A comparative experimental study of turbulent non premixed flames stabilized by a bluff-body burner

被引：29
|
作者：
Caerano, Nattan Roberto [1 ]
Figueira da Silva, Luis Fernando [2 ]
机构：
[1] Univ Fed Rio Grande do Sul, BR-90050170 Porto Alegre, RS, Brazil
[2] Pontificia Univ Catolica Rio de Janeiro, BR-22451900 Rio De Janeiro, RJ, Brazil
来源：
EXPERIMENTAL THERMAL AND FLUID SCIENCE | 2015年 / 63卷
关键词：
Combustion; Turbulence; Intermittently lifted flames; Particle Image Velocimetry; Laser Induced Fluorescence; PIV MEASUREMENTS; JET FLAMES; OH; COMBUSTION; VELOCITY; FLOW; SIMULATION; FIELDS; PLIF; CH;
D O I：
10.1016/j.expthermflusci.2015.01.006
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
Turbulent non-premixed flames of natural gas and air stabilized in a semi-infinite bluff-body burner are assessed in this work. Different situations are investigated corresponding either to jet or to wake-dominated flow fields. Measurements of the OH radical fluorescence and of the velocity field are obtained by joint Planar Laser Induced Fluorescence (PLIF) and Particle Image Velocimetry (PIV) techniques. First, a study of two chemically inert cases is presented to base the flow field structure. Then, the instantaneous OH fluorescence and velocity fields analysis underscore the local extinctions and the interactions between combustion and turbulence. A comparison between the Reynolds stresses distribution reveals that the flame presence generates turbulence in intermittently lifted situations and suppresses part of the Reynolds stresses when fully lifted. (C) 2015 Elsevier Inc. All rights reserved.
引用
收藏
页码：20 / 33
页数：14
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