摘要
参考某型燃气轮机燃烧室,建立了全尺寸燃烧室数值模型,并结合电厂实际运行数据,研究了空气含湿量对燃气轮机扩散燃烧和预混燃烧性能的影响。结果表明,湿空气会增加燃烧室火焰高度,降低燃烧室出口平面平均温度,且含湿量越大,火焰高度越高,燃烧室出口平面温度越低,燃烧室NOx排放越低。燃烧室出口平面温度分布系数?T随含湿量的变化规律与燃烧方式相关:在扩散燃烧模式下,其随空气含湿量增加而减小;在预混燃烧模式下,?T随含湿量增加而增加;相比干空气,采用湿空气燃烧,燃烧室内压力脉动主频振幅增加,燃烧室燃烧稳定性变差。
The real engine scale numerical model of a certain type of gas turbine combustor is established. Combining with the actual operation data of power plants, the influences of humidity ratio on the gas turbine diffusion combustion and premixed combustion performances are studied. The results show that, wet air will increase the flame height in the combustion chamber and decrease the average temperature in outlet level of the combustion chamber. With an increase in air humidity ratio, the flame height increases, and the average combustor outlet temperature and NOx emission decreases. Furthermore, the overall temperature distribution factor θT is a function of the air humidity ratio as well as the combustion mode, it decreases with the increasing air humidity ratio in the diffusion combustion, but increases in the premixed combustion. Compared with dry air combustion, using wet air in the combustion will make the main frequency amplitude of pressure pulsation in the combustor increase and the combustion stability turn worse.
作者
肖俊峰
王玮
胡孟起
李晓丰
王峰
夏林
XIAO Junfeng;WANG Wei;HU Mengqi;LI Xiaofeng;WANG Feng;XIA Lin(Xi'an Thermal Power Research Institute Co., Ltd., Xi抋n 710054, China)
出处
《热力发电》
CAS
北大核心
2019年第4期84-89,共6页
Thermal Power Generation
基金
中国华能集团有限公司总部科技项目(HNKJ17-H17)
西安热工研究院有限公司研究开发项目(TI-18-TYK06)~~
关键词
燃气轮机
含湿量
燃烧不稳定性
燃烧室
扩散燃烧
预混燃烧
NOX排放
gas turbine
humidity ratio
combustion instability
combustion chamber
diffusion combustion
premixed combustion
NOx emission
