On the effects of optimal implementation of variable rotor speed and power management on hybrid-electric rotorcraft

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dc.contributor.authorSaias, Chana Anna
dc.contributor.authorGoulos, Ioannis
dc.contributor.authorPachidis, Vassilios
dc.contributor.authorBacic, Marko
dc.date.accessioned2023-02-09T15:20:23Z
dc.date.available2023-02-09T15:20:23Z
dc.date.issued2023-02-08
dc.description.abstractThe concept of Variable Rotor Speed (VRS) has been recognized as an efficient means to improve rotorcraft operational performance and environmental impact, with electrification being a potential technology to further contribute to that. This paper explores the impact of optimal implementation and scheduling of VRS and power management strategy for conventional and hybrid-electric rotorcraft on energy, fuel, and emissions footprint. A multidisciplinary simulation framework for rotorcraft performance combined with models for engine performance and gaseous emissions estimation is deployed. A holistic optimization approach is developed for the derivation of globally optimal schedules for combined rotor speed and power split targeting minimum energy consumption. Application of the derived optimal schedules at mission level resulted to a 6% improvement in range capability for the VRS tilt-rotor relative to its conventional counterpart. For the hybrid-electric tilt-rotor, combined optimization of VRS and power management leads to an increase in range to 18.4% at 40% and 25% reduced payload for current (250 Wh/kg) and future (450 Wh/kg) battery technology, respectively. For representative Urban Air Mobility (UAM) scenarios, it is demonstrated that the VRS concept resulted in up to 10% and 14% reductions in fuel burn and NOX relative to the nominal rotor speed case, respectively. The utilization of the combined optimum VRS and power split schedules can boost performance with reductions of the order of 20%and 25% in mission fuel/CO2 and NOX at a reduced payload relative to the conventional tilt-rotor.en_UK
dc.identifier.citationSaias CA, Goulos I, Pachidis V, Bacic M. (2023) On the effects of optimal implementation of variable rotor speed and power management on hybrid-electric rotorcraft. Journal of Engineering for Gas Turbines and Power, Volume 145, Issue 3, March 2023, Article number 031028, Paper number GTP-22-1245en_UK
dc.identifier.issn0742-4795
dc.identifier.urihttps://doi.org/10.1115/1.4056855
dc.identifier.urihttps://asmedigitalcollection.asme.org/gasturbinespower/article-abstract/145/3/031028/1156694/On-the-Effects-of-Optimal-Implementation-of
dc.identifier.urihttps://dspace.lib.cranfield.ac.uk/handle/1826/19165
dc.language.isoenen_UK
dc.publisherAmerican Society of Mechanical Engineersen_UK
dc.rightsAttribution 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/*
dc.subjecturban air mobilityen_UK
dc.subjecttilt-rotoren_UK
dc.subjecthybrid-electric propulsionen_UK
dc.subjectvariable rotor speeden_UK
dc.subjectoptimizationen_UK
dc.subjectsurrogate modelingen_UK
dc.subjectenergy-managementen_UK
dc.titleOn the effects of optimal implementation of variable rotor speed and power management on hybrid-electric rotorcraften_UK
dc.typeArticleen_UK

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