Browsing by Author "Deja, Jakub"
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Item Open Access 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, DavidThe 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.Item Open Access Graphic abstract(Cranfield University, 2022-06-07 12:41) Deja, Jakub; Dayyani, Iman; Skote, MartinModelling and Performance Evaluation of Sustainable ArrestingGear Energy Recovery System for Commercial AircraftItem Open Access Modelling and performance evaluation of sustainable arresting gear energy recovery system for commercial aircraft(Taylor & Francis, 2022-11-21) Deja, Jakub; Dayyani, Iman; Skote, MartinA 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.Item Open Access 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, VarunSupplementary data for the manuscript entitled "More Electric Aircraft Conversion to All-Electric During Ground Operations: Battery Powered Landing Gear Drive System"Item Open Access 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, DavidSupplementary 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