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ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 2021, Vol. 42 ›› Issue (7): 224438-224438.doi: 10.7527/S1000-6893.2020.24438

• Solid Mechanics and Vehicle Conceptual Design • Previous Articles     Next Articles

Parametric study on buoyancy-lifting aerial vehicle with low pressure energy storage method

LI Guanxiong1, WANG Jingyu1, WANG Yuntao2   

  1. 1. School of Aeronautics and Astronautics, Sichuan University, Chengdu 610065, China;
    2. National Key Laboratory of Fundamental Science on Synthetic Vision, Sichuan University, Chengdu 610065, China
  • Received:2020-06-19 Revised:2020-07-24 Published:2020-09-14
  • Supported by:
    Sichuan Science and Techonology Program (2020YJ0019); Sichuan Major Science and Technology Program (2019YFG0382); Sichuan Science and Technology Program (2019YJ0294)

Abstract: The buoyancy-lifting aerial vehicle, a novel near-space aircraft with characteristics of both the solar aircraft and the stratospheric airship, has become a research hotspot in the field of aeronautics and astronautics. The regenerative fuel cell is the most promising energy storage device for the buoyancy-lifting aerial vehicle. Aiming at the defects of the hydrogen and oxygen storage method of existing fuel cells, we propose a scheme of fuel cells with low pressure gasbags, fully utilizing the huge fuselage volume of the buoyancy-lifting aerial vehicle. The calculation model of the general parameters of the vehicle is established, and the theoretical calculation methods for conventional fuel cells and the fuel cells with gasbags are proposed. Effects of the energy storage methods on the energy system and the general parameters of the aircraft are studied. Results show that the low pressure energy storage method can increase the mass storage density of the hydrogen to 13.0%; when the stored energy of the fuel cell is 1 489.7 kWh, the specific energy can reach more than 1 000 Wh/kg, leading to significant reduction in the total weight and the overall dimension of the buoyancy-lifting aerial vehicle and improvement in the load capacity of the vehicle.

Key words: near-space, buoyancy-lifting aerial vehicles, low pressure energy storage, fuel cells, general parameters

CLC Number: