基于EDC模型的氧煤燃烧旋流燃烧器的数值模拟(英文)

作     者：崔凯 刘冰 吴玉新 杨海瑞 吕俊复 张海 CUI Kai;LIU Bing;WU Yuxin;YANG Hairui;Lü Junfu;ZHANG Hai

作者机构：Key Laboratory for Thermal Science and Power Engineering of Ministry EducationDepartment of Thermal EngineeringTsinghua University 

基　　金：Supported by the Chinese Ministry of Science and Technology Project(2011DFA60390) The National High Technology Research and Development Program of China(2007AA05Z303) 

出 版 物：《Chinese Journal of Chemical Engineering》 (中国化学工程学报（英文版）)

年 卷 期：2014年第22卷第2期

页      码：193-201页

摘      要：The characteristics of oxy-coal combustion for a swirl burner with a specially designed preheating chamber are studied *** order to increase the accuracy in the prediction of flame temperature and ignition position,eddy dissipation concept(EDC)model with a skeletal chemical reaction mechanism was adopted to describe the combustion of volatile *** was conducted under six oxidant stream conditions with different O2/N2/CO2molar ratios:21/79/0,30/70/0,50/50/0,21/0/79,30/0/70 and 50/0/*** showed that O2enrichment in the primary oxidant stream is in favor of combustion stabilization,acceleration of ignition and increase of maximum flame temperature,while the full substitution of N2by CO2in the oxidant stream delays ignition and decreases the maximum flame ***,the overall flow field and flame shapes in these cases are very similar at the same flow rate of the primary oxidant *** characteristics of the air-coal is similar to that of the oxy-coal with 30%O2and 70%CO2in the oxidant stream,indicating that the rear condition is suitable for retrofitting an air-coal fired boiler to an oxy-coal *** swirl burner with a specially designed preheating chamber can increase flame temperature,accelerate ignition and enhance burning intensity of pulverized coal under oxy-coal ***,qualitative experimental validation indicated the burner can reduce the overall NOx emission under certain O2enrichment and oxy-coal combustion conditions against the air-coal combustion.

主 题 词：旋流燃烧器 氧化剂 数值模拟 DC模型 煤燃烧 火焰温度 特殊设计 燃烧器具 

学科分类：0710[理学-生物科学类] 0830[工学-生物工程类] 080702[080702] 0817[工学-轻工类] 08[工学] 0807[工学-电子信息类] 0703[理学-化学类] 

核心收录：

D　O　I：10.1016/S1004-9541(14)60032-X

馆 藏 号：203581458...