中国电机工程学报2016，Vol.36Issue(22)：6156-6163,8.DOI:10.13334/j.0258-8013.pcsee.151543
值班燃料比对环形燃烧室内NOx生成影响的数值研究
Numerical Simulation of Pilot Fuel Percentage on NOx Formation in an Annular Combustion Chamber
摘要
Abstract
The computational fluid dynamics (CFD) method was employed to simulate the impact of pilot fuel percentage on NOx formation characteristic in a heavy duty gas turbine annular combustion chamber. The predicted results show that proper adjusting pilot fuel percentage to control peak temperature and region with high temperature is an effective mean to decrease the emission of NOx in combustion chamber. Increase of pilot fuel percentage to improve the temperature of pilot diffusion flame is beneficial for ignition and stable combustion of premixed fuel gas. However, thermal NOx formation rate relatively rises with increasing of pilot fuel percentage in the region near central axis of the combustion chamber. The stoichiometric ratio in premixed stream decreases with the increasing of pilot fuel percentage which compress the premixed flame temperature and the formation of thermal NOx near the back flow region after the boss. There exists an optimal pilot fuel percentage to minimum NOx emission for this heavy duty gas turbine. Further increasing pilot fuel percentage will greatly improve the emission of NOx due to the diffusion combustion mode of pilot flame.关键词
燃气轮机/环形燃烧室/值班燃料比/化学当量比/NOx生成Key words
gas turbine/annular combustion chamber/pilot fuel percentage/stoichiometric ratio/NOx formation分类
信息技术与安全科学引用本文复制引用
石黎,付忠广,沈亚洲,刘炳含..值班燃料比对环形燃烧室内NOx生成影响的数值研究[J].中国电机工程学报,2016,36(22):6156-6163,8.基金项目
中央高校基本科研业务费专项资金资助项目(2014ZZD04，2014XS17)；北京市自然基金面上项目(3162030)。Project Supported by Fundamental Research Funds for the Central Universities (2014ZZD04,2014XS17) （2014ZZD04，2014XS17）
Beijing Natural Science Foundation (3162030) （3162030）
