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平板式预膜喷嘴雾化特性

刘凯 李宗禹 曾文 王方

刘凯, 李宗禹, 曾文, 等. 平板式预膜喷嘴雾化特性[J]. 航空动力学报, 2024, 39(7):20220062 doi: 10.13224/j.cnki.jasp.20220062
引用本文: 刘凯, 李宗禹, 曾文, 等. 平板式预膜喷嘴雾化特性[J]. 航空动力学报, 2024, 39(7):20220062 doi: 10.13224/j.cnki.jasp.20220062
LIU Kai, LI Zongyu, ZENG Wen, et al. Atomization characteristics of planar prefilming nozzle[J]. Journal of Aerospace Power, 2024, 39(7):20220062 doi: 10.13224/j.cnki.jasp.20220062
Citation: LIU Kai, LI Zongyu, ZENG Wen, et al. Atomization characteristics of planar prefilming nozzle[J]. Journal of Aerospace Power, 2024, 39(7):20220062 doi: 10.13224/j.cnki.jasp.20220062

平板式预膜喷嘴雾化特性

doi: 10.13224/j.cnki.jasp.20220062
基金项目: 国家科技重大专项(2017-1-00014-0005)
详细信息
    作者简介:

    刘凯(1971-),男,副教授,博士,研究方向为低污染燃烧技术

    通讯作者:

    曾文(1976-),男,教授,博士,研究方向为燃烧机理。 E-mail:zengwen928@sohu.com

  • 中图分类号: V231.2

Atomization characteristics of planar prefilming nozzle

  • 摘要:

    试验研究了韦伯数、气液动量比对预膜喷嘴雾化特性的影响。应用高速相机正面拍摄获得油膜表面波动形态,并用本征正交分解法分析了油膜波动频率,利用液相不连续思想获取油膜厚度;应用相位多普勒粒子分析仪获得了油滴索太尔直径。结果表明:气液动量比对油膜厚度影响较大,韦伯数对油膜波动频率影响较大。气液动量比由0.75增大到30.39,最小油膜厚度由0.38 mm减小到0.15 mm,而雾化粒度仅由38.8 μm减小到33.5 μm;韦伯数由11.91增大到61.51,油膜波动频率由2.9 Hz增大到207.0 Hz,初始雾化距离明显减小,雾化粒度由37.1 μm减小到24.9 μm。

     

  • 图 1  试验系统框图

    Figure 1.  Diagram of test system

    图 2  预膜喷嘴

    Figure 2.  Prefilming nozzle

    图 3  试验段

    Figure 3.  Test section

    图 4  喷嘴正面雾化图片

    Figure 4.  Atomization picture on the front of the nozzle

    图 5  测量系统框图

    Figure 5.  Diagram of measurement system

    图 6  试验系统图片

    Figure 6.  Picture of test system

    图 7  油膜原始图像及边界

    Figure 7.  Original image and boundary of oil film

    图 8  油膜厚度

    Figure 8.  Oil film thickness

    图 9  油膜平均厚度

    Figure 9.  Average thickness of oil film

    图 10  试验测点分布图

    Figure 10.  Distribution of test points

    图 11  不同韦伯数下雾化粒度

    Figure 11.  Atomization particle size with different We

    图 12  不同气液动量比雾化粒度

    Figure 12.  Atomization particle size with different γ

    表  1  试验工况

    Table  1.   Test conditions

    工况 燃油速度/
    (m/s)
    空气速度/
    (m/s)
    韦伯数 气液动量比
    1 0.14 22 11.91 30.39
    2 0.21 30 22.15
    3 0.28 50 61.51
    4 0.38 30 22.15 9.28
    5 0.678 2.92
    6 1.34 0.75
    下载: 导出CSV

    表  2  不同韦伯数油膜波动频率

    Table  2.   Oil film fluctuation frequency with different We

    韦伯数波动频率/Hz
    11.912.9
    22.1590.5
    61.51207.0
    下载: 导出CSV

    表  3  不同气液动量比油膜波动频率

    Table  3.   Oil film fluctuation frequency with differentγ

    气液动量比波动频率/Hz
    30.3990.5
    9.2818.1
    2.9230.1
    0.7541.3
    下载: 导出CSV

    表  4  不同韦伯数雾化粒度

    Table  4.   SMD with different We

    韦伯数雾化粒度/μm
    距预膜板尾缘距离/mm
    510152025
    11.9146.045.040.137.437.1
    22.1541.439.237.134.531.2
    61.5134.129.425.224.224.9
    下载: 导出CSV

    表  5  不同气液动量比雾化粒度

    Table  5.   SMD with different $ \boldsymbol{\gamma } $

    气液
    动量比
    雾化粒度/μm
    距预膜板尾缘距离/mm
    5 10 15 20 25
    9.28 45.0 40.5 37.6 36.3 33.5
    2.92 47.6 42.7 38.2 36.2 36.0
    0.75 63.5 53.9 47.4 42.1 38.8
    下载: 导出CSV
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出版历程
  • 收稿日期:  2022-02-11
  • 网络出版日期:  2024-03-04

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