Results 41 to 50 of about 632,931 (350)

From a Battery-Based to a PEM Fuel Cell-Based Propulsion Architecture on a Lightweight Full Electric Aircraft: A Comparative Numerical Study

Aerospace, 2022
The aviation sector is firmly committed to reducing harmful emissions and electric propulsion promises to tackle both pollution and noise at the same time.
Gianluca Marinaro, Giuseppe Di Lorenzo, Antonio Pagano   +2 more
doaj   +1 more source

A Megawatt-Scale Medium-Voltage High Efficiency High Power Density “SiC+Si” Hybrid Three-Level ANPC Inverter for Aircraft Hybrid-Electric Propulsion Systems

European Conference on Cognitive Ergonomics, 2018
Hybrid-electric propulsion system is an enabling technology to make the aircrafts more fuel-saving, quieter, and lower carbide emission. In this paper, a megawatt-scale power inverter based on a three-level active neutral-point-clamped (3L-ANPC) topology
Di Zhang, Jiangbiao He, D. Pan
semanticscholar   +1 more source

Aircraft electric power plants

Вестник Самарского университета: Аэрокосмическая техника, технологии и машиностроение
The paper presents a review of electrification of the existing propulsion systems and creating new hybrid propulsion systems based on the concept of more electric aircraft and all-electric aircraft in Russia and abroad.
A. D. Kondryakov, M. K. Leontiev
doaj   +1 more source

Propulsion systems and low-thrust rocket engines based on various physical principles for control systems of small and micro-spacecraft

Вестник Самарского университета: Аэрокосмическая техника, технологии и машиностроение, 2018
The article presents an analysis of the possibility of using propulsion systems and rocket thrusters based on various physical principles and used as part of small and very small spacecraft.
V. V. Ryzhkov, A. V. Sulinov
doaj   +1 more source

Advanced Design of Naval Ship Propulsion Systems Utilizing Battery-Diesel Generator Hybrid Electric Propulsion Systems

Journal of Marine Science and Engineering
As advanced sensors and weapons require high power, naval vessels have increasingly adopted electric propulsion systems. This study aims to enhance the efficiency and operability of electric propulsion systems over traditional mechanical propulsion ...
Youngnam Park, Heemoon Kim
doaj   +1 more source

Characterization of Nitinol Produced by Laser Powder Bed Fusion for Mechanical Metamaterial Applications

Advanced Engineering Materials, EarlyView.
Stabilization of L‐PBF Ni50.7Ti49.3 under low‐cycle loading was investigated. Recoverable strain after cycling was dependent on the amount of applied load. Recovery ratio was 53.4% and 35.1% at intermediate and high load, respectively. The maximum total strain reached 10.3% at a high load of 1200 MPa.
Ondřej Červinek, Jakub Hurník, Miroslav Šmíd, Ondřej Zobač, Melanie Todt, Daniel Koutný   +5 more
wiley   +1 more source

Air‐Pressure–Actuated Vibroacoustic Metamaterial With Tunable Bandgap: Design, Modeling, and Characterization

Advanced Engineering Materials, EarlyView.
This article presents the design, modeling, and characterization of air‐pressure–actuated programmable vibroacoustic metamaterials (PVAMM). The study focuses on leveraging air pressure to dynamically tune resonance frequencies for effective noise attenuation.
William Kaal, Michael M. Becker, Sarah C. L. Fischer   +2 more
wiley   +1 more source

Electric Machine Design and Integration for an Electric Propulsion System in Medium-Altitude Long-Endurance Unmanned Aerial Vehicles

Applied Sciences
Unmanned Aerial Vehicles (UAVs) are increasingly used in both civilian and military applications around the world. There are several types of UAVs with classifications according to several quantities.
Emre Kurt, Ahmet Yigit Arabul, Fatma Keskin Arabul, Ibrahim Senol   +3 more
doaj   +1 more source

Dielectric Barrier Discharge Plasma Deoxidation of Natively Oxide Layer of Copper Powders in a Fluidized Bed

Advanced Engineering Materials, EarlyView.
This paper presents a novel approach to reducing oxide layers on metal powders using low‐temperature hydrogen dielectric barrier discharge plasmas at atmospheric pressure. Unlike conventional hydrogen‐plasma reductions, the powders do not contact the plasma directly.
Shukang Zhang, Annett Wollmann, Thomas Gimpel, Alfred P. Weber   +3 more
wiley   +1 more source

Ion Electric Propulsion System Electric Breakdown Problems: Causes, Impacts and Protection Strategies

IEEE Access, 2023
Ion electric propulsion systems have been widely used in satellite station keeping, attitude control, and orbit transfer due to their advantages of high specific impulse, good flexibility, and high reliability.
Zheng Peng, Zongliang Li, Fei Song, Yu Zhang, Huan Xi, Feng Liu   +5 more
doaj   +1 more source