Miguel Ángel Sáez Ortuño’s research while affiliated with Delft University of Technology and other places

... In that case, the focus was devoted to a narrow body configuration, where the fuselage was modified in order to include dorsal hydrogen lobe tanks by maintaining the original cabin size, without impacting too much the payload-range capability of the original platform, considering direct combustion of hydrogen. This strategy for generation of primary power on-board, responsible of thrust generation, is largely preferred for platforms that are larger than regional jets and commuters, as summarized in [19] and demonstrated by studies such as HyLiner 2.0 [20] and FlyZero MidSize [21], all of which feature pure hydrogen turbofan technologies. Typically, the different concepts are characterized by a conventional aircraft configuration, even if some changes are introduced to improve hydrogen storage within non-integral tanks (larger fuselage, blended shapes in fuselage-wing interface) usually positioned at the back of the plane or under the cabin floor. ...

Reference:

Preliminary Evaluation of Performance, Cost and Environmental Sustainability of a LH2‐Powered Narrow Body Aircraft