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de Vries, R. (author), Wolleswinkel, Rob E. (author), Hoogreef, M.F.M. (author), Vos, Roelof (author)Battery-electric aviation is commonly believed to be limited to small aircraft and is therefore expected have a negligible impact on the decarbonization of the aviation sector. In this paper we argue that, with the correct choice of design parameters and top-level aircraft requirements, the addressable market is actually substantial. To...conference paper 2024
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Wolleswinkel, Rob E. (author), de Vries, R. (author), Hoogreef, M.F.M. (author), Vos, Roelof (author)Thus far, battery-electric propulsion has not been considered a promising pathway to climate-neutral aviation. Given current and expected battery technology, in most literature battery electric aircraft are only considered feasible for short ranges (< 400 km) and small payloads (< 19 pax). As a result, battery-electric aircraft...conference paper 2024
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Heidebrecht, A. (author), Burger, K.W. (author), Hoogreef, M.F.M. (author), Vos, Roelof (author), Isikveren, Askin T. (author), Gangoli Rao, A. (author)The concept of an "Auxiliary Power and Propulsion Unit" (APPU) is introduced, which consists of a Boundarylayer ingesting (BLI) propulsor with an engine mounted at the rear of an passenger aircraft fuselage, replacing the Auxiliary Power Unit (APU) and contributing around 10% of total cruise thrust, as well as auxiliary power. This APPU unit is...conference paper 2022
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de Vries, R. (author), Hoogreef, M.F.M. (author), Vos, Roelof (author)There has been a surge in research related to hybrid-/ electric propulsion (HEP) over the past decade, since this technology has the potential to reduce the energy consumption and in-flight emissions of commercial aircraft and, therefore, to bring the aviation sector closer to the sustainability targets established by the European Commission [1]...journal article 2020
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Hoogreef, M.F.M. (author), de Vries, R. (author), Sinnige, T. (author), Vos, Roelof (author)This paper presents a synthesis of aero-propulsive interaction studies performed at Delft University of Technology, applied to conceptual aircraft designs with distributed hybrid-electric propulsion (DHEP). The studied aero-propulsive interactions include tip-mounted propulsion, wing leading-edge distributed propulsion and boundary-layer...conference paper 2020
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de Vries, R. (author), Hoogreef, M.F.M. (author), Vos, Roelof (author)In this paper a design-of-experiments is performed with the objective of determining the improvements in aeropropulsive efficiency required for a reduction in the energy consumption of turboelectric transport aircraft, when compared to conventional, gas-turbine based alternatives. Simplified representations of the powertrain and the...conference paper 2020
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Schouten, T.J.E. (author), Hoogreef, M.F.M. (author), Vos, Roelof (author)Four regional turboprop aircraft of different configuration are assessed on their key performance indicators by using an automated conceptual design method. The configurations include two wing-mounted propeller installations (high-wing and low-wing) as well as a fuselagemounted configuration and a tail-mounted configuration. The effect of the...conference paper 2019
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Hoogreef, M.F.M. (author), Vos, Roelof (author), de Vries, R. (author), Veldhuis, L.L.M. (author)This paper presents the results of a study into the effect of distributed hybrid-electric propulsion on aircraft performance and characteristics. To size these aircraft, a new preliminary sizing method for hybrid-electric aircraft with distributed propulsion, including aero-propulsive interaction, is combined with a modified Class-II weight...conference paper 2019
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de Vries, R. (author), Hoogreef, M.F.M. (author), Vos, Roelof (author)This study compares a hybrid-electric aircraft featuring a propulsive empennage and over-the- wing, distributed-propulsion to a conventional regional turboprop. The impact of multiple design parameters, mission requirements, and technology assumptions on maximum take-off mass and payload-range energy efficiency is evaluated, in order to...conference paper 2019
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Vos, Roelof (author), Hoogreef, M.F.M. (author)Three regional transport aircraft of different configuration are synthesized for the same design specification using an automated design routine. The first aircraft features wing-mounted propellers, the second aircraft features propellers mounted on the horizontal tail plane, while the last configuration replaces the horizontal and vertical tail...conference paper 2018
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Vos, R. (author), Hoogreef, M.F.M. (author)This paper presents a semi-analytical method for the weight estimation of fuselages with an oval cross-section, applied to blended wing body aircraft. The weight estimation of the fuselage primary structure is based on a structural analysis of two-dimensional crosssections and it is completed by a set of empirical relations for the weight...conference paper 2013
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Vos, R. (author), Geuskens, F.J.J.M.M. (author), Hoogreef, M.F.M. (author)This paper outlines a new concept for a pressure cabin design for blended-wing-body aircraft. An overview is presented of the wide oval cabin and why it is believed to be a possible alternative to existing designs of non-circular pressurized cabins. The perimeter of the oval cross section is formed by four smoothly connecting arcs of different...conference paper 2012