://doi.org/10.1115/IMECE2007-43425
Raghavan, Vasudevan ; Pope, Daniel N. ; Gogos, George. / Combined non-luminous flame radiation and surface tension effects during methanol droplet combustion. Proceedings of the ASME International Mechanical Engineering Congress and Exposition, IMECE 2007. 2008. pp. 827-836 (ASME International Mechanical Engineering Congress and Exposition, Proceedings).
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