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ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 2022, Vol. 43 ›› Issue (5): 125083-125083.doi: 10.7527/S1000-6893.2021.25083

• Fluid Mechanics and Flight Mechanics • Previous Articles     Next Articles

Sensitivity analysis of aerodynamic parameters of stratospheric tethered balloon

ZHANG Donghui1,2, ZHANG Taihua1, CUI Yanxiang1, CHEN Chen1, WANG Sheng1,2   

  1. 1. Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100194, China;
    2. University of Chinese Academy of Sciences, Beijing 100190, China
  • Received:2020-12-10 Revised:2021-01-08 Published:2021-02-02
  • Supported by:
    Strategic Priority Research Program of the Chinese Academy of Sciences (XDA20100200)

Abstract: A three-dimensional model is established for a stratospheric tethered balloon. The significance of parameter sensitivity analysis from the perspectives of system optimization design and flight test characteristics is discussed. The method of parameter sensitivity analysis from the two aspects is proposed and conducted for the tether normal aerodynamic coefficient, balloon resistance coefficient, and balloon lift coefficient. The analysis results show that reduction of the normal tether aerodynamic coefficient can significantly improve the maximum safety factor of the tether in the system optimization design, meanwhile reducing the tether tension and improving the wind-resistant capability of the system in the flight test. The balloon resistance coefficient and balloon lift coefficient do not improve the maximum safety factor of the tether in the design stage, while change in the parameters will affect the safety of the cable and wind-resistant capability in the flight test.

Key words: stratospheric tethered balloon, aerodynamic parameters, sensitivity analysis, optimal design, safety factor of tether

CLC Number: