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Flow Enthalpy of Nonequilibrium Plasma in 1 MW Arc-Heated Wind Tunnel

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Title: Flow Enthalpy of Nonequilibrium Plasma in 1 MW Arc-Heated Wind Tunnel
Authors: Takahashi, Yusuke Browse this author →KAKEN DB
Enoki, Naoya Browse this author
Koike, Taiki Browse this author
Tanaka, Mayuko Browse this author
Yamada, Kazuhiko Browse this author
Shimoda, Takayuki Browse this author
Issue Date: Jan-2021
Publisher: The American Institute of Aeronautics and Astronautics
Journal Title: AIAA Journal
Volume: 59
Issue: 1
Start Page: 263
End Page: 275
Publisher DOI: 10.2514/1.J058407
Abstract: The flow enthalpy of an arc-heated wind tunnel is an important parameter for reproducing planetary entry and performing heating tests. However, its distribution is insufficiently clarified, owing to complicated phenomena, such as arc discharge and supersonic expansion. In this paper, the authors assess the enthalpy of an arc-heated flow in a large-scale facility based on measurements and computational results. The flow enthalpy of high-temperature gases, which comprised thermal, chemical, kinetic, and pressure components, was reconstructed based on the measured rotational temperature, heat flux, and impact pressure, in addition to the computational science approach. The rotational temperature of nitric oxide molecules was obtained using emission spectroscopic measurements of band spectra in the near-ultraviolet range. A numerical model was developed and validated based on measured data. The results indicated that the model efficiently reproduced the arc discharge behavior in the heating section and the thermochemical nonequilibrium in the expansion section. It was discovered that the dominant components of the arc-heated flow in the test section were the chemical and kinetic components. The flow enthalpy exhibited a nonuniform distribution in the radial direction. The authors conclude that the flow enthalpy of the core is approximately 28 MJ/kg at the nozzle exit.
Rights: © 2021 American Institute of Aeronautics and Astronautics
Type: article (author version)
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 高橋 裕介

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