کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7705685 1497298 2018 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Experimental study on self-acceleration in expanding spherical hydrogen-air flames
ترجمه فارسی عنوان
مطالعه تجربی بر روی خود شتاب در گسترش شعله های کروی هیدروژن هوا
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه شیمی الکتروشیمی
چکیده انگلیسی
The development of cellularity for expanding spherical hydrogen-air flames at elevated pressure, owing to hydrodynamic and diffusional-thermal instabilities was experimentally investigated using high-speed schlieren images. The critical flame radii and critical Peclet numbers at which cracks begin to propagate and for the onset of flame acceleration were obtained. The dependency of Pecl on Ma for hydrogen-air flames was compared with that for other fuels. The results showed that cellular development depends on the intensity of the diffusional-thermal instability. The acceleration exponent and fractal excess for the acceleration regime of a hydrogen-air flame were evaluated. The values show that the transition regime and self-similar regime exist in the acceleration regime of expanding spherical hydrogen-air flames.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Hydrogen Energy - Volume 43, Issue 27, 5 July 2018, Pages 12556-12564
نویسندگان
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