کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
8108497 1522242 2018 13 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Non-premixed flame characteristics and exhaust gas concentrations behind rifled bluff-body cones
ترجمه فارسی عنوان
ویژگی های شعله های غیر پیش مخلوط و غلظت گازهای خروجی پس از مخروط های بدن رانده شده
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی مهندسی انرژی و فناوری های برق
چکیده انگلیسی
Four bluff-body cones with/without rifled v-grooves were installed behind a non-premixed traditional combustion nozzle to intensify the bluff-body effects and swirl flow. The spiral rifles transformed axial momentum (or axial velocity) into tangential momentum (or tangential velocity). The interaction between the fuel tangential component and axial air flow increased turbulence intensity (T.I.). The Schlieren photography was utilized to visualize the flame structures and classify three flame patterns-jet flame, recirculation flame, and turbulence flame. The jet flame occurs when fuel-jet velocity is high and air-jet velocity (ua) is low. However, the turbulence flame exists at the high air-jet velocity. The flame lengths were measured using the direct photography scheme. The flame length at high ua is significantly shorter than that at low ua. Furthermore, the increase of rifle number (i.e., increasing T.I.) induces the high maximum temperature and low nitric-oxide concentration.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of the Energy Institute - Volume 91, Issue 4, August 2018, Pages 489-501
نویسندگان
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