Crashworthiness analysis of a hydrogen-fuel hybrid blended-wing-body civil aircraft

Wing-body integration represents a significant future development direction for large civil passenger aircraft, offering superior aerodynamic performance and a more expansive carrying capacity. Hydrogen-powered aircraft, noted for their environmental benefits, also signify a crucial developmental path for future passenger aircraft. Traditional narrow-body passenger aircraft powered by hydrogen typically exhibit limited range. Moreover, integrating hydrogen power systems into blended-wing-body aircraft faces challenges related to the underutilization of space between the wings and the wing-body integration area. Against this backdrop, research was conducted on a hydrogen-fuel hybrid wing-body integrated civil aircraft designed to maximize the utilization of its internal space. A hydrogen-conventional fuel hybrid layout scheme for blended-wing-body (BWB) civil aircraft was proposed, significantly enhancing internal space utilization efficiency. A hydrogen-conventional fuel hybrid layout scheme for blended-wing-body (BWB) civil aircraft was proposed, significantly enhancing internal space utilization efficiency A crash dynamics analysis model of the hydrogen-fuel hybrid BWB300 aircraft was established, facilitating a systematic examination of the entire aircraft's structural dynamic response, energy management, crew acceleration response, and tank deformation. The survivable space retention rate (≥85%), overall energy change, and passenger seat acceleration response were employed to quantitatively compare the crashworthiness of the hydrogen-fuel hybrid and conventional fuel-only BWB aircraft. The findings from this study enable enhancing and assessing the structural crashworthiness of hydrogen-fuel hybrid BWB civil aircraft, and they also provide technical support and data references for the structural design of these aircraft.