The impact of chemical non-equilibrium models on the ultraviolet spectral radiation characteristics of shock layers

Huigang Shi; Lu Bai; Jun Zhou; Yin Li; Ligong Zhang

doi:10.1117/12.3032240

26 July 2024 The impact of chemical non-equilibrium models on the ultraviolet spectral radiation characteristics of shock layers

Huigang Shi, Lu Bai, Jun Zhou, Yin Li, Ligong Zhang

Author Affiliations +

Proceedings Volume 13189, Second Conference on Space, Atmosphere, Marine, and Environmental Optics (SAME 2024); 131890F (2024) https://doi.org/10.1117/12.3032240
Event: Second Conference on Space, Atmosphere, Marine, and Environmental Optics (SAME 2024), 2024, Hangzhou, China

Abstract

The primary purpose of this research is to analyze the impact of different chemical reaction models on the characteristics of NO ultraviolet spectral radiation in the shock layer of hypersonic vehicles. The study is conducted from two main aspects. Firstly, three different non-equilibrium chemical reaction models—Gupta, Park, and the modified Ozawa model—were used to simulate the non-equilibrium flow field in the shock layer of the vehicle. Secondly, we further analyzed the effects of different chemical reaction models on the formation of substances in the shock layer and the characteristics of NO ultraviolet spectral radiation. In this paper, we conducted an in-depth study and analysis using the typical flight case of the BSUV (Bow-shock Ultraviolet) flight experiment, which revealed that the non-equilibrium chemical reaction models in the shock layer significantly influence the concentration and distribution of substances, thereby affecting the ultraviolet spectral radiation. By comparing the computational results with the experimental detection spectra, the Park model showed better agreement with the experimental data, with a weighted error below 10%, outperforming the Gupta chemical reaction model. The Park model exhibits comprehensive performance in the current computational cases.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Huigang Shi, Lu Bai, Jun Zhou, Yin Li, and Ligong Zhang "The impact of chemical non-equilibrium models on the ultraviolet spectral radiation characteristics of shock layers", Proc. SPIE 13189, Second Conference on Space, Atmosphere, Marine, and Environmental Optics (SAME 2024), 131890F (26 July 2024); https://doi.org/10.1117/12.3032240

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KEYWORDS

Ultraviolet radiation

Chemical reactions

Vibration

Data modeling

Chemical analysis

Chemistry

Ionization

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