SW
S.G. Wulffraat
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2 records found
1
Distributed electric propulsion (DEP) modifies the spanwise lift distribution through propeller slipstream interaction, directly affecting wing-root bending loads and structural sizing. This paper extends a mid-fidelity aero-propulsive–structural framework to evaluate wing structural sensitivity for distributed-propulsion hybrid-electric regional aircraft with multiple propellers at arbitrary spanwise locations. Blade pitch trimming under non-uniform inflow is incorporated to obtain physically consistent slipstream velocities, and a three-dimensional numerical vortex-image correction replaces the previously used analytical jet correction to remove geometric constraints and enable flexible propulsion layouts. The objective is to quantify which propulsion-integration parameters govern wing structural mass and to assess whether clean-wing structural sizing assumptions remain valid for DEP configurations. The framework is applied to a representative 70-passenger hybrid-electric regional aircraft under cruise and 2.5𝑔 pull-up conditions. Results show that wing mass is governed primarily by spanwise load redistribution and associated bending-moment arm effects. Parameters that shift lift outboard are structurally penalising, while inboard redistribution reduces mass. Propeller rotational direction and thrust-share allocation emerge as first-order drivers, producing mass variations up to ∼ 3%, whereas swirl magnitude, spanwise translation, and disk-area changes are secondary within the investigated design space. Clean-wing aerodynamic loads are therefore not universally conservative and can underpredict structural mass depending on thrust distribution and propulsor placement. These findings demonstrate that propulsion-integration decisions must be evaluated jointly with structural sizing in conceptual DEP aircraft design
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Distributed electric propulsion (DEP) modifies the spanwise lift distribution through propeller slipstream interaction, directly affecting wing-root bending loads and structural sizing. This paper extends a mid-fidelity aero-propulsive–structural framework to evaluate wing structural sensitivity for distributed-propulsion hybrid-electric regional aircraft with multiple propellers at arbitrary spanwise locations. Blade pitch trimming under non-uniform inflow is incorporated to obtain physically consistent slipstream velocities, and a three-dimensional numerical vortex-image correction replaces the previously used analytical jet correction to remove geometric constraints and enable flexible propulsion layouts. The objective is to quantify which propulsion-integration parameters govern wing structural mass and to assess whether clean-wing structural sizing assumptions remain valid for DEP configurations. The framework is applied to a representative 70-passenger hybrid-electric regional aircraft under cruise and 2.5𝑔 pull-up conditions. Results show that wing mass is governed primarily by spanwise load redistribution and associated bending-moment arm effects. Parameters that shift lift outboard are structurally penalising, while inboard redistribution reduces mass. Propeller rotational direction and thrust-share allocation emerge as first-order drivers, producing mass variations up to ∼ 3%, whereas swirl magnitude, spanwise translation, and disk-area changes are secondary within the investigated design space. Clean-wing aerodynamic loads are therefore not universally conservative and can underpredict structural mass depending on thrust distribution and propulsor placement. These findings demonstrate that propulsion-integration decisions must be evaluated jointly with structural sizing in conceptual DEP aircraft design
Electric island H2opper
A hydrogen powered electrical aircraft
Bachelor thesis
(2021)
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A.L.G. Cummins, C. Dolman, T.A. Gehlen, T.J.W. Koning, W.A. Mathoera, H.R.A.M. Spaan, D.I. Timmermans, Dick Daniel Vlot, O. van Voorst, S.G. Wulffraat, J.A. Pascoe, J. Lee
Aviation is a vital lifeline for island communities. However, air travel is also a significant source of air pollution and therefore contributes to global warming. The rising sea levels, caused by global warming, heavily affect the livability of pacific islands, causing drink water shortages and crop failure. Sustainable aviation has to be a part of the climate change solution.
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Aviation is a vital lifeline for island communities. However, air travel is also a significant source of air pollution and therefore contributes to global warming. The rising sea levels, caused by global warming, heavily affect the livability of pacific islands, causing drink water shortages and crop failure. Sustainable aviation has to be a part of the climate change solution.