航空用燃料电池及混合电推进系统发展综述

With the increasing demand of carbon emission reduction and the development of long endurance aircraft in the world，the high efficiency fuel cell aviation electric propulsion system has been paid more and more attention，and the concept of hydrogen aviation is well known. The high temperature fuel cell which can use hydrocarbon fuel can also form a hybrid power system with gas turbine，and the power generation efficiency can be further improved to 70%. Firstly，this paper reviews the application of fuel cell and fuel cell turbine hybrid system in aviation energy and power system. Then，several new concepts of hybrid electric propulsion systems are summarized，such as power generation and propulsion integrated fuel cell turbine hybrid power system and non turbine fuel cell hybrid propulsion system. Based on this，this paper analyzes the key technical problems that limit the practical application of the fuel cell hybrid system，mainly reflected in the low power to weight ratio of the hybrid system and not achieved a breakthrough of the macromolecular hydrocarbon fuel reforming technology.