Investigation on Combustion Characteristics and NO Formation of Methane with Swirling and Non-Swirling High Temperature Air  

作　　者：LI Xing JIA Li 

机构地区：[1]Institute of Thermal Engineering,School of Mechanical,Electronic and Control Engineering,Beijing Jiaotong University

出　　处：《Journal of Thermal Science》2014年第5期472-479,共8页热科学学报（英文版）

基　　金：support by "863" plan(No.2006AA05 Z228)

摘　　要：Combustion characteristics of methane jet flames in an industrial burner working in high temperature combustion regime were investigated experimentally and numerically to clarify the effects of swirling high temperature air on combustion.Speziale-Sarkar-Gatski(SSG) Reynolds stress model,Eddy-Dissipation Model(EDM),Discrete Ordinates Method(DTM) combined with Weighted-Sum-of-Grey Gases Model(WSGG) were employed for the numerical simulation.Both Thermal-NO and Prompt-NO mechanism were considered to evaluate the NO formation.Temperature distribution,NO emissions by experiment and computation in swirling and non-swirling patterns show combustion characteristics of methane jet flames are totally different.Non-swirling high temperature air made high NO formation while significant NO prohibition were achieved by swirling high temperature air.Furthermore,velocity fields,dimensionless major species mole fraction distributions and Thermal-NO molar reaction rate profiles by computation interpret an inner exhaust gas recirculation formed in the combustion zone in swirling case.

关 键 词：swirling non-swirling high temperature air combustion methane NO experiment numerical simulation 

分 类 号：TK16[动力工程及工程热物理—热能工程]