کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
240695 1427924 2011 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Inclined fire whirls
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Inclined fire whirls
چکیده انگلیسی

Air entrainment, leading to strong fire whirls, is commonly thought to be caused by the buoyant rise of the hot combustion products under the influence of gravity. We have, however, created in the laboratory steady, axisymmetric strong fire whirls with axes inclined 30° from the vertical orientation, whirls which model an inclined fire whirl, about 30 m tall, observed in California wildland near the Cleveland National Forest. The results contradict the common notion of buoyancy being significant for the structure of the whirl, implying that strong fire whirls instead are dominated by rotation only, even if their axis is vertical. The new concept of rotation-controlled fire whirls is explained by a Rossby number displacing the Froude number (or the Richardson number) in describing the phenomenon.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Proceedings of the Combustion Institute - Volume 33, Issue 2, 2011, Pages 2417–2424
نویسندگان
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