Extinction theory of spray premixed flames

Shuhn Shyurng Hou, Ta Hui Lin

Research output: Contribution to conferencePaperpeer-review

3 Citations (Scopus)

Abstract

Recent advances in the understandings on extinction of spray premixed flames under the influence of internal heat transfer, external heat transfer, flow stretch and preferential diffusion by using activation energy asymptotics are reviewed and discussed. In the theoretical model, a completely prevaporized mode and a partially prevaporized mode of flame propagation are identified. The internal heat transfer, which results from droplet gasification and varies with the liquid loading and the initial droplet size of the spray, provides internal heat loss for inert sprays and rich fuel sprays, but internal heat gain for lean fuel sprays. Extinction of homogeneous flames by heat loss and stretch is firstly reviewed. Thereafter, the theory of laminar flame propagation in one-dimensional dilute sprays is introduced to further examine flame extinction by internal and external heat transfers. Finally, extinction of spray premixed flames by flow stretch modelled in a stagnation-point flow for positive stretch and in a Bunsen flame tip for negative stretch,are respectively presented with considering the coupled effects of preferential diffusion, flame stretch and inert (water) or fuel sprays.

Original languageEnglish
Pages13-24
Number of pages12
Publication statusPublished - 2005 Dec 1
Event5th Asia-Pacific Conference on Combustion, ASPACC 2005 - Adelaide, SA, Australia
Duration: 2005 Jul 172005 Jul 20

Other

Other5th Asia-Pacific Conference on Combustion, ASPACC 2005
Country/TerritoryAustralia
CityAdelaide, SA
Period05-07-1705-07-20

All Science Journal Classification (ASJC) codes

  • Fluid Flow and Transfer Processes

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