کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
168799 457954 2014 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Uncertainties in interpretation of high pressure spherical flame propagation rates due to thermal radiation
ترجمه فارسی عنوان
عدم قطعیت در تفسیر انتشار شعله کروی با فشار بالا به علت تابش حرارتی
کلمات کلیدی
از دست دادن حرارت تابش، شعله ای که شعله ور می شود، سرعت شعله پیش مخلوط راه حل تحلیلی، عدم قطعیت، فشار بالا
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
چکیده انگلیسی

It has been suggested that radiation heat loss may be a large source of experimental uncertainty in flame speed measurements using the outwardly propagating spherical flame method. Thermal radiation is usually not considered in interpretation of these experiments, yet it may contribute significantly to uncertainty especially for model-constraining conditions at low flame temperature and high pressure. In the present work, a conservative analytical estimate of the effects of radiation heat loss is derived and validated against detailed numerical simulations. A solver with a graphical interface is provided in the Supplemental material to allow implementation of these analytical results. The analytical estimate considers the radiation induced burned gas motion as well as the decreasing flame temperature due to conduction to the radiating burned gas and radiation loss from the flame zone. The results show that previous measurements of hydrogen flame speeds at low flame temperature by Burke et al. (2010) [3] are minimally affected by radiation, but flames with low flame speeds can be strongly inhibited by radiative loss. Future laminar spherical flame measurements and interpretation of existing determinations with low adiabatic flame speeds must include consideration of radiation effects to avoid large uncertainties.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Combustion and Flame - Volume 161, Issue 1, January 2014, Pages 147–153
نویسندگان
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