Open AccessAerodynamic Analysis and Drag-reduction Design for Ultra-low-orbit Satellite
Author(s) -
Shao-ting Yu,
Caizhi Fan
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/887/1/012013
Subject(s) - drag , drag coefficient , aerodynamics , satellite , aerodynamic drag , aerospace engineering , parasitic drag , orbit (dynamics) , reduction (mathematics) , physics , orbital decay , drag divergence mach number , engineering , mathematics , geometry
When the satellite is operating at an orbital height of 120-300km, aerodynamic drag becomes the most important factor affecting ultra-low orbital attenuation and attitude disturbance. Based on the theory of free-molecular flow, the model of aerodynamic drag of a panel in free-molecular flow is established firstly, and then the influence of the angle of attack, adaptation coefficient, and the molecular velocity ratio on the drag coefficient of the panel is analysed. Finally, A reduced drag design method for a ultra-low-orbit satellite is proposed based on the analysis results. And it is validated by the simulation results. The approaches presented in this paper can be applied to aerodynamic design and calculation of ultra-low-orbit satellites.