COMBUSTOR SIZE RATING FOR A GAS TURBINE ENGINE USING HYDROGEN FUEL

A gas turbine engine (100; 200; 300) includes a hydrogen fuel delivery assembly (202) configured to deliver a hydrogen fuel flow, a compressor section (110, 112) configured to compress air flowing therethrough to provide a compressed air flow, and a combustor (150; 401; 403; 405; 407; 409) including a combustion chamber (430) having a burner length and a burner dome height. The combustion chamber (430) is configured to combust a mixture of the hydrogen fuel flow and the compressed air flow. The combustion chamber (430) is characterized by a combustor size rating between one inch and seven inches.