Thermal Protection Scheme And Effect Analysis Of Heat Storage High Speed Aircraft Cabin

In solving the development of hypersonic flight vehicle to a higher Mach number module thermal protection problem,not only confined to the state of thermal control,need throughout the aircraft took off from the ground to the landing and parking on the ground of the entire process,fine considering thermal environment in and out of the vehicle whole each heat,in meet the demand of tank shell heat protection at the same time,It can also achieve a greater degree of multistage use of heat.Phase change materials have the advantage of large heat sink,high energy storage density,based on high speed flight vehicle module thermal protection problems,starting from thermal storage ideas,through the use of different types of phase change materials,from different parts of the design is suitable for the module type thermal protection scheme for storing heat,finally thermal protection performance of each method in the analysis of the concrete.In this paper,the thermal protection scheme of flexible storage tank body based on phase change microcapsule was proposed to solve the problems of temperature rise and electronic device damage caused by long-term exposure when high-speed aircraft is parking on the ground for a long time,and the research method combining experimental research and numerical calculation was adopted.It is verified that the phase change microcapsule flexible storage belt has a significant effect on reducing the temperature of the oil tank and the cabin wall.Then,aiming at the thermal protection problem of the cabin wall of high-speed aircraft,based on the consideration of heat flow collection and reuse of the cabin wall of high-speed aircraft,a wall thermal protection layer structure using solid-gas phase change medium as thermal protection material was designed.The decomposition rate,heat sink and decomposition pressure of four kinds of solid-gas phase change materials selected in this program were measured through experiments,and the key thermodynamic parameters of these four kinds of phase change materials were obtained,which provided basic data for the further study of this program in the future.Finally,an active thermal protection scheme based on liquid-gas phase change energy storage materials was proposed to solve the problem of active thermal protection of fuel-free cabin.Through the simulation comparison of phase change scheme of air injection,boiling convection scheme of micro-channel radiator and spray cooling scheme,it was concluded that the spray cooling scheme was more suitable for the fuel-free cabin.After according to the passive thermal protection scheme and the simulating calculation result of the spray cooling scheme,compared the two kinds of solution under the quality system,the results showed that the quality from the initial system,spray cooling solutions is not superior to passive thermal protection,but considering the quality of the spray cooling medium consumption and cooling effect,the scheme is compared with the passive thermal protection scheme still has some technical advantages.