Transient thermal response of spherical aerostats in rising process

In this paper, thermal models for stratospheric aerostats were established. Transient thermal response of a spherical aerostat in rising process was studied based on this model. In the model, the following radiative heat fluxes on the external hull were considered: the direct solar radiation, the diffuse solar radiation, the reflected solar radiation, the infrared radiation of the earth and that of the atmosphere. In addition, the model included the convective heat transfer inside and outside the aerostat. By numerical simulation, transient thermal response of the spherical aerostat in rising process was presented. The results show that the hull temperature distribution of spherical aerostats is non-uniform and varies with time complexly.