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不同气量分配下声激励对中心分级旋流火焰动力学的影响

魏为 许全宏 苏童 韩啸 杨思恒 周宇晨

魏为,许全宏,苏童,等.不同气量分配下声激励对中心分级旋流火焰动力学的影响[J].航空动力学报,2022,37(8):1607‑1619. doi: 10.13224/j.cnki.jasp.20210573
引用本文: 魏为,许全宏,苏童,等.不同气量分配下声激励对中心分级旋流火焰动力学的影响[J].航空动力学报,2022,37(8):1607‑1619. doi: 10.13224/j.cnki.jasp.20210573
WEI Wei,XU Quanhong,SU Tong,et al.Effects of acoustic exon the dynamics of centrically⁃staged swirling stratified flames under different air split ratios[J].Journal of Aerospace Power,2022,37(8):1607‑1619. doi: 10.13224/j.cnki.jasp.20210573
Citation: WEI Wei,XU Quanhong,SU Tong,et al.Effects of acoustic exon the dynamics of centrically⁃staged swirling stratified flames under different air split ratios[J].Journal of Aerospace Power,2022,37(8):1607‑1619. doi: 10.13224/j.cnki.jasp.20210573

不同气量分配下声激励对中心分级旋流火焰动力学的影响

doi: 10.13224/j.cnki.jasp.20210573
基金项目: 

国家科技重大专项(2017⁃Ⅲ⁃0007⁃0032) 

详细信息
    作者简介:

    魏为(1997-),男,博士生,研究领域为燃烧及传热传质(航空发动机低排放燃烧室)。E⁃mail:sy1904419@buaa.edu.cn

    通讯作者:

    许全宏(1969-),男,副研究员,博士,研究领域为燃烧及传热传质(航空发动机低排放燃烧室)、燃烧室冷却、高温高压试验。E⁃mail:xuquanhong@buaa.edu.cn

  • 中图分类号: V231.2

Effects of acoustic excitation on the dynamics of centrically⁃staged swirling stratified flames under different air split ratios

  • 摘要:

    采用高速摄像拍摄火焰化学自发光和本征正交分解(POD)法研究了多激励频率下中心分级旋流分层火焰的宏观结构和动力学特性。结果表明:随着气量分配比的增加,火焰宏观结构逐渐沿径向方向扩张,火焰分层现象变得更加明显。激励频率的变化对火焰宏观结构的影响较小。POD分析结果表明:外激频率为200 Hz时火焰脉动最明显。随着主燃级气量占比的增加,释热脉动在激励的作用下沿轴向方向减弱,在径向上出现极值交替且振荡变强。

     

  • 图 1  实验系统图

    Figure 1.  Experimental setup

    图 2  不同气量分配下时均火焰图像与Abel逆变换火焰图像对比

    Figure 2.  Comparison of time⁃averaged flame images and the corresponding Abel inverse transformed images under different values of air split ratio

    图 3  气量分配比为1时不同外激频率下的时均火焰图像

    Figure 3.  Time⁃averaged flame images at different excitation frequencies when air split ratio equals 1

    表  表 1  实验工况参数表

    Table  表 1.   Experimental conditions

    空气总流量/(g/s)主燃级空气流量/(g/s)预燃级空气流量/(g/s)总当量比分层比主燃级当量比主燃级甲烷流量/(g/s)预燃级甲烷流量/(g/s)
    10.40.60.9510.950.0220.033
    10.50.50.9510.950.0280.028
    10.60.40.9510.950.0330.022
    下载: 导出CSV
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  • 收稿日期:  2021-10-11

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