ドライアイス推進剤供給システムの真空環境下における運用実証

令和4年度宇宙輸送シンポジウム（2023年1月12日-13日. 宇宙航空研究開発機構宇宙科学研究所（JAXA)(ISAS)) , 相模原市, 神奈川県

Space Transportation Symposium FY2022 (January 12-13, 2023. Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA)(ISAS)), Sagamihara, Kanagawa Japan

Dry ice is proposed as an alternative to xenon, which is currently widely used as a propellant for electric propulsion, due to its overwhelmingly lower price. Furthermore, by storing CO2 in a triple point, it can be stored at low pressure and supplied to the propellant at a constant flow rate. A mathematical model has been developed to determine the phase characteristics in the tank, which are determined by the heat input to the tank and the propellant flow rate. In the mathematical model, the liquid phase decreases with propellant supply during on-orbit operation, and the triple point is finished. Therefore, an experiment was conducted in which the tank was placed in a vacuum and the propellant was discharged to compare with the mathematical model. In the experiment, when the propellant was discharged more than 147 sccm at 2W heat input, the pressure dropped along the vapor-liquid equilibrium line. In the mathematical model, the liquid phase decreases when discharging more than 110 sccm at 2W heat input, and this comparison shows that there is a difference of about 28% from the experimental value.

所属の誤記: The University of Nagoya

資料番号: SA6000184055

STEP-2022-003