两种喷管中心间距下微阵列火焰场燃烧特性数值研究  

Combustion Characteristics of Array Combustor for Methane Premixed Microflame under Two Nozzle Center Distance Conditions

作　　者：曾小军[1,2,3] 汪小憨[1,2,3] 赵黛青[1,2,3] 蒋利桥[1,2,3] 杨卫斌[1,2,3] 

机构地区：[1]中国科学院广州能源研究所,广州510640 [2]中国科学院可再生能源重点实验室,广州510640 [3]广东省新能源和可再生能源研究开发与应用重点实验室,广州510640

出　　处：《新能源进展》2016年第3期201-205,共5页Advances in New and Renewable Energy

基　　金：国家自然科学基金面上项目(51176193);国家重点基础研究发展计划(2014CB239600)

摘　　要：构建了处于无限阵列中管径为1.5 mm的3×3喷管微阵列火焰模型,采用甲烷简化机理,分别对喷管中心间距为2 mm和4 mm的微阵列火焰场燃烧特性进行数值研究。结果表明,在相同输入工况下,随着管中心间距的减小,喷管火焰间的相互影响增强,燃烧反应区域变长,最高温度增大;同时,计算区域出口CO排放增加、燃烧效率下降。喷管中心间距2 mm和4 mm两种工况下,距离管口5 mm后的区域温度都开始均匀分布,为研究温度均匀的微阵列火焰加热器提供了设计依据。A numerical model of 3 × 3 array combustor consisting ofФ1.5 mm tubes for methane premixed microflame was established to learn the effects of nozzle center distance on the combustion characteristics by using the reduced mechanism for methane. The results show that the effect among micro flames is enhanced by decreasing the nozzle center distance, resulting in a lengthening region of combustion reaction and an increase of the highest combustion temperature as well as an increase in CO emissions and decrease in combustion efficiency at the outlet of calculating region. Temperature uniformity in the heating field was obtained after 5 mm from the nozzles under different nozzle center distances of 2 mm and 4 mm, which provides a design basis for the micro array combustion heater.

关 键 词：微小火焰 阵列火焰 温度均匀性 火焰加热 甲烷 

分 类 号：TK16[动力工程及工程热物理—热能工程]