华电技术 ›› 2020, Vol. 42 ›› Issue (5): 31-36.

• 燃气发电 • 上一篇    下一篇

9E型燃气轮机DLN1.0燃烧系统数值分析

  

  1. 华电电力科学研究院有限公司,杭州 310030
  • 出版日期:2020-05-25 发布日期:2020-06-08

 Numerical analysis on 9E gas turbine DLN1.0 combustion system

  1.  
    Huadian Electric Power Research Institute Company Limited,Hangzhou 310030,China
  • Online:2020-05-25 Published:2020-06-08

摘要: 为了解当前低污染燃烧室的设计特点,采用数值仿真模拟了DLN1.0燃烧室出现的全部燃烧状态,并将燃烧 调整工况下NOx排放值与仿真结果对比,结果表明:DLN1.0燃烧室存在3个可用于燃烧的回流区,初级模式和贫贫 模式下文丘里管流速较高;热负荷最大的是转换模式,最小的是预混模式;高温区位置出现在文丘里管和二级喷嘴 附近;燃烧调整过程中,中心燃烧区与外侧燃烧区局部NOx生成量的变化趋势相反,随着一级燃烧区燃料流量增加, 燃烧室出口NOx排放浓度先降至最低点然后缓慢增加。

关键词: 燃气轮机, 燃烧调整, DLN1.0, 数值仿真, NOx排放

Abstract:  To understand the design features of current low-pollution combustion chambers,numerical simulation was used

to simulate all combustion states in a DLN1.0 combustion chamber,and the actual NOx emission under combustion
adjustment state was compared with the simulation results. The results show that there are three recirculation zones
available for combustion in the DLN1.0 combustion chamber.The primary and lean-lean modes are of a higher flow velocity
in the Venturi tube. The conversion mode is of the highest heat load,and the premixed mode is of the lowest. The high
temperature zone is around the Venturi tube and the secondary nozzles.During the combustion adjusting process,the NOx
generated locally in the central combustion zone and in the outer combustion zone show an opposite variation trend.As the
fuel flow in the first-stage combustion zone increases,the mass concentration of NOx discharges from the combustion
chamber outlet drop to the bottom and increase slowly afterwards.

Key words: gas turbine, combustion adjustment, DLN1.0, numerical simulation, NOx emission