کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
8961675 1646504 2018 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Flame downwash transition and its maximum length with increasing fuel supply of non-premixed jet in cross flow
ترجمه فارسی عنوان
انتقال جریان کمپرسور شعله و حداکثر طول آن با افزایش عرضه سوخت جت بدون جت در جریان متقاطع
کلمات کلیدی
آتش سوزی شعله جت بدون مخلوط، جریان صلیبی، حداکثر طول شعله پایین، نسبت شار جت به عبور جریان،
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی انرژی (عمومی)
چکیده انگلیسی
The present study experimentally investigated the flame downwash transition and its maximum length that can be reached at leeward side of nozzle with increasing fuel supply of non-premixed jet in cross flows. Experiments were conducted with 8, 10, 13 and 15 mm nozzles, using propane and methane as fuel. The cross flow speed ranges from 0.70 to 3.08 m/s while the fuel jet velocity ranges between 0.04 and 4.26 m/s. Results showed that, with increasing fuel supply at a given cross flow speed, flame downwash length first increased (fuel supply controlled regime) then decreased (leeward side reversing flow rotating strength controlled regime). A function between the jet-to-crossflow momentum flux ratio (Rc) and dimensionless fuel mass flow rate (m˙c∗) was proposed to illuminate the tuning state of above transition. The flame downwash maximum length at the turning state normalized by nozzle diameter was found to have a linear relation with Froude number of fuel jet (Frj=uj/gD) or cross flow (Fra=ua2/gD). These findings contribute to a better understanding of flame downwash evolution process, which could have a basic significance for reducing fuel emission, improving combustion energy efficiency and saving energy by controlling the flame downwash scale.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Energy - Volume 164, 1 December 2018, Pages 298-305
نویسندگان
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