先进燃烧室分级燃烧空气流量分配的探讨

参加燃烧的空气流量分配将大于60%的特点使常规燃烧室无法满足高温升和低污染燃烧室的基本要求.从燃烧的基本特性以及燃烧室的基本性能要求出发,重点分析了常规燃烧室中设计的燃烧空气分配的极限,讨论了高燃烧气量分配下燃烧室关键技术问题和软分级概念.通过比较现有燃烧室分级方式的特点,指出从稳定性角度出发RPP(rich premix prevaporized)中心分级是解决超高温升燃烧室的较佳方法,而LPP(lean premix prevaporized)中心分级是解决低污染燃烧室的较佳方法.

Discussion on combustion airflow distribution of advanced staged combustor

One of the significant characters in superhigh temperature-rise combustors and low emission combustors is represented by the high combustion airflow rate which is more than 60% in the airflow distribution.With this characteristic,the normal combustors could not achieve the basic requirements of the high temperature-rise combustors and low emission combustors.Based on the basic characteristics of combustion and the basic performance of the combustor,this paper emphatically analyzed the limit of the combustion airflow distribution on normal combustor design,and discussed the key points for the high combustion airflow rate combustor and the concept of the flexible staging.This paper compared the characteristics of different staging methods,pointed out that the rich premix prevaporized(RPP) center staged combustion is a preferred method for superhigh temperature-rise combustors,and the lean premix prevaporized(LPP)center staged combustion is a preferred method for low emission combustors.