کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
583070 877865 2008 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Calculation of the upper flammability limit of methane/air mixtures at elevated pressures and temperatures
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی بهداشت و امنیت شیمی
پیش نمایش صفحه اول مقاله
Calculation of the upper flammability limit of methane/air mixtures at elevated pressures and temperatures
چکیده انگلیسی
Four different numerical methods to calculate the upper flammability limit of methane/air mixtures at initial pressures up to 10 bar and initial temperatures up to 200 °C are evaluated by comparison with experimental data. Planar freely propagating flames are calculated with the inclusion of a radiation heat loss term in the energy conservation equation to numerically obtain flammability limits. Three different reaction mechanisms are used in these calculations. At atmospheric pressure, the results of these calculations are satisfactory. At elevated pressures, however, large discrepancies are found. The spherically expanding flame calculations only show a marginal improvement compared with the planar flame calculations. On the other hand, the application of a limiting burning velocity with a pressure dependence Su,lim ∼ p−1/2 is found to predict the pressure dependence of the upper flammability limit very well, whereas the application of a constant limiting flame temperature is found to slightly underestimate the temperature dependence of the upper flammability limit.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Hazardous Materials - Volume 153, Issue 3, 30 May 2008, Pages 1301-1307
نویسندگان
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