低压储能的升浮一体飞行器总体参数研究

升浮一体飞行器是一种综合了太阳能无人机和平流层飞艇特点的新型临近空间飞行器，是航空航天领域研究的热点，可再生燃料电池是升浮一体飞行器最有发展前景的储能装置。针对现有燃料电池中氢气和氧气存储方式的缺陷，充分利用升浮一体飞行器巨大的机身体积，提出了采用低压气囊储气的燃料电池方案，建立了升浮一体飞行器总体参数计算模型，提出常规燃料电池和气囊储气燃料电池的理论计算方法。研究了不同储气方式对升浮一体飞行器的能源系统以及飞行器总体参数的影响。研究表明，采用低压储气方法后，氢气的质量储气密度可提高至13.0%，燃料电池存储能量为1 489.7 kWh条件下，能量密度可达到1 000 Wh/kg以上，对减小升浮一体飞行器总重和外形尺寸、提高飞行器载荷能力有显著作用。

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

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.