کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7717984 | 1497474 | 2014 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Ignition of hydrogen jet fires from high pressure storage
ترجمه فارسی عنوان
جرقه جت هیدروژن از ذخیره سازی با فشار بالا آتش می زند
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کلمات کلیدی
هیدروژن، آتش جت، انفجار، سوزش خود بخود،
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
چکیده انگلیسی
Self-ignition behaviour of highly transient jets from hydrogen high pressure tanks were investigated up to 26Â MPa. The jet development and related ignition/combustion phenomena were characterized by high speed video techniques and time resolved spectroscopy. Video cross correlation method BOS, brightness subtraction and 1-dimensional image contraction were used for data evaluation. Results gained provided information on ignition region, flame head jet velocity, flame contours, pressure wave propagation, reacting species and temperatures. On burst of the rupture disc, the combustion of the jet starts close to the nozzle at the boundary layer to the surrounding air. Combustion velocity decelerated in correlation to an approximated drag force of constant value which was obtained by analysing the head velocity. The burning at the outer jet layer develops to an explosion converting to a nearly spherical volume at the jet head; the movement of the centroid is nearly unchanged and follows the jet front in parallel. The progress of the nearly spherical explosion could be evaluated by assuming an averaged flame ball radius. An apparent flame velocity could be derived to be about 20Â m/s. It seems to increase slightly on the pressure in the tank or the related initial jet momentum. Self-initiation is nearly always achieved especially induced the interaction of shock waves and their reflections from the orifice. The combustion process is composed of shell combustion of the jet cone at the bases with a superimposed explosion of the decelerating jet head volume.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Hydrogen Energy - Volume 39, Issue 35, 3 December 2014, Pages 20554-20559
Journal: International Journal of Hydrogen Energy - Volume 39, Issue 35, 3 December 2014, Pages 20554-20559
نویسندگان
A. Kessler, A. Schreiber, C. Wassmer, L. Deimling, S. Knapp, V. Weiser, K. Sachsenheimer, G. Langer, N. Eisenreich,