대향류 슬롯 버너에서 이중 예혼합 선단화염의 전파특성
Edge Flame propagation for Twin Premixed Counterflow Slot Burner
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Propagation rates (Uedge) of various premixed, twin edge-flames were measured as a function of global strain rate (σ), mixture strength, and Lewis number (Le). Using a counterflow slot-jet burner with electrical heaters at each end, both advancing (positive Uedge) and retreating (negative Uedge) edge-flames can be studied as they propagate along the long dimension of the burner. Experimental results are presented for premixed methane/air twin flames in terms of the effects of σ on Uedge. Both low-σ and high-σ extinction limits were discovered for all mixtures tested. As a result, the domain of edge-flame stability was obtained in terms of heat loss factor and normalized flame thickness, and comparison with the numerical result of other researchers was also made. For low (CH4/O2/CO2) and high (C3H8/air) Lewis number cases, propagation rates clearly show a strong dependence on Le.
Abstract
Propagation rates (Uedge) of various premixed, twin edge-flames were measured as a function of global strain rate (σ), mixture strength, and Lewis number (Le). Using a counterflow slot-jet burner with electrical heaters at each end, both advancing (positive Uedge) and retreating (negative Uedge) edge-flames can be studied as they propagate along the long dimension of the burner. Experimental results are presented for premixed methane/air twin flames in terms of the effects of σ on Uedge. Both low-σ and high-σ extinction limits were discovered for all mixtures tested. As a result, the domain of edge-flame stability was obtained in terms of heat loss factor and normalized flame thickness, and comparison with the numerical result of other researchers was also made. For low (CH4/O2/CO2) and high (C3H8/air) Lewis number cases, propagation rates clearly show a strong dependence on Le.
참고문헌 (11)
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