Speaker
Description
Liquid hydrogen (LH2) aircraft developments are highly dependent on the hydrogen tankage as well as the insulation system requirements. Recently, Georgia Tech investigators, as part of a NASA preliminary evaluation activity, have been developing a single-aisle LH2 passenger jet to better understand the sensitivities that hydrogen puts onto the aircraft as a system. As a part of the activity, NASA and Georgia Tech developed the ability to integrate a tank set into the aircraft including insulation systems. Several key observations were made on the insulation system requirements that were driven by the observation of the system-level operations. Aircraft were evaluated with the assumption of constant tank pressure control. Assessments were made on several insulation system options to avoid venting of hydrogen during nominal and worst-case hot-day flights. Additional evaluations were performed based on ground profiles. The insulation solutions were then implemented in the Georgia Tech flight simulation software and simulations of the aircraft missions were performed verifying that minimal venting of the aircraft occurred pre-takeoff with no venting during flight.
