高可控非稳态对冲扩散火焰的实现及其时变流场特征

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高可控非稳态对冲扩散火焰的实现及其时变流场特征

更新时间：2025-07-09

- 高可控非稳态对冲扩散火焰的实现及其时变流场特征
- Issue 2, Pages: 49-56(2023)
- 作者机构：
  
  1. 武汉理工大学汽车工程学院
  2. 先进汽车零部件技术湖北省重点实验室
- 作者简介：
- 基金信息：
- DOI：
  CLC： TQ038
- Published：2023
- 稿件说明：
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[J]. 2023, (2): 49-56.
DOI：

[J]. 2023, (2): 49-56. DOI：

摘要

为研究火焰拉伸变化对流场、碳烟生成的瞬态效应，进一步完善层流火焰面模型在湍流火焰中的应用，设计并搭建了一个高可控的声激励对冲火焰燃烧器及其流场和碳烟浓度场的测量系统，利用相位锁定的粒子图像测速和激光诱导白炽光技术，测量了简谐振荡的对冲火焰中流场以及碳烟生成随时间的变化特性。结果表明：设计的声激励对冲燃烧器喷嘴出口速度为非均匀分布；非稳态工况下，施加的声激励电压信号幅值与出口速度振幅呈线性关系，频率为40 Hz的乙烯和丙烷火焰出口速度分别滞后电压信号0.09、0.14周期；随着电压信号频率的增加，速度的滞后程度也随之扩大。此外，40 Hz频率下乙烯火焰的碳烟体积分数滞后准稳态值0.35周期，具有明显的瞬态效应。研究成果可为非稳态层流火焰面模型开发提供理论依据。

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