Journal of Shanghai Jiao Tong University

Journal of Shanghai Jiaotong University >

2024 , Vol. 58 >Issue 8: 1139 - 1147

DOI: https://doi.org/10.16183/j.cnki.jsjtu.2023.076

Mechanical Engineering

Experimental Study of Influence of Secondary Combustion on Combustion Characteristics of Axial Staged Combustor

  • SUI Yongfeng ,
  • ZHANG Yuming ,
  • ZANG Peng ,
  • JIA Yuliang ,
  • HENG Sijiang ,
  • FU Yanni ,
  • GE Bing
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  • 1. Zhejiang Rancon Turbine Machinery Co., Ltd., Hangzhou 310022, China
    2. School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
    3. Hangzhou Steam Turbine Co., Ltd., Hangzhou 310022, China

Received date: 2023-03-06

  Revised date: 2023-04-17

  Accepted date: 2023-05-18

  Online published: 2023-05-31

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Abstract

In order to obtain the influencing rule of secondary combustion on emissions and combustion oscillation characteristics of gas turbine axial staged combustor in non-premixed combustion mode and explore a load increasing mode with stable low emission, an axial staged combustor for F-class gas turbines is selected for experimental study. The results show that CO consumption is restrained and CO emission increases sharply when secondary fuel is added at a lower combustor outlet temperature. The addition of secondary fuel and the increase of secondary equivalence ratio lead to the reduction of NOx emission, but the increase of load can weaken the ability of secondary fuel to reduce NOx emission. The addition of secondary fuel and the increase of secondary equivalence ratio restrain the combustion oscillation in the low frequency band (75—90 Hz). When the secondary equivalence ratio is higher than a certain threshold (0.19), the addition of secondary fuel can restrain higher frequency(175—210 Hz) combustion oscillation. In addition, by comprehensively considering the influence of secondary combustion on emissions and combustion oscillation, the operating range and load increasing mode of low emissions and stable combustion of axial staged combustor in the higher load range (20%—50% load) are obtained, which provides a reference for stable low emission operation of the unit during load increasing.

Key words： axial staged combustor; non-premixed combustion mode; secondary combustion; emission; combustion oscillation

Cite this article

SUI Yongfeng , ZHANG Yuming , ZANG Peng , JIA Yuliang , HENG Sijiang , FU Yanni , GE Bing . Experimental Study of Influence of Secondary Combustion on Combustion Characteristics of Axial Staged Combustor[J]. Journal of Shanghai Jiaotong University, 2024 , 58(8) : 1139 -1147 . DOI: 10.16183/j.cnki.jsjtu.2023.076

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