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低温风洞极低露点原位在线测量技术研究

王斌 许振宇 张文清 阚瑞峰 盖文

王斌,许振宇,张文清,等. 低温风洞极低露点原位在线测量技术研究[J]. 实验流体力学,2022,36(X):1-10 doi: 10.11729/syltlx20210062
引用本文: 王斌,许振宇,张文清,等. 低温风洞极低露点原位在线测量技术研究[J]. 实验流体力学,2022,36(X):1-10 doi: 10.11729/syltlx20210062
WANG B,XU Z N,ZHANG W Q,et al. Research on ultra low dew point in-situ on-line measurement technology for cryogenic wind tunnel[J]. Journal of Experiments in Fluid Mechanics, 2022,36(X):1-10. doi: 10.11729/syltlx20210062
Citation: WANG B,XU Z N,ZHANG W Q,et al. Research on ultra low dew point in-situ on-line measurement technology for cryogenic wind tunnel[J]. Journal of Experiments in Fluid Mechanics, 2022,36(X):1-10. doi: 10.11729/syltlx20210062

低温风洞极低露点原位在线测量技术研究

doi: 10.11729/syltlx20210062
基金项目: 国家自然科学基金(11602292,61801479)
详细信息
    作者简介:

    王斌:(1983—),男,四川绵阳人,副研究员。研究方向:风洞测试,视觉测量,图像处理,人工智能。通信地址:四川省绵阳市涪城区二环路南段6号12信箱3分箱(621000)。E-mail:nudtwangbin@163.com

    通讯作者:

    E-mail:549816386@qq.com

  • 中图分类号: O355

Research on ultra low dew point in-situ on-line measurement technology for cryogenic wind tunnel

  • 摘要: 面向低温风洞极低露点原位在线测量需求,开展了基于激光吸收光谱的宽温域、高精度、极低露点原位在线测量技术研究。分析了激光吸收光谱露点测量技术原理,开展了吸收谱线选型、光谱参数标定和光谱信号处理方法研究,以及低温平台原位在线露点测量和0.3 m低温引导风洞露点测量,并与冷镜式露点仪比较了测量精度。研究结果表明:激光吸收光谱露点测量技术可以实现宽温域、高精度、原位在线露点测量,露点测量范围–100~30 ℃,测量误差小于1 ℃,测量时间低于1 s,可满足低温风洞极低露点测量需求。
  • 图  1  TDLAS露点测量开放光路示意图[15]

    Figure  1.  Schematic diagram of open optical path for TDLAS dew point measurement[15]

    图  2  TDLAS风洞试验段露点原位在线测量示意图

    Figure  2.  Schematic diagram of in situ online measurement of dew point with TDLAS in wind tunnel test section

    图  3  TDLAS测量原理图

    Figure  3.  Schematic diagram of TDLAS measurement

    图  4  水汽吸收带强度

    Figure  4.  strength of water vapor absorption band

    图  5  典型状态模拟吸收光谱

    Figure  5.  Typical state simulated absorption spectrum

    图  6  线强吸收峰值随露点变化

    Figure  6.  Variation of line strength absorption peak with dew point

    图  7  线强吸收峰值随温度变化

    Figure  7.  Variation of line strength absorption peak with temperature

    图  8  直接吸收、波长调制结合露点反演算法

    Figure  8.  Direct absorption, wavelength modulation and dew point inversion algorithm

    图  9  低温平台光谱标定

    Figure  9.  Spectral calibration with cryogenic platform

    图  10  温湿度箱内原位测量

    Figure  10.  In-situ measurement in Temperature and humidity box

    图  11  TDLAS与冷镜露点测量结果对比(–10~30 ℃)

    Figure  11.  Comparison of TDLAS and cold mirror dew point measurement results at –10 ~ 30 ℃

    图  12  低露点抽取式测量多次反射筒体设计图和实物

    Figure  12.  The multiple reflection cylinder for low dew point extraction measurement(design drawing and physical object)

    图  13  低露点抽取式测量

    Figure  13.  Low dew point extraction measurement

    图  14  −90 ~−10 ℃露点TDLAS与MBW373测量结果对比

    Figure  14.  The comparison of TDLAS and MBW373 measurement results at −90 ℃~−10 ℃

    图  15  TDLAS低温平台原位露点测量试验示意图

    Figure  15.  Schematic diagram of in situ dew point measurement test of TDLAS low temperature platform

    图  16  低温平台试验

    Figure  16.  Low temperature platform experiment

    图  17  原位露点测量结果

    Figure  17.  In situ dew point measurement results

    图  18  抽取式TDLAS露点测量结果与冷镜式露点仪测量结果对比

    Figure  18.  Comparison of dew point measurement results between extraction TDLAS and cold mirror dew point meter

    图  19  TDLAS原位测量与抽取式测量结果对比

    Figure  19.  Comparison of TDLAS in situ measurement and extraction measurement results

    图  20  0.3 m低温引导风洞冷镜式露点仪与TDLAS露点测量结果

    Figure  20.  Dew point temperature measurement results of cold mirror dew point instrument and TDLAS in 0.3 m low temperature guide wind tunnel

    表  1  选择光谱谱线参数和对应激光器

    Table  1.   Selection of spectral line parameters and corresponding lasers

    激光器吸收谱线/
    (cm–1
    线强参数/
    (cm–1·molecule–1
    露点测量
    覆盖范围/ ℃
    Laser 2–
    2626 nm
    3807.01.585×10–19–100~–40
    Laser 3–
    1854 nm
    5393.62.580×10–20–95~–25
    Laser 1–
    1383 nm
    7223.16.374×10–22–60~30
    7226.08.714×10–21
    7228.01.848×10–21
    下载: 导出CSV

    表  2  TDLAS与冷镜露点仪测量(计量)对比

    Table  2.   Measurement results of TDLAS and cold mirror dew point instrument

    设定露点/℃TDLAS测量/℃MBW373测量/℃偏差/℃
    –100–99.10–100.000.90
    –90–91.10–91.900.80
    –80–79.39–79.880.49
    –70–69.55–69.850.30
    –60–59.15–59.590.44
    –50–50.35–50.700.35
    –40–39.70–40.100.40
    –30–29.93–30.100.17
    –20–19.83–19.970.14
    –10–10.75–10.66–0.09
    0–0.75–0.780.03
    1010.369.980.38
    2020.5420.190.45
    3031.1030.790.31
    下载: 导出CSV
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出版历程
  • 收稿日期:  2021-06-17
  • 录用日期:  2021-09-19
  • 修回日期:  2021-09-06
  • 网络出版日期:  2022-06-20

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