کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6679336 | 1427921 | 2015 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Experimental and modeling study of the effect of elevated pressure on lean high-hydrogen syngas flames
ترجمه فارسی عنوان
مطالعه تجربی و مدل سازی اثر فشار بالا بر شعله های آتش سوزی با مقدار زیاد هیدروژن
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کلمات کلیدی
همگاز، سرعت سوزش لامینار، روش شار حرارتی، فشار بالا،
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
چکیده انگلیسی
New laminar burning velocity measurements of 85:15% (by volume) H2-CO and H2-N2 mixtures with O2-He oxidizer are reported at lean conditions and elevated pressures (1-10Â atm). Experiments are conducted using the heat flux method at initial temperature of 298Â K. In this technique a near adiabatic flame is stabilized by balancing the heat loss from the flame to the burner with heat gain to the unburnt gas mixture such that no net heat loss to the burner is observed. A new facility was designed for such high pressure burner stabilized flame experiments. The results obtained are compared with five chemical kinetic schemes from literature for syngas mixtures at elevated pressures. Large differences are observed between the kinetic schemes and the experiments which can be attributed to certain key chemical reactions. A study of the kinetics is performed through reaction rate and sensitivity analysis which indicate that a high uncertainty still remains in important reactions that drive the production and consumption of species such as H, HO2 and OH. For lean mixtures the reaction HÂ +Â O2(+M)Â =Â HO2(+M) contributes significantly to the deviation of models from the experiments. The present analysis in the lean mixture regime suggests the need for further studies in assessment and modification of rate constants for this reaction.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Proceedings of the Combustion Institute - Volume 35, Issue 1, 2015, Pages 655-662
Journal: Proceedings of the Combustion Institute - Volume 35, Issue 1, 2015, Pages 655-662
نویسندگان
M. Goswami, J.G.H. van Griensven, R.J.M. Bastiaans, A.A. Konnov, L.P.H. de Goey,