کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5146959 | 1497357 | 2017 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effect of the cavity depth on the combustion efficiency of lean H2/air flames in a micro combustor with dual cavities
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Effect of the cavity depth on the combustion efficiency of lean H2/air flames in a micro combustor with dual cavities Effect of the cavity depth on the combustion efficiency of lean H2/air flames in a micro combustor with dual cavities](/preview/png/5146959.png)
چکیده انگلیسی
The impact of the cavity depth on the combustion efficiency of lean hydrogen/air flames in a micro-combustor with dual cavities was numerically investigated. The results show that under lower and higher inlet velocities, the combustion efficiency varies in opposite tendencies with an increasing cavity depth. Namely, under lower inlet velocity, the combustion efficiency decreases as the cavity depth is increased, while it increases with an increasing cavity depth under higher inlet velocity. To reveal the underlying mechanisms responsible for these variation tendencies, we performed comprehensive analysis in terms of heat transfer from the flame to cavity walls, heat regeneration ratio via upstream wall, residence time in the cavity, and stretch rate at the flame tip. It can be summarized that the total heat flux at the cavity walls and the heat regeneration ratio via upstream wall are the two dominant factors under lower inlet velocity, while the stretch rate at the flame tip and the residence time in the cavity overwhelm the other two factors under higher inlet velocity.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Hydrogen Energy - Volume 42, Issue 20, 18 May 2017, Pages 14312-14320
Journal: International Journal of Hydrogen Energy - Volume 42, Issue 20, 18 May 2017, Pages 14312-14320
نویسندگان
Wei Yang, Ying Xiang, Aiwu Fan, Hong Yao,