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Effect of the mixing fields on the stability and structure of turbulent partially premixed flames in a concentric flow conical nozzle burner

机译:混合流对同心流锥形喷嘴燃烧器中部分预混湍流火焰稳定性和结构的影响

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摘要

The mixing field is known to be one of the key parameters that affect the stability and structure of partially premixed flames. Data in these flames are now available covering the effects of turbulence, combustion system geometry, level of partially premixing and fuel type. However, quantitative analyses of the flame structure based on the mixing field are not yet available. The aim of this work is to present a comprehensive study of the effects of the mixing fields on the structure and stability of partially premixed methane flames. The mixing field in a concentric flow conical nozzle (CFCN) burner with well-controlled mechanism of the mixing is investigated using Rayleigh scattering technique. The flame stability, structure and flow field of some selected cases are presented using LIF of OH and PIV. The experimental data of the mixing field cover wide ranges of Reynolds number, equivalence ratio and mixing length.
机译:众所周知,混合场是影响部分预混火焰的稳定性和结构的关键参数之一。现在可获得这些火焰中的数据,包括湍流,燃烧系统的几何形状,部分预混的程度和燃料类型的影响。然而,基于混合场的火焰结构的定量分析尚不可用。这项工作的目的是对混合场对部分预混甲烷火焰的结构和稳定性的影响进行全面研究。利用瑞利散射技术研究了具有良好混合控制机制的同心流锥形喷嘴(CFCN)燃烧器的混合场。使用OH和PIV的LIF给出了一些选定案例的火焰稳定性,结构和流场。混合场的实验数据涵盖了雷诺数,当量比和混合长度的广泛范围。

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  • 来源
    《Combustion and Flame》 |2017年第1期|180-200|共21页
  • 作者单位

    Amer Univ Cairo, Dept Mech Engn, AUC Ave,POB 74, New Cairo 11835, Egypt|Cairo Univ, Dept Power Mech Engn, Fac Engn, Cairo, Egypt;

    King Abdullah Univ Sci & Technol, Clean Combust Res Ctr, Thuwal, Saudi Arabia|Helwan Univ, Mech Power Engn Dept Fac Engn, Fac Engn, Helwan, Egypt;

    King Abdullah Univ Sci & Technol, Clean Combust Res Ctr, Thuwal, Saudi Arabia;

    Cairo Univ, Dept Power Mech Engn, Fac Engn, Cairo, Egypt|Cairo Univ, Natl Inst Laser Enhanced Sci, Giza, Egypt;

    Univ Sydney, Fac Engn & Informat Technol, Sch Aerosp Mech & Mechatro Engn, Sydney, NSW 2006, Australia;

    Univ Sydney, Fac Engn & Informat Technol, Sch Aerosp Mech & Mechatro Engn, Sydney, NSW 2006, Australia;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Partially premixed; lnhomogeneity; Mixing field; Stability; Flow field; Rayleigh;

    机译:部分预混合非均匀性混合场稳定性流场瑞利;

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