CAJ | 학술논문

传统的钝体稳焰机制以高温烟气的回流预热初始燃料,促使着火提前,强化燃烧,达到稳定火焰的目的.这种钝体稳焰机制并未将回流区所具备的全部功能都发挥出来.本文提出的开缝钝体燃烧机制,即在钝体中心设置缝隙,向回流区送入少量燃料与空气,使其在最有利的环境中立即着火,形成一值班火焰,以明火点燃主流.这样,回流区的“被动热源”将转变成“主动热源”,从而大大增强了回流区对主流的稳焰效果.本文还对开缝钝体燃烧器的燃烧机制和实验结果进行了讨论.
전통적둔체은염궤제이고온연기적회류예열초시연료,촉사착화제전,강화연소,체도은정화염적목적.저충둔체은염궤제병미장회류구소구비적전부공능도발휘출래.본문제출적개봉둔체연소궤제,즉재둔체중심설치봉극,향회류구송입소량연료여공기,사기재최유리적배경중립즉착화,형성일치반화염,이명화점연주류.저양,회류구적“피동열원”장전변성“주동열원”,종이대대증강료회류구대주류적은염효과.본문환대개봉둔체연소기적연소궤제화실험결과진행료토론.
For the mechanism of the existing flame stabilization in combustion using bluff-body bumers.the initial flow of fuel was preheated by the recirculation of high temperature flue gas so as to introduce earlier ignition and enhance combustion,and thus the flame was stabilized.However,in that case some functions existing in the recirculation region were not yet exerted.A new mechanism of combustion using slitted bluff-body bumers is proposed in this study.The main idea is to cut a slit at the center of the bluff-body and deliver small amount of fuel and air to the recirculation region so as to ignite it in the most favorable environment to form a pilot flame.which in turn ignites the main stream by naked flame.As a result,the passive heat source of the recirculation region is changed into the active heat source,and the effect of flame stabilization on the main stream region exerted by the recirculation region is greatly increased.In this paper,the mechanism of combustion using slitted bluff-body bumers and the related experimental results are discussed.