Airworthiness Design and Verification Analysis of Unconventional Thermodynamic Cycle Hydrogen Aero-Turbine Engines

Hydrogen fuel is an extremely ideal aviation power with its characteristics of high power density and zero carbon emission. Hydrogen fuel is stored in a low-temperature liquid state in aircraft, and the liquid hydrogen needs to be warmed up to hydrogen gas by heat transfer before entering the combustion chamber to participate in combustion. Since liquid hydrogen has the traits of low temperature and high specific heat capacity, large amount of heat is required to complete the heat transfer process. And the engine thermal cycle process can be fully utilized for heat transfer of liquid hydrogen. This paper presents the design and verification of unconventional thermal cycle system based on an unconventional thermal cycle configuration for hydrogen aero-turbine engines under the existing airworthiness regulations. This paper can provide support for the airworthiness design and verification of hydrogen aero-turbine engines with unconventional thermal cycle configurations, and provide a reference for the introduction of the airworthiness validation special conditions policy applicable to hydrogen aero-turbine engines.