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首页> 外文期刊>Applied optics >Spectrally resolved, 1D, mid-infrared imaging of temperature, CO2, and HCl in propellant flames
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Spectrally resolved, 1D, mid-infrared imaging of temperature, CO2, and HCl in propellant flames

机译：光谱分辨，1D，温度中红外成像的温度，CO 2和HCl在推进剂中

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摘要

This work presents a high-speed, spectrally resolved, mid-infrared imaging diagnostic for providing 1D measurements of gas temperature and relative mole fraction of CO2 and HCl in flames. An imaging spectrometer and a high-speed mid-infrared camera were used to provide 1D measurements of CO2 and HCl emission spectra from 2386 to 2402 cm(-1) with a spectral resolution of 0.46 cm(-1), and simulated emission spectra were least-squares fit to the data to determine the aforementioned gas properties. Measurements were acquired in HMX and AP-HTPB flames burning in air at 1 atm. This diagnostic was applied to characterize how the path-integrated gas temperature of HMX flames varies in time and with distance above the burning surface. Additionally, Abel inversion with Tikhonov regularization was applied to determine the radial distribution of temperature and relative concentration of CO2 and HCl within the core of AP-HTPB flames. The results demonstrate that this diagnostic has potential to further our understanding of propellant combustion physics by quantifying thermochemical flame structure at rates up to 2 kHz. (C) 2021 Optical Society of America
机译：这项工作提出了一种高速、光谱分辨率的中红外成像诊断方法，用于提供火焰中气体温度和CO2和HCl相对摩尔分数的一维测量。使用成像光谱仪和高速中红外相机对2386至2402 cm（-1）范围内的CO2和HCl发射光谱进行1D测量，光谱分辨率为0.46 cm（-1），模拟发射光谱与数据进行最小二乘拟合，以确定上述气体性质。在1 atm空气中燃烧的HMX和AP-HTPB火焰中进行测量。该诊断用于描述HMX火焰的路径积分气体温度随时间和距离燃烧表面的变化。此外，采用Tikhonov正则化的Abel反演方法确定了AP-HTPB火焰核心内温度和CO2和HCl相对浓度的径向分布。结果表明，这种诊断有可能通过量化高达2 kHz的热化学火焰结构，进一步加深我们对推进剂燃烧物理的理解。（2021）美国光学学会

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  • 来源
    《Applied optics》 |2021年第16期|共11页
  • 作者

    McDonald Austin; Tancin Ryan J.; Goldenstein Christopher S.;

  • 作者单位

    Purdue Univ Sch Mech Engn 585 Purdue Mall W Lafayette IN 47907 USA;

    Purdue Univ Sch Aeronaut &

    Astronaut 701 W Stadium Ave W Lafayette IN 47907 USA;

    Purdue Univ Sch Mech Engn 585 Purdue Mall W Lafayette IN 47907 USA;

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