摘要： In 2002, Yang and Shy reported a global quenching (GQ) criterion of premixed CH 4 flames by turbulence characterized by a Karlovitz number (Ka) estimated at reactant temperature and an equivalence ratio (φ).This article re-analyzes such criteria based on a modified Ka estimated at mean temperature of reactants and products together with newly obtained GQ data at even higher Ka. This modified criterion is compared with a recently found ignition transition, which are then used to evaluate the boundary of thin and broken RZ regimes (Ka = 100) proposed by Peters ( 2000 ). It is found that flame GQ occurs beyond the broken RZ regime, where critical Ka ≥ 100 at 0.6 ≤φ < 1.3 forms a parabolic curve with the maximum Ka c ≈ 365 occurring possibly near φ = 1, except for very rich flames where Ka c = 28 at φ = 1.45. A simple model is proposed to explain these results. 出版者： Taylor & Francis Group 出版日期： 2012-10-01 出處： Combustion science and technology, 2012-10, Vol.184 (10-11), p.1916-1933 版權： Copyright Taylor & Francis Group, LLC 2012 識別號： ISSN: 0010-2202 識別號： EISSN: 1563-521X 識別號： DOI: 10.1080/00102202.2012.690658
