Journal of Shanghai Jiao Tong University

Journal of Shanghai Jiaotong University >

2022 , Vol. 56 >Issue 8: 1089 - 1100

DOI: https://doi.org/10.16183/j.cnki.jsjtu.2021.014

Aeronautics and Astronautics

Aerodynamic Drag Characteristics of Ultra-Low Orbit Satellites

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  • 1. School of Aeronautics and Astronautics, Shanghai Jiao Tong University, Shanghai 200240, China
    2. Innovation Academy for Microsatellites of Chinese Academy of Sciences, Shanghai 201203, China

Received date: 2021-01-09

  Online published: 2022-08-26

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Abstract

Taking the 180~300 km ultra-low orbit satellite as the research object, the aerodynamic drag characteristics of the typical shapes were studied by using the direct simulation Monte Carlo (DSMC) method in the free molecular flow simulation method, which can accurately simulate the three-dimensional complex shapes. By comparing the theoretical drag coefficients of spheres and plates at different velocity rates and the aerodynamic experimental data of 70° bluff body shapes at different velocity rates with the DSMC calculation results, the adaptability of the three-dimensional DSMC method to shape and mesh is verified. The drag characteristics of several typical satellite shapes were calculated and compared, and the pressure difference drag, shear drag, total drag and dimensionless drag coefficients with altitude and shape were obtained. The optimized design of the shape of the ultra-low orbit satellite can reduce the drag by about 10%, which can effectively improve its on-orbit operation characteristics and reduce the design requirements of the own related systems of the satellite.

Key words： ultra-low orbit; satellite; aerodynamic drag; direct simulation Monte Carlo (DSMC); 70° blunt cone

Cite this article

WANG Xiaoliang, YAO Xiaosong, GAO Shuang, LIU Guohua . Aerodynamic Drag Characteristics of Ultra-Low Orbit Satellites[J]. Journal of Shanghai Jiaotong University, 2022 , 56(8) : 1089 -1100 . DOI: 10.16183/j.cnki.jsjtu.2021.014

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