曾徽, 文鹏, 杨国铭, 等. 基于吸收/发射光谱的火星进入地面模拟流场特性研究[J]. 实验流体力学, doi: 10.11729/syltlx20220101.
引用本文: 曾徽, 文鹏, 杨国铭, 等. 基于吸收/发射光谱的火星进入地面模拟流场特性研究[J]. 实验流体力学, doi: 10.11729/syltlx20220101.
ZENG H, WEN P, YANG G M, et al. Absorption/emission spectra diagnosis in ground-based experimental simulation for Mars entry[J]. Journal of Experiments in Fluid Mechanics, doi: 10.11729/syltlx20220101.
Citation: ZENG H, WEN P, YANG G M, et al. Absorption/emission spectra diagnosis in ground-based experimental simulation for Mars entry[J]. Journal of Experiments in Fluid Mechanics, doi: 10.11729/syltlx20220101.

基于吸收/发射光谱的火星进入地面模拟流场特性研究

Absorption/emission spectra diagnosis in ground-based experimental simulation for Mars entry

  • 摘要: 火星进入器与地球返回器面临的热环境有很大不同。利用电弧风洞模拟火星进入器气动加热环境,进行防热系统设计是火星进入器研制的关键环节。利用发射光谱和中红外量子级联激光吸收光谱测量技术,开展了CO2气氛下的辐射特性和电弧加热火星进入地面流场特性的在线定量研究,获得了电弧加热器CO2等离子体电子激发温度、喷管出口自由流静温和关键组分CO摩尔浓度的实时测量结果。发射光谱和激光吸收光谱测量结果表明,电弧加热器具有非常好的长时间稳定运行能力和气流参数重复模拟能力。本文发展的光谱诊断技术可为火星进入器气动热环境流场特性等方面的研究提供有效测量手段。

     

    Abstract: Simulation of the aerothermal environment for Mars entry by the arc-heated plasma wind tunnel is a key to develop the thermal protection system (TPS), since the thermal environment for Mars entry is very different from that of earth reentry. In this study, in-situ quantitative measurements of the radiation characteristics of CO2 plasma and the flow parameters of the simulating freestream for mars entry were carried out by using emission spectroscopy and mid-infrared quantum cascade laser absorption spectroscopy. The electron temperature of the CO2 plasma in the arc heater and the static temperature and CO concentration in the freestream were obtained. The emission spectroscopy and laser absorption spectroscopy measurements show that the arc heater has good stability for long-term operation and a capability for repeatable simulation of the flow parameters. The developed spectral diagnostic technology in this study provides an effective measurement method for studying the flow characteristics of the Mars entry aerothermal environment.

     

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