Experimental and Numerical Study of the C2H2 Jet Flames Flow Field

  • WU Junkai ,
  • WANG Du ,
  • LU Wen ,
  • LI Huakang ,
  • CHU Fengming ,
  • TIAN Zhenyu
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  • 1. Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100190, China
    2. College of Mechanical and Electrical Engineering, Beijing University of Chemical Technology, Beijing 100029, China
    3. University of Chinese Academy of Sciences, Beijing 100049, China

网络出版日期: 2025-07-04

基金资助

This work was supported by the National Science and Technology Major Project (J2019-III-0005-0048), NSFC (No. 52325604), National Key Research and Development Program (2021YFA0716200/ 2022YFB4003900), CAS Project for Young Scientists in Basic Research (YSBR-028), and the China Postdoctoral Science Foundation (No.2020M680670).

版权

Science Press, Institute of Engineering Thermophysics, CAS and Springer-Verlag GmbH Germany, part of Springer Nature 2025

Experimental and Numerical Study of the C2H2 Jet Flames Flow Field

  • WU Junkai ,
  • WANG Du ,
  • LU Wen ,
  • LI Huakang ,
  • CHU Fengming ,
  • TIAN Zhenyu
Expand
  • 1. Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100190, China
    2. College of Mechanical and Electrical Engineering, Beijing University of Chemical Technology, Beijing 100029, China
    3. University of Chinese Academy of Sciences, Beijing 100049, China

Online published: 2025-07-04

Supported by

This work was supported by the National Science and Technology Major Project (J2019-III-0005-0048), NSFC (No. 52325604), National Key Research and Development Program (2021YFA0716200/ 2022YFB4003900), CAS Project for Young Scientists in Basic Research (YSBR-028), and the China Postdoctoral Science Foundation (No.2020M680670).

Copyright

Science Press, Institute of Engineering Thermophysics, CAS and Springer-Verlag GmbH Germany, part of Springer Nature 2025

摘要

本研究从实验与数值模拟相结合的角度,对乙炔(C2H2)射流火焰的碳烟生成、组分分布、温度场及速度场特性进行了研究。基于新设计的18 W连续激光器搭建粒子图像测速(PIV)系统,实现了火焰流场速度的精确测量。实验结果表明,贫燃与富燃条件下的火焰速度存在显著差异。贫燃条件下火焰速度较高,而富燃条件则会引发更剧烈的反应,并在火焰根部形成涡流结构。通过建立二维计算模型,深入探究了当量比(Φ)对燃烧特性的影响规律:随着Φ从0.8增至1.5,OH、H和O等关键自由基的分布特征发生显著改变;当Φ继续升高时,碳烟颗粒开始生成。进一步研究发现,当量比的增加也影响了火焰轴线区域的碳烟成核、氧化及表面生长速率。本文构建的连续激光PIV系统不仅可精准获取乙炔射流火焰速度场数据,还可拓展应用于其他类型流场的速度测量研究。

本文引用格式

WU Junkai , WANG Du , LU Wen , LI Huakang , CHU Fengming , TIAN Zhenyu . Experimental and Numerical Study of the C2H2 Jet Flames Flow Field[J]. 热科学学报, 2025 , 34(4) : 1541 -1553 . DOI: 10.1007/s11630-025-2171-9

Abstract

A series of C2H2 jet flames were investigated with respect to the soot formation, species distribution, and velocity fields from both experimental and numerical point of view. The flame flow velocities were measured by a particle image velocity (PIV) with a newly-designed continuous laser of 18 W. The experimental results show a significant difference in flame velocity between lean and rich conditions. The lean condition exhibits higher flame velocity, while the rich condition leads to more intense reactions and the formation of vortices at the flame base. A 2-dimensional computational model was employed to investigate the influence of equivalence ratio Φ on combustion characteristics. As Φ increases from 0.8 to 1.5, the distributions of key free radicals such as OH, H, and O are affected. A further increase in Φ results in the generation of soot. Moreover, the increased Φ also affects the processes of axis soot nucleation, oxidation and surface growth rate. The continuous laser PIV system constructed in this paper can provide C2H2 jet flame velocity, which can be also used in other flow field to measure the flow field velocity.

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