Search

Your search keyword '"IMOTHEP"' showing total 35 results
Start Over Descriptor "IMOTHEP"
35 results on '"IMOTHEP"'

1. Study of a Regional Turboprop Aircraft with Electrically Assisted Turboshaft.

Author

Habermann, Anaïs Luisa, Kolb, Moritz Georg, Maas, Philipp, Kellermann, Hagen, Rischmüller, Carsten, Peter, Fabian, and Seitz, Arne

Subjects
TURBOPROP airplanes, COMMERCIAL aeronautics, AIRCRAFT fuels, REDUCTION potential, REGIONAL airlines, ELECTRICAL energy
Abstract

Hybrid-Electric Propulsion (HEP) could be part of the solution to decrease emissions associated with regional commercial aviation. This study presents results for the aircraft level fuel reduction potential of a regional turboprop concept with an HEP architecture and Entry-Into-Service (EIS) in 2035+. The configuration specifically tackles the elaborated challenges of introducing an additional electrical energy source to the configuration by employing a twofold electrical assistance to a turboshaft engine in combination with an innovative thermal management concept. Relevant components and disciplines were modeled and incorporated into an integrated aircraft design environment. The behavior and interaction of the HEP architecture with the aircraft was thoroughly investigated. A best-performing configuration was derived and compared with a conventional reference configuration following a State-of-the-Art (SoA) reference aircraft approach. For a typical mission with 200 nmi range, a block fuel reduction of 9.6% was found. However, the assumed battery performance characteristics limited the reduction potential and led to a fuel burn increase for the 600 nmi design mission. Furthermore, sourcing the non-propulsive subsystems directly from the on-board battery was detrimental. The innovative Thermal Management System (TMS) located in the propeller slipstream showed a synergistic effect with the investigated configuration. [ABSTRACT FROM AUTHOR]

Published
2023
Full Text
View/download PDF

2. Aerodynamic Effects of a Wing Surface Heat Exchanger.

Author

Habermann, Anaïs Luisa, Khot, Ankit, Lampl, David Emanuel, and Perren, Christof

Subjects
HEAT exchangers, HEAT transfer coefficient, TURBOPROP airplanes, HYBRID electric airplanes, HEAT transfer, FORCED convection, TURBULENT boundary layer, WING-warping (Aerodynamics)
Abstract

One challenge for the design and analysis of hybrid electric aircraft configurations is an increased demand in the rejection of excess waste heat. A wing surface heat exchanger concept, which is explored as part of the IMOTHEP project, foresees transferring heat from the propulsive electrical components to the wing surface of the aircraft. Here, heat is mainly dissipated and transported by forced convection. The present study focuses on the analysis of the impact of heat rejection via the wing surface on the wing's heat transfer and aerodynamic efficiency characteristics. For this purpose, RANS CFD studies of 2D airfoils and a 3D wing propeller geometry of a regional turboprop configuration in representative flight conditions (take off, cruise, and taxi in) are carried out. For each condition, the influence of defining parameters, such as altitude, freestream velocity, angle of attack, surface temperature, and propeller thrust is explored. It is shown that, when increasing the wing surface temperature compared against the freestream temperature, the aerodynamic efficiency of the wing deteriorates for all flight conditions. In reference cruise conditions for example, the lift-to-drag ratio decreases by 4%, while the average heat transfer coefficient is reduced by almost 20% when increasing the surface temperature by 300 K. Furthermore, the propeller slipstream enhances the wing's heat transfer capacity significantly. [ABSTRACT FROM AUTHOR]

Published
2023
Full Text
View/download PDF

3. Modelling and Design Guidelines for Ram Air Ducts Using the Meredith Effect: Applied to an Organic Rankine Cycle Waste Heat Recovery System

Author

van Dongen, Jasper (author) and van Dongen, Jasper (author)

Abstract

With climate change posing increasing risks, the Advisory Council for Aviation Research and Innovation in Europe (ACARE) aims to reduce CO2 emissions by 75% and NOx emissions by 90% per passenger kilometer by 2050, compared to a baseline aircraft from 2000. The ARENA project addresses this by developing a waste heat recovery system using aircraft engine exhaust gases, improving fuel efficiency. This thesis focuses on integrating the condenser of such a system into the propulsion unit, aiming to minimize drag from the ram air cooling duct by evaluating different heat exchanger topologies and duct designs. The study uses the IMOTHEP Distributed fans Research Aircraft with electric Generators by ONERA (DRAGON) concept, a hybrid electric aircraft with two tail-mounted turbogenerators. The research proceeds in several stages. Initially, a multipass-condenser's potential to reduce pressure drop was examined by adjusting the heat exchanger blockage factor per pass, but results showed no reduction in pressure drop. Next, a lumped parameter model was developed to analyze drag, pressure drop, temperature increase, and ram air duct length. This model evaluated the sensitivity of duct geometrical parameters on the drag recovery factor—a dimensionless number indicating net thrust. Findings revealed that inclining the heat exchanger efficiently increases the drag recovery factor, while the diffuser area ratio has a similar effect but is less space-efficient. The mass flow rate ratio showed less sensitivity, and fin height or pitch had the smallest effect on drag recovery. Using the lumped parameter model, an optimal preliminary ram air duct design was identified for different spatial constraints. The study found that inline plain tube bundle and flat tube offset strip fin heat exchangers provided more compact solutions with higher drag recovery factors. For large diffuser-blocked area fractions, optimal duct geometry remained independent of heat exchang, ARENA, Aerospace Engineering

Published
2024

4. Aerodynamic Effects of a Wing Surface Heat Exchanger

Author

Anaïs Luisa Habermann, Ankit Khot, David Emanuel Lampl, and Christof Perren

Subjects
wing surface heat exchanger, computational fluid dynamics, heated boundary layer, turbulent boundary layer, hybrid electric aircraft, IMOTHEP, Motor vehicles. Aeronautics. Astronautics, TL1-4050
Abstract

One challenge for the design and analysis of hybrid electric aircraft configurations is an increased demand in the rejection of excess waste heat. A wing surface heat exchanger concept, which is explored as part of the IMOTHEP project, foresees transferring heat from the propulsive electrical components to the wing surface of the aircraft. Here, heat is mainly dissipated and transported by forced convection. The present study focuses on the analysis of the impact of heat rejection via the wing surface on the wing’s heat transfer and aerodynamic efficiency characteristics. For this purpose, RANS CFD studies of 2D airfoils and a 3D wing propeller geometry of a regional turboprop configuration in representative flight conditions (take off, cruise, and taxi in) are carried out. For each condition, the influence of defining parameters, such as altitude, freestream velocity, angle of attack, surface temperature, and propeller thrust is explored. It is shown that, when increasing the wing surface temperature compared against the freestream temperature, the aerodynamic efficiency of the wing deteriorates for all flight conditions. In reference cruise conditions for example, the lift-to-drag ratio decreases by 4%, while the average heat transfer coefficient is reduced by almost 20% when increasing the surface temperature by 300 K. Furthermore, the propeller slipstream enhances the wing’s heat transfer capacity significantly.

Published
2023
Full Text
View/download PDF

5. Study of a Regional Turboprop Aircraft with Electrically Assisted Turboshaft

Author

Seitz, Anaïs Luisa Habermann, Moritz Georg Kolb, Philipp Maas, Hagen Kellermann, Carsten Rischmüller, Fabian Peter, and Arne

Subjects
regional aircraft, (conceptual) aircraft design, hybrid-electric propulsion, parallel-hybrid propulsion, cycle-integrated parallel hybrid, mechanically integrated parallel hybrid, hybridization strategy, thermal management system, IMOTHEP
Abstract

Hybrid-Electric Propulsion (HEP) could be part of the solution to decrease emissions associated with regional commercial aviation. This study presents results for the aircraft level fuel reduction potential of a regional turboprop concept with an HEP architecture and Entry-Into-Service (EIS) in 2035+. The configuration specifically tackles the elaborated challenges of introducing an additional electrical energy source to the configuration by employing a twofold electrical assistance to a turboshaft engine in combination with an innovative thermal management concept. Relevant components and disciplines were modeled and incorporated into an integrated aircraft design environment. The behavior and interaction of the HEP architecture with the aircraft was thoroughly investigated. A best-performing configuration was derived and compared with a conventional reference configuration following a State-of-the-Art (SoA) reference aircraft approach. For a typical mission with 200 nmi range, a block fuel reduction of 9.6% was found. However, the assumed battery performance characteristics limited the reduction potential and led to a fuel burn increase for the 600 nmi design mission. Furthermore, sourcing the non-propulsive subsystems directly from the on-board battery was detrimental. The innovative Thermal Management System (TMS) located in the propeller slipstream showed a synergistic effect with the investigated configuration.

Published
2023
Full Text
View/download PDF

7. Aerodynamic Investigation of the High-Lift Performance of a Propeller-Driven Regional Transport Aircraft with Distributed Propulsion

Author

Keller Denis

Subjects
electric aircraft, climate change, hybrid electric propulsion, green aviation, H2020 Transport, IMOTHEP
Abstract

Presentation at the12th EASN International Conference on “Innovation in aviation & space for opening new horizons", 18-21 Oct 2022, Barcelona, Spain, https://easnconference.eu/

Published
2022
Full Text
View/download PDF

9. Study of a Regional Turboprop Aircraft with Hybrid Electric Turboshaft Assistance

Author

Habermann, Anaïs, Peter, Fabian, Maas, Philipp, Kolb, Moritz, Rischmüller, Carsten, Kellermann, Hagen, and Seitz, Arne

Subjects
climate change, hybrid electric propulsion, green aviation, regional aircraft, H2020 Transport, CINEA, hybrid electric aircraft, IMOTHEP
Abstract

Presentation at the12th EASN International Conference on “Innovation in aviation & space for opening new horizons", 18-21 Oct 2022, Barcelona, Spain, https://easnconference.eu/

Published
2022
Full Text
View/download PDF

11. Performance investigations of a cycle- & mechanically-integrated parallel hybrid-electric turboshaft

Author

Maas, Philipp, Seitz, Arne, Wirth, Dominik, Geiger, Peter, and Hornung, Mirko

Subjects
climate change, hybrid electric propulsion, green aviation, H2020 Transport, CINEA, hybrid electric aircraft, IMOTHEP
Abstract

Presentation at the12th EASN International Conference on “Innovation in aviation & space for opening new horizons", 18-21 Oct 2022, Barcelona, Spain, https://easnconference.eu/

Published
2022
Full Text
View/download PDF

12. IMOTHEP: Towards a roadmap for the development of HEP

Author

Novelli, Philippe

Subjects
climate change, hybrid electric propulsion, green aviation, H2020 Transport, CINEA, hybrid electric aircraft, IMOTHEP
Abstract

Presentation at the12th EASN International Conference on “Innovation in aviation & space for opening new horizons", 18-21 Oct 2022, Barcelona, Spain, https://easnconference.eu/

Published
2022
Full Text
View/download PDF

15. Noise radiation by eight wingspan distributed propellers

Author

Guérin, Sébastien and Tormen, Damiano

Subjects
electric aircraft, climate change, hybrid electric propulsion, H2020, green aviation, H2020 Transport, IMOTHEP
Abstract

Presentation at theDLRK2022 - Deutscher Luft- und Raumfahrtkongress, 27-29/9/2022, Dresden, Germany.

Published
2022
Full Text
View/download PDF

16. IMOTHEP: designing hybrid electric propulsion concepts

Author

Novelli, Philippe, Defoort, Sebastien, Lefèbvre, T, and Nguyen Van, Eric

Subjects
hybrid electric propulsion, H2020, green aviation, H2020 Transport, CINEA, hybrid electric aircraft, IMOTHEP
Abstract

Presentation at ONERA-DLR-IRT AESE European workshop on multidisciplinary optimization, Bures-sur-Yvette (FR), 20-21 Sept. 2022

Published
2022
Full Text
View/download PDF

18. Lo-fi Aero-Integration of DEP on a BWB including BLI

Author

Aalbers V.J.E. and Van Muijden, J.

Subjects
hybrid electric propulsion, green aviation, H2020 Transport, CINEA, hybrid-electric aircraft, IMOTHEP
Abstract

Presentation at the EUCASS-3AF 2022 in Lille (France) on July, 1st, 2022 (eucass-3af-2022.eu).

Published
2022
Full Text
View/download PDF

19. Design and performance evaluation of a full turboelectric distributed electric propulsion aircraft

Author

Van, Eric Nguyen, Defoort, Sebastien, Ridel, Michael, Donjat, David, Viguier, Christophe, Ali, Marwan, Youssef, Toni, Gerada, David, and Gerada, Christopher

Subjects
climate change, hybrid electric propulsion, green aviation, H2020 Transport, hybrid-electric aircraft, IMOTHEP
Abstract

Presentation at the EUCASS-3AF 2022 in Lille (France) on July, 1st, 2022 (eucass-3af-2022.eu). &nbsp

Published
2022
Full Text
View/download PDF

22. Model-based identification of high energy density solidstate lithium-ion batteries with hybrid electrolytes

Author

Toghyani, Somayeh, Baakes, Florian, Cistjakov, Walter, Zhang, Ningxin, Kühnelt, Helmut, and Krewer, Ulrike

Subjects
climate change, hybrid electric propulsion, H2020, green aviation, H2020 Transport, hybrid-electric aircraft, IMOTHEP
Abstract

Poster at the31st Topical Meeting of the International Society of Electrochemistry, Aachen, Germany, 15-19/5/2022.

Published
2022
Full Text
View/download PDF

23. Aerodynamic Effects of a Wing Surface Heat Exchanger

Author

Habermann Anaïs, Khot Ankit, Lampl David, and Perren Christof

Subjects
hybrid electric propulsion, H2020, H2020 Transport, CINEA, hybrid-electric aircraft, IMOTHEP
Abstract

Presentation at theAERO2022 - 56th 3AF Intern. Conf. On Applied Aerodynamics, 28-29-30/3/2022 Toulouse, France (https://www.3af-aerodynamics.com/)

Published
2022
Full Text
View/download PDF

30. IMOTHEP_1st TECHNOLOGY WORKSHOP_11112020_Intro

Author

Novelli, Philippe

Subjects
climate change, green aviation, H2020 Transport, INEA, HEP, IMOTHEP, IMOTHEPWS#1
Abstract

Presentation of IMOTHEP (intro) at the IMOTHEP 1st TECHNOLOGY WORKSHOP carried out online on Nov, 11th, 2020.

Published
2020
Full Text
View/download PDF

31. IMOTHEP_1st TECHNOLOGY WORKSHOP_11112020_RollsRoyce

Author

Armesmith, Riona

Subjects
climate change, green aviation, H2020 Transport, INEA, HEP, IMOTHEP, IMOTHEPWS#1
Abstract

Presentation of Rolls Royce's experience and vision on hybrid propulsion at the IMOTHEP 1st TECHNOLOGY WORKSHOP carried out online on Nov, 11th, 2020.

Published
2020
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results