Experimental Study on Turbulent Premixed Flames of Syngas Oxyfuel Mixtures at High Pressure

doi:10.7652/xjtuxb201310015

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Experimental Study on Turbulent Premixed Flames of Syngas Oxyfuel Mixtures at High Pressure

更新时间：2025-07-09

- Experimental Study on Turbulent Premixed Flames of Syngas Oxyfuel Mixtures at High Pressure
- Vol. 47, Issue 10, Pages: 87-90(2013)
- 作者机构：
  
  西安交通大学动力工程多相流国家重点实验室,西安,710049
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb201310015
  CLC： TK16
- Online First：10 October 2013，
  
  Published：2013
- 稿件说明：
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Experimental Study on Turbulent Premixed Flames of Syngas Oxyfuel Mixtures at High Pressure[J]. 2013, 47(10): 87-90.
DOI：

Experimental Study on Turbulent Premixed Flames of Syngas Oxyfuel Mixtures at High Pressure[J]. 2013, 47(10): 87-90. DOI： 10.7652/xjtuxb201310015.

摘要

为了理解高压下合成气纯氧预混湍流火焰中火焰与流动的耦合作用

利用OH-PLIF激光测量技术开展了高压条件下合成气纯氧预混湍流火焰结构研究

获得了高压下预混湍流火焰前锋面结构

得到了火焰前锋面尺度信息

包括火焰体积、火焰面密度和火焰前锋面尺度

并分析了预混湍流火焰前锋面与湍流尺度和层流火焰尺度的相互作用关系。研究结果表明:高压预混湍流火焰前锋面为褶皱火焰面结构

火焰面为小尺度的尖峰结构和大尺度的树干状结构互相叠加; 合成气火焰前锋面结构比甲烷混合气火焰更加精细

尺度更小; 合成气预混湍流火焰体积较小

放热区较小

在预混贫燃燃气轮机燃烧室中容易产生燃烧振荡; 合成气和甲烷火焰在湍流燃烧速率上表现出不同的转折规律

这可以通过火焰前锋面尺度和火焰自身不稳定性尺度来解释; 湍流流动对火焰前锋面的扰动受到火焰自身不稳定尺度的限制。

Abstract

An experimental study on turbulent premixed CO/H

/CO

flames as a model of syngas combustion was conducted to understand the flame-turbulence interaction of syngas oxyfuel turbulent premixed flames at high pressure. The instantaneous flame front structure of the turbulent premixed flames at high pressure was obtained with the OH-PLIF technique. The quantitative flame front structure parameters like flame volume

flame surface density and flame front scale were derived. The flame-turbulence interaction was analyzed for various mixtures. The results show that the flame front structure of syngas flames is much finer and has a smaller scale compared with that of CH

/air flame. The syngas flames with th

e narrow heat release region tend to show combustion oscillation in the premixed-type gas turbine combustor. The bending of S

with u'/S

is not observed for CO/H

/CO

/air flames while it is observed for other flames

and one reason for this could be that the wrinkle of the flame front due to turbulence is limited by the flame intrinsic instability.

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references

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