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DF化学激光器扩压器恢复压力的研究

郭洲 张洪强 杨珍 颜飞雪

郭洲, 张洪强, 杨珍, 等. DF化学激光器扩压器恢复压力的研究[J]. 强激光与粒子束, 2025, 37: 021003. doi: 10.11884/HPLPB202537.240290
引用本文: 郭洲, 张洪强, 杨珍, 等. DF化学激光器扩压器恢复压力的研究[J]. 强激光与粒子束, 2025, 37: 021003. doi: 10.11884/HPLPB202537.240290
Guo Zhou, Zhang Hongqiang, Yang Zhen, et al. Study on recovery pressure of diffuser for DF chemical laser[J]. High Power Laser and Particle Beams, 2025, 37: 021003. doi: 10.11884/HPLPB202537.240290
Citation: Guo Zhou, Zhang Hongqiang, Yang Zhen, et al. Study on recovery pressure of diffuser for DF chemical laser[J]. High Power Laser and Particle Beams, 2025, 37: 021003. doi: 10.11884/HPLPB202537.240290

DF化学激光器扩压器恢复压力的研究

doi: 10.11884/HPLPB202537.240290
详细信息
    作者简介:

    郭 洲,472394449@qq.com

  • 中图分类号: O354.3

Study on recovery pressure of diffuser for DF chemical laser

  • 摘要: 在化学激光器的研制中,扩压器压力恢复的研究具有重要的工程应用价值,通过数值模拟结合试验的方式对氟化氘(DF)化学激光器的扩压器进行展开研究,主要针对扩压器的扩张角、结构类型等参数对扩压器性能的影响进行计算分析并进行试验验证。研究结果表明:平直段+8°扩张角的扩压器,抵抗高背压的能力较弱,通过减小扩张角至5°可以有效提高抵抗背压的能力;进一步优化后的超声速二次喉道扩压器能够再次提高扩压器的恢复压力,减小气流的能量损失,提高抗反压特性。针对不同模型的扩压器进行了实验验证,实验结果与数值模拟的结果趋势较一致。
  • 图  1  扩压器结构示意图

    Figure  1.  Diffuser in pressure recovery system

    图  2  传统型扩压器的计算和实验结果

    Figure  2.  Comparison of numerical and experimental results with traditional diffuser

    图  3  8°传统型扩压器的马赫数分布云图

    Figure  3.  Mach number contour of 8° diffuser angle

    图  4  5°扩张角的扩压器的马赫数分布云图

    Figure  4.  Mach number contour of 5° diffuser angle

    图  5  沿高度方向二次喉道扩压器的马赫数分布云图

    Figure  5.  Mach number contour of diffuser with secondary-throat along the height direction

    图  6  沿宽度方向二次喉道扩压器的马赫数分布云图

    Figure  6.  Mach number contour of diffuser with secondary-throat along the width direction

    图  7  不同扩张角的试验结果对比

    Figure  7.  Comparison of test results with different divergence angle

    图  8  有无二次喉道的试验结果对比

    Figure  8.  Comparison of test results with and without secondary-throat

    表  1  8°扩张角的扩压器静压分布

    Table  1.   Static pressure distribution along the length of diffuser with 8° expansion

    x/mm static pressure under 23.34 kPa back pressure/kPa static pressure under 24.53 kPa back pressure/kPa
    25 7.08 10.71
    250 8.59 16.25
    500 18.88 19.05
    750 19.15 20.03
    1200 19.15 21.64
    1800 23.24 23.8
    下载: 导出CSV

    表  2  5°扩张角的扩压器静压分布

    Table  2.   Static pressure distribution along the length of diffuser with 5° expansion

    x/mm static pressure under 23.34 kPa back pressure/kPa static pressure under 26.67 kPa back pressure/kPa
    25 7.07 7.07
    250 7.93 12.03
    500 8.53 18.13
    750 10.2 20.76
    1200 16.36 21.77
    1800 19.56 24.29
    2200 21.99 25.87
    2500 22.85 26.64
    下载: 导出CSV

    表  3  背压试验

    Table  3.   Back pressure tests

    back pressure/kPa pressure of laser cavity/kPa
    x=24 mm x=98 mm x=138 mm
    1.36 4.17 5.75 7.01
    13.19 4.04 5.33 6.65
    17.08 4.03 5.6 7
    20.63 4.13 5.71 6.96
    21.8 4 5.48 6.72
    下载: 导出CSV
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出版历程
  • 收稿日期:  2024-08-28
  • 修回日期:  2024-12-23
  • 录用日期:  2024-12-23
  • 网络出版日期:  2025-01-22
  • 刊出日期:  2025-02-15

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