Effects of heat release in laminar diffusion flames lifted on round jets

Lifted Diffusion Flame Stabilisation: Conditional Analysis of Multi-Parameter High-Repetition Rate Diagnostics at the Flame Base

“…It also seems that the approach of the flame is altering the flow structure and gradients ahead of its appearance in the imaging plane, corresponding to analytical predictions from Boulanger et al [3] on the effects of heat release. It is of course possible that the increase in out-of-plane fluid velocity is correlated, but not causal, if the out-of-plane motion of the flame front were controlled by flame propagation.…”

“…They propose a stabilisation mechanism based on near-laminar upstream propagation of an edge-flame into locally low-speed, lowturbulence fluid caused by the flame itself. Such regions may create streamline divergence in the incoming reactants, as discussed in Boulanger et al [3].…”

DNS analysis of partially premixed combustion in spray and gaseous turbulent flame-bases stabilized in hot air

“…The stoichiometric mixture fraction for n-heptane combustion in air is of the order of Z s = 0.0625. This strategy for tabulating chemistry was previously used in the context of hydrogen-sulfur oxy-flame analysis [28] and laminar gaseous hydrocarbon-lifted flames studies [29]. The details of a chemical mechanism act at various levels in the flame structure and simulations incorporating more realistic chemical kinetics, using simplified or tabulated chemistry [30], would be preferable.…”

A Study on The Flame Propagation Velocity of Laminar Lifted Flame with Flame Curvatur e and Scalar Dissipation Rate

“…Dold[3]는 삼지화염 전파 속도가 혼합분율 구배 에 의존하며, 최대 단열 층류화염 속도에 의해 구속 됨을 보였다. 삼지화염의 열방출효과에 대하여 Boulanger [4]가 연구하였고, Plessing[5]등은 실험 및 수치적으로희석된연료분사와주위연료의동축류 (co-flow) 분사에 따른 선대칭 동축류 버너에서 삼지 화염의 전파 및 구조에 대하여 연구하였고, Im과 Chen [6,7]은 부분 예혼합 수소/공기 혼합물 내에서 의 삼지화염을 연구하였으며, 수치 모사로 삼지화 염전파유동변형(flowstrain)효과와상세한 화학적 성질을 연구하였다. Lockett [8]등은 실험적으로 층 류 대향류(counterflow)에 따른 삼지화염의 안정성 및 구조를 조사하였고, Frouzakis[9]에 의해 대향제 트(opposedjet)에의해생성된삼지화염의전파가연 구되었으며,Ko와Chung [10,11]및Lee [12]는실험적 으로 층류 비예혼합 분사내 삼지화염의 전파 및 부 상높이를 연구하였다.…”