Autonomous Cooling Design and Temperature Control Mechanism of Hypersonic Vehicle

Aiming at the thermal control problem of the key parts in hypersonic vehicle, an adsorption autonomous cooling device based on porous media was designed. The transient behavior of two-phase flow and heat transfer inside porous media was studied numerically and experimentally in this paper. The two-phase mixing model was used in the numerical method and verified by the visualization experiment. The results show that the heat transfer performance of adsorption autonomous cooling device was more significant under the hot-end exhaust design. It shows that the temperature of cold end was still within 100 °C at 1500 s. Moreover, the motion direction of the vapor phase was opposite to gravity, and the flow direction of the liquid phase was squeezed by the vapor phase and related to the outlet position. The liquid working fluid was more strongly bound by the pore structure. Furthermore, the liquid working medium was further vaporized near the interface after the formation of the two-phase mixing zone.