کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1282998 1497616 2010 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Experimental investigation of thermoacoustic coupling using blended hydrogen–methane fuels in a low swirl burner
موضوعات مرتبط
مهندسی و علوم پایه شیمی الکتروشیمی
پیش نمایش صفحه اول مقاله
Experimental investigation of thermoacoustic coupling using blended hydrogen–methane fuels in a low swirl burner
چکیده انگلیسی

In this study, experimental testing and analysis were performed to examine the combustion instability characteristics of hydrogen–methane blended fuels for a low-swirl lean premixed burner. The aim of this study is to determine the effect of hydrogen addition on combustion instability, and this is assessed by examining the flame response to a range of constant amplitude, single frequency chamber acoustic modes. Three different blends of hydrogen and methane (93% CH4–7% H2, 80% CH4–20% H2 and 70% CH4–30% H2 by volume) were employed as fuel at an equivalence ratio of 0.5, and with four different acoustic excitation frequencies (85, 125, 222 and 399 Hz). Planar laser induced fluorescence of the hydroxyl radical (OH-PLIF) was employed to measure the OH concentration at different phases of acoustic excitation and a Rayleigh Index was then calculated to determine the degree of thermoacoustic coupling. It was found, as has been previously reported, that the combustion characteristics are very sensitive to the fraction of hydrogen in the fuel mixture. The flame shows significant increases in flame base coupling and flame compaction with increasing hydrogen concentration for all conditions. While this effect enhances the flame response at non-resonant frequencies, it induces only minimal compaction and appears to decreases the coupling intensity at the resonant frequency.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Hydrogen Energy - Volume 35, Issue 1, January 2010, Pages 329–336
نویسندگان
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