Fuel tank inerting system and aircraft

The utility model relates to a fuel tank inerting system and an aircraft. On one hand, the low-temperature rare gas generated by gasification of the liquid rare gas is directly used for replacing oxygen and fuel steam in the fuel tank and reducing the temperature in the fuel tank, and on the other hand, the low-temperature rare gas is used for cooling the fuel steam discharged out of the fuel tank; and then the cooled fuel steam or the fuel liquid drops formed by condensation are returned to the fuel tank to further reduce the temperature in the fuel tank and the concentration of the fuel steam, so that double inerting of the fuel tank is realized. The fuel tank inerting system according to the present disclosure may be applicable to various types of aircrafts. 本公开涉及燃料箱惰化系统及飞行器。本公开一方面直接利用液态稀有气体气化产生的低温稀有气体置换燃料箱中的氧气和燃料蒸汽并降低燃料箱内的温度，另一方面利用低温稀有气体对排出燃料箱的燃料蒸汽进行冷却，再将冷却后的燃料蒸汽或冷凝形成的燃料液滴返回燃料箱以进一步降低燃料箱内的温度及燃料蒸汽浓度，从而实现了对燃料箱的双重惰化。根据本公开的燃料箱惰化系统可适用于各种类型的飞行器。