کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10264440 | 457886 | 2005 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effect of Lewis number on flame propagation through vortical flows
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Effect of Lewis number on flame propagation through vortical flows Effect of Lewis number on flame propagation through vortical flows](/preview/png/10264440.png)
چکیده انگلیسی
The premixed gas flame spreading through an array of large-scale vortices is studied numerically. It is found that the flame speed is a nonmonotonic function of the stirring intensity. At sufficiently low Lewis numbers (Le<1) the system becomes bistable with a hysteretic transition between possible propagation modes. In the presence of volumetric heat losses the stirring invariably promotes extinction (reduces the flammability limits), provided Le>1. At Le<1 this holds only for sufficiently strong stirring, whereas moderate stirring actually expands the flammability limits. At Le>1 the deficient reactant is fully consumed up to the very quenching point. At Le<1, prior to the total extinction, part of the deficient reactant escapes the reaction zone and remains unconsumed.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Combustion and Flame - Volume 142, Issue 3, August 2005, Pages 235-240
Journal: Combustion and Flame - Volume 142, Issue 3, August 2005, Pages 235-240
نویسندگان
L. Kagan, G. Sivashinsky,