Effects of solar panels on Aerodynamics of a small satellite with deployable aero-brake

• Published in: Acta astronautica 2018-10, Vol.151, p.456-466
• Main Authors: Mungiguerra, S., Zuppardi, G., Spanò Cuomo, L., Savino, R.
• Format: Article
• Language: English
• Subjects: Aerobraking; Aerodynamic drag; Aerodynamics; Angle of attack; Deployable aero-brake; Direct simulation Monte Carlo method; Drag; Longitudinal stability; Monte Carlo simulation; Orbital maneuvers; Satellites; Small satellite aerodynamics; Small satellites; Solar energy; Solar panels
• ISSN: 0094-5765; 1879-2030
• DOI: 10.1016/j.actaastro.2018.06.040

This work is focused on the aerodynamic analysis of a small satellite provided with a deployable aero-brake. The satellite is intended to perform a completely aerodynamic de-orbiting maneuver from Low-Earth-Orbit. A brief discussion about the aerodynamic effects of the position of the aero-brake along the longitudinal axis of a simplified axisymmetric system is presented. Moreover, a more complex architecture, envisaging deployable solar panels for the enhancement of power generation along the orbital path, is proposed and analyzed. The present paper is aimed at the evaluation of the influence of such a configuration on the satellite aerodynamic parameters. Computations have been carried out by means of a Direct Simulation Monte Carlo (DSMC) code at altitude of 150 km, velocity of 7800 m/s and in the interval of angle of attack 0–180 deg with a spacing of 10 deg. The results verified that the deployable solar panels strongly influence Aerodynamics of the satellite. One of the most relevant aspects is the variation of the longitudinal stability equilibrium that becomes more stable. Furthermore, the deployable solar panels increase the aerodynamic drag when the aero-brake is closed, affecting the drag modulation capability. •DSMC Aerodynamic analyses performed for small satellite with deployable aero-brake.•Influence of gas-surface interaction model is not very strong.•Aero-brake in middle position favors longitudinal stability.•Configuration with deployable solar panels is more stable than that without panels.•Solar panels increase aerodynamic drag, limiting drag modulation capability.