Methods and apparatus for leak detection and mitigation for hydrogen fueled aircraft

At least one non-transitory computer readable medium comprising machine readable instructions which, when executed, cause programmable circuitry to:

• predict, based on an engine condition of an aircraft, a pressure and a temperature for a location within an undercowl of an engine of the aircraft;
• determine, using a first stored parameter relationship, a lower detonation limit of hydrogen at the location based on the temperature and the pressure;
• determine, using a second stored parameter relationship, a lower flammability limit of hydrogen at the location based on the temperature and the pressure;
• and
• conduct a mitigation action in a hydrogen fuel distribution system based on a predicted hydrogen concentration at the location at least one of (a) exceeding the lower detonation limit or (b) exceeding the lower flammability limit.

A method comprising:

• predicting, based on an engine condition of an aircraft, a pressure and a temperature for a location within an undercowl of an engine of the aircraft;
• determining, using a first stored parameter relationship, a lower detonation limit of hydrogen at the location based on the temperature and the pressure;
• determining, using a second stored parameter relationship, a lower flammability limit of hydrogen at the location based on the temperature and the pressure;
• and
• conducting a mitigation action in a hydrogen fuel distribution system of the aircraft based on a predicted hydrogen concentration at the location at least one of (a) exceeding the lower detonation limit or (b) exceeding the lower flammability limit.