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首页> 外文期刊>Space technology >A SPECTROMETRIC DEVICE TO MEASURE SPECIES CONCENTRATION CLOSE TO THE SURFACE DURING RE-ENTRY
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A SPECTROMETRIC DEVICE TO MEASURE SPECIES CONCENTRATION CLOSE TO THE SURFACE DURING RE-ENTRY

机译：分光装置，用于在重新进入过程中测量接近表面的物种浓度

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An innovative approach to measure the effects of heterogeneous catalysis during re-entry has been proposed for the instrumentation planned for the ESA-EXPERT mission. The goal is to measure the recombination coefficient during the EXPERT re-entry mission by measuring gas species close to the surface. The main elements of the diagnostic system are: a light capturing device and a multi-channel spectrometer. A sapphire pole is used to look directly at the surface during re-entry. The multi-channel spectrometer has 24 channels and a spectral resolution of 0.25 nm/pixel. By knowing the spectral emissions of species such as O, N and their molecules, including NO, it will be possible to determine the presence and concentration of these species. The recombination coefficient will be calculated by applying the kinetic model of Bruno et at. for heterogeneous catalysis. The surface heat flux must to be known to perform these calculations, and will eventually be provided by other EXPERT measurements. A preliminary test to validate the feasibility of the device has been planned by comparing the spectra obtained with the PARADE code using the EXPERT flight max heat flux data, and the spectra measured by the light capturing device and generated in the 1200 kW VKI Plasmatron.
机译：针对用于ESA-EXPERT任务的计划仪表，提出了一种创新的方法来测量重入过程中多相催化的影响。目的是通过测量接近地面的气体种类来测量EXPERT再入飞行任务期间的复合系数。诊断系统的主要元素是：光捕获设备和多通道光谱仪。再入期间，使用蓝宝石杆直接观察表面。多通道光谱仪具有24个通道，光谱分辨率为0.25 nm /像素。通过了解诸如O，N及其分子（包括NO）在内的物质的光谱发射，将有可能确定这些物质的存在和浓度。重组系数将通过应用Bruno等人的动力学模型来计算。用于多相催化。必须知道表面热通量才能执行这些计算，并且最终将由其他EXPERT测量提供。通过比较使用EXPERT飞行最大热通量数据使用PARADE代码获得的光谱，以及由光捕获装置测量并在1200 kW VKI Plasmatron中生成的光谱，已计划了验证该装置可行性的初步测试。

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