Browsing by Author "Deja, Jakub"

Now showing 1 - 8 of 8
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    Data: Modeling and performance evaluation of sustainable arresting gear energy recovery system for commercial aircraft
    (Cranfield University, 2023-08-07 11:48) Deja, Jakub; Skote, Martin; Dayyani, Iman
    Datasets showing the system performance for different aircraft
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    Energy harvesting frictionless brakes for short-haul aircraft: thermal and electromagnetic feasibility of an axial-flux machine for a landing gear drive system
    (AIAA, 2023-06-08) Deja, Jakub; Akbari, Amir; Dayyani, Iman; Stote, Martin; Lowther, David
    The aviation industry is currently responding to climate change with, among other technologies, electrification of aircraft, and the corresponding onboard electrical architecture provides an opportunity for electromagnetic brakes. The present work introduces a multistage yokeless and segmented armature (YASA) electric machine that replaces friction brakes and harvests kinetic energy throughout a landing. The study establishes the optimal trade-off between weight and electromagnetic torque and translates it into the design requirements for the development of an electric machine. Electromagnetic modeling is conducted using a quasi-3D transient approach and static 3D validation. The results reach 120 Nm/kg active material torque density at approximately 50 A/mm² current density. The proposed solution enables fitting an electric machine that decelerates an aircraft at autobrake level LOW for Airbus and the "1" and "2" settings for Boeing. A thermal analysis follows, where a novel cruise altitude cooling method is proposed.
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    Graphic abstract
    (Cranfield University, 2022-06-07 12:41) Deja, Jakub; Dayyani, Iman; Skote, Martin
    Modelling and Performance Evaluation of Sustainable ArrestingGear Energy Recovery System for Commercial Aircraft
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    Modelling and performance evaluation of sustainable arresting gear energy recovery system for commercial aircraft
    (Taylor & Francis, 2022-11-21) Deja, Jakub; Dayyani, Iman; Skote, Martin
    A significant amount of kinetic energy is dissipated during each commercial aircraft landing. To improve energy efficiency and environmental sustainability, the kinetic energy can instead be converted to electricity by utilizing the arresting gear systems. This paper presents a novel design that couples an arresting gear system to electrical generators. The results show that the system can successfully recover aircraft kinetic energy and is applicable to different aircraft sizes ranging from Airbus A319 up to A380. Beyond system performance, wider context technical aspects including system integration into grid with multiple energy storage possibilities, safety and passenger comfort are discussed.
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    More electric aircraft conversion to all-electric during ground operations: battery powered landing gear drive system
    (IEEE, 2023-03-28) Deja, Jakub; Dayyani, Iman; Nair, Varun; Skote, Martin
    Raising awareness about environmental issues moves the aerospace industry towards electrification and the corresponding solutions are already present at some airports. However, commercial aircraft are the missing links in claiming the all-electric ground operations. They rely on fossil fuels without any electric alternative due to the technological inability to store large amounts of energy while maintaining low weight of batteries. The issue diminishes if an electric system uses only a fraction of energy normally consumed by the engines and comprises kinetic energy recovery. Accordingly, this paper demonstrates the landing gear drive system for a narrowbody air-plane which has the sustainable and economic means to replace all onboard engines throughout ground operations. The system is simulated in MATLAB/Simulink and leads to the kinematic results which are based on the real drive cycles. The kinematics are subsequently used to estimate the overall on-ground power and energy demand of a more electric aircraft (MEA). The impact is maximized with the components scaled according to performance metrics and two-speed gear ratio optimization. The net fuel advantage is demonstrated for different ground operation modes, taxi times and flight path lengths.
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    Poster: All-Electric Ground Operations for More Electric Aircraft
    (Cranfield University, 2022-11-14 16:25) Deja, Jakub; Dayyani, Iman; Skote, Martin
    Raising awareness about environmental issues shifts the aerospace industry towards electrification and the corresponding solutions are already present from the airport perspective. Commercial aircraft are the missing links in claiming the all-electric ground operations. They rely on fossil fuels without any electric alternative due to the technological inability to store large amounts of energy while maintaining low weight of batteries. The possible mitigation is to utilize the available electrical energy with high efficiency. This paper demonstrates the landing gear drive system for a narrowbody airplane which has the sustainable and economic grounds to replace all onboard engines during ground operations. The novel concept of kinetic energy recovery during landing is brought together with the developments from recent publications. This combination is modelled and simulated in MATLAB/Simulink and leads to the kinematic results which are based on the authentic taxiing data. The kinematics are then used to estimate the overall on-ground power and energy demand of a more electric aircraft. The impact is maximized with the components scaled according to present and future performance metrics and two-stage gear ratio optimization. The net fuel advantage is demonstrated for different ground operation modes, taxi times and flight path lengths.
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    Supplementary data for "More Electric Aircraft Conversion to All-Electric During Ground Operations: Battery Powered Landing Gear Drive System"
    (Cranfield University, 2023-02-07 09:01) Deja, Jakub; Skote, Martin; Dayyani, Iman; Nair, Varun
    Supplementary data for the manuscript entitled "More Electric Aircraft Conversion to All-Electric During Ground Operations: Battery Powered Landing Gear Drive System"
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    Supplementary data: Energy Harvesting Frictionless Brakes for Short-Haul Aircraft: Thermal and Electromagnetic Feasibility of an Axial-Flux Machine for a Landing Gear Drive System
    (Cranfield University, 2023-05-22 09:23) Deja, Jakub; Skote, Martin; Dayyani, Iman; Akbari, Amir; Lowther, David
    Supplementary data for conference paper entitled "Energy Harvesting Frictionless Brakes for Short-Haul Aircraft: Thermal and Electromagnetic Feasibility of an Axial-Flux Machine for a Landing Gear Drive System" presented at AIAA Aviation Forum 2023