Numerical study on premixed combustion stability in gas turbine combustor

XIAO Junfeng; WANG Wei; WANG Feng; LI Xiaofeng

doi:10.19666/j.rlfd.201802064

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Numerical study on premixed combustion stability in gas turbine combustor

Thermal Power Generation Vol. 47, Issue 8, Pages: 61-65(2018)

更新时间：2025-09-28

- Numerical study on premixed combustion stability in gas turbine combustor
- 作者机构：
  
  西安热工研究院有限公司
- 作者简介：
- 基金信息：
- DOI：10.19666/j.rlfd.201802064
  CLC： TK121
- Published Online：02 August 2018，
  
  Published：2018
- 稿件说明：
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XIAO Junfeng, WANG Wei, WANG Feng, et al. Numerical study on premixed combustion stability in gas turbine combustor[J]. Thermal Power Generation, 2018, 47(8): 61-65.
DOI：

XIAO Junfeng, WANG Wei, WANG Feng, et al. Numerical study on premixed combustion stability in gas turbine combustor[J]. Thermal Power Generation, 2018, 47(8): 61-65. DOI： 10.19666/j.rlfd.201802064.

摘要

为充分理解燃气轮机燃烧不稳定特性

以某型燃气轮机旋流燃烧室为模型

对其预混燃烧过程进行了数值研究。结果表明:燃料/空气当量比会影响燃烧不稳定形成过程及其压力振荡特性

燃料/空气当量比越大

触发燃烧不稳定的时间越短

燃烧室内压力脉动主频越高

压力脉动主频振幅越大;距燃烧室喷嘴越近

燃烧室压力脉动振幅越大;涡旋脉动导致的火焰面面积变化极可能是引起燃烧室压力高频脉动的主要原因。

Abstract

In order to fully understand the combustion instability of gas turbine

numerical study on premixed combustion process is conducted using a gas turbine swirling combustor as a model. The results show that the fuel/air equivalence ratio can affect the formation process of combustion instability and its pressure oscillation characteristics. With an increase in the fuel/air equivalence ratio

the time for triggering combustion instability decreases

the basic frequency of the pressure oscillation in combustor increases

and the basic frequency amplitude of the pressure oscillation increases. Besides

the closer to the combustor nozzle

the greater the amplitude of the pressure oscillation in combustor. The high-frequency pressure oscillation in combustor is probably due to the change of the area of the flame surface caused by the vortex oscillation.

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