基于解析法的平流层飞艇上升段热力学特性分析

Thermodynamic Characteristic Analysis for Ascent Stratospheric Airship Using Analytical Method

综合考虑了太阳辐射、地面反照辐射和红外辐射等热环境因素,建立了平流层飞艇上升段热动力学模型。通过仿真计算,分析了当大气温度变化时,飞艇上升过程中压差、排气量及蒙皮温度等因素的变化情况。结果表明:大气温度降低时,可能会引起飞艇无法达到预期高度;大气温度升高时,会造成飞艇内部压强增大,对蒙皮的安全造成威胁。

A thermodynamic model was proposed for a stratospheric airship, which explicitly incorporates the thermal factors such as the solar radiation, earth albedo and infrared radiation. During the ascent process, the differential pressure, exhaust, and envelope temperature of the airship vary with the atmospheric temperature through numerical simulation. The results indicate that the airship may not reach the desired height if the atmospheric temperature decreases. Contrarily, the increase of the atmospheric temperature will lead to the increase of the inner pressure, threatening the safety of envelop.