摘要
在主燃区过量空气系数α=0.9,针对不同的二次风摆角和停运不同的一次风,利用PDA测试系统对冷态模化的炉膛再燃区域气固两相流场的速度和粒子粒径进行了6种工况的测量,研究了不同工况下再燃喷口射流在炉膛中的穿透性能。试验表明增大二次风的摆角使得再燃射流在炉膛中的穿透性能明显减弱,停用不同一次风对再燃风的射流的影响相对较小,速度衰减规律与之相反。各工况在xy、zx平面气流混和特性基本一致,气流法向yz平面气流混和特性差异较大。
With the stoichiometric-ratio α=0.9 in main combustion zone （MCZ）, different secondary air bias and shutting down different burners, gas-particle velocity and particle size in reburning zone （RZ） of a cold modeling furnace were measured using a Particle Dynamic Analyzer（PDA） system. 6 experiments were conducted to investigate the penetrability of the burning jet in the furnace for the micronized coal reburning technology demonstration. The experiments indicate that the penetrability will attenuate with the bias angle of the secondary air increasing; the influence of shutting down different burners in MCZ is relatively small; and the velocity attenuation of the reburing jet is inversed. The gas flow mixing characteristics in xy and zx plane are basically identically, but in the normal plane of the main flow-yz plane, mixing characteristics are different.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2006年第9期26-30,共5页
Proceedings of the CSEE
基金
国家自然科学基金项目(50476030)
国家863高技术基金项目(2002AA527051)~~
关键词
热能动力工程
粒子动态分析
射流穿透性能
气固两相流
再燃
混合特性
thermal power engineering
PDA
jetpenetrability
gas-particle two-phase flow
reburning
mixingcharacteristics
