کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5429409 1397350 2011 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The importance of thermal radiation transfer in laminar diffusion flames at normal and microgravity
موضوعات مرتبط
مهندسی و علوم پایه شیمی طیف سنجی
پیش نمایش صفحه اول مقاله
The importance of thermal radiation transfer in laminar diffusion flames at normal and microgravity
چکیده انگلیسی

The importance of radiation heat loss in laminar and turbulent diffusion flames at normal gravity has been relatively well recognized in recent years. There is currently lack of quantitative understanding on the importance of radiation heat loss in relatively small scale laminar diffusion flames at microgravity. The effects of radiation heat transfer and radiation absorption on the structure and soot formation characteristics of a coflow laminar ethylene/air diffusion flame at normal- and microgravity were numerically investigated. Numerical calculations were conducted using GRI-Mech 3.0 combustion chemistry without the NOx mechanism and complex thermal and transport properties, an acetylene based soot formation model, and a statistical narrow-band correlated-k non-grey gas radiation model. Radiation heat transfer and radiation absorption in the microgravity flame were found to be much more important than their counterparts at normal gravity. It is important to calculate thermal radiation transfer accurately in diffusion flame modelling under microgravity conditions.

Research highlights► Radiation heat transfer greatly lowers the flame temperatures in the centerline region. ► Radiation heat transfer is much more significant in microgravity flames. ► Radiation heat transfer is responsible for soot emission at microgravity. ► It is necessary to calculate radiation heat transfer accurately in microgravity flames.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Quantitative Spectroscopy and Radiative Transfer - Volume 112, Issue 7, May 2011, Pages 1241-1249
نویسندگان
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