کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
240662 | 1427924 | 2011 | 8 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Complex chemistry simulations of spark ignition in turbulent sprays Complex chemistry simulations of spark ignition in turbulent sprays](/preview/png/240662.png)
Three-dimensional DNS of two-phase flows with the point-source approximation and with complex chemistry for n-heptane has been used to extract physical information on the structure of igniting kernels following localised heat deposition in turbulent monodisperse sprays. Consistent with experiment, small sparks fail to ignite and sprays ignite later than premixed gaseous mixtures. Reaction rates are intense in spherical zones near droplets and much lower in the interdroplet spacing, resulting in a highly wrinkled flame surface. The propagation of these reaction zones was observed. The flame shows a locally non-premixed character, with reactions proceeding at a wide range of mixture fractions, which increases as evaporation progresses. The distribution of various chemical species is presented. The results constitute a database for model validation and physical analysis.
Journal: Proceedings of the Combustion Institute - Volume 33, Issue 2, 2011, Pages 2135–2142