An implicit relation between temperature and reaction rate in the SLFM

作     者：Jian Zhang,~(a)) Guowei He,~(b)) and Guodong Jin LNM,Institute of Mechanics,Chinese Academy of Sciences,Beijing 100190,China 

作者机构：LNM Institute of Mechanics Chinese Academy of Sciences Beijing 100190 China 

出 版 物：《Theoretical & Applied Mechanics Letters》 (力学快报（英文版）)

年 卷 期：2011年第1卷第1期

页      面：47-49页

学科分类：080702[工学-热能工程] 08[工学] 0807[工学-动力工程及工程热物理] 

基　　金：supported by CAS(KJCX2-SW-L08), 973 Program of China(2007CB814800,2009CB724100) NSFC(11072247,10702074,10732090,50906096) the LNM initial funding for young investigators 

主　　题：nonpremixed turbulent combustion local extinction and reignition steady laminar flamelet model unstable branch 

摘      要：The Arrhenius law implies that reaction rate is a continuous function of temperature. However,the steady laminar flamelet model(SLFM) does not explicitly give this functional relationship. The present study addresses this relation in the *** is found that reaction rate is not continuous in the mixture-fraction *** a result,the SLFM is unable to predict local extinction and ***,we use the unstable branch of the S-curve to fill the gap between steady burning branch and extinction one,and find that this modification leads to a continuous dependent of reaction rate on *** the modified SLFM can describe the local extinction and reignition.