کد مقاله کد نشریه سال انتشار مقاله انگلیسی ترجمه فارسی نسخه تمام متن
167071 457836 2008 11 صفحه PDF سفارش دهید دانلود رایگان
عنوان انگلیسی مقاله ISI
Measurement of OH density and gas temperature in incipient spark-ignited hydrogen–air flame
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موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Measurement of OH density and gas temperature in incipient spark-ignited hydrogen–air flame
چکیده انگلیسی

To investigate the electrostatic ignition of hydrogen–air mixtures, the density of OH radicals and the gas temperature are measured in an incipient spark-ignited hydrogen–air flame using laser-induced predissociation fluorescence (LIPF). The assessment of the electrostatic hazard of hydrogen is necessary for developing hydrogen-based energy systems in which hydrogen is used in fuel cells. The spark discharge occurs across a 2-mm gap with pulse duration approximately 10 ns. First, a hydrogen (50%)–air mixture is ignited by spark discharge with E=1.35EminE=1.35Emin, where E   is the spark energy and EminEmin is the minimum ignition energy. In this mixture, OH density decreases after spark discharge. It is 3×1016 cm−33×1016 cm−3 at t=0 μst=0 μs and 4×1015 cm−34×1015 cm−3 at t=100 μst=100 μs, where t   is the postdischarge time. On the other hand, the gas temperature increases after spark discharge. It is 900 K at t=30 μst=30 μs and 1400 K at t=200 μst=200 μs. Next, a stoichiometric (hydrogen (30%)–air) mixture is ignited by spark discharge with E=1.25EminE=1.25Emin. In this mixture, OH density is approximately constant at 4×1016 cm−34×1016 cm−3 for 150 μs after spark discharge, and the gas temperature increases from 1000 K (t=0 μst=0 μs) to 1800 K (t=150 μst=150 μs).

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Combustion and Flame - Volume 152, Issues 1–2, January 2008, Pages 69–79
نویسندگان
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