Results 111 to 120 of about 185,594 (366)

Robust C–V Ratio Technique for Profiling Defects in Proton‐Irradiated 4H‐SiC

Advanced Electronic Materials, EarlyView.
A noise‐robust C–V ratio technique is introduced to profile radiation‐induced defects in proton‐irradiated 4H‐SiC Schottky diodes. By using analytical capacitance ratios instead of numerical differentiation, the method directly extracts trap‐density and effective trap‐energy profiles at room temperature.
Kibeom Kim, Sung Yun Woo, Jeong Hyun Moon, Young Jun Yoon, Jae Hwa Seo   +4 more
wiley   +1 more source

A comprehensive aerodynamic-thermal-mechanical design method for fast response turbocharger applied in aviation piston engines

Propulsion and Power Research
Limited by the poor transient response performance of turbochargers, the dynamic performance of aviation piston engines tends to deteriorate. In a bid to enhance the turbocharger's acceleration capabilities, this study scrutinizes various factors ...
Yu Zhou, Yue Song, Shuai Zhao, Xueyu Li, Longtao Shao, Huansong Yan, Zheng Xu, Shuiting Ding   +7 more
doaj   +1 more source

A simple dynamic engine model for use in a real-time aircraft simulation with thrust vectoring [PDF]

A simple dynamic engine model was developed at the NASA Ames Research Center, Dryden Flight Research Facility, for use in thrust vectoring control law development and real-time aircraft simulation.
Johnson, Steven A.
core   +1 more source

Leveraging Digital Advanced Manufacturing to Enable Polymer Electrolyte Fuel Cells With Ultrahigh Gravimetric Power Density

Advanced Energy Materials, EarlyView.
This study employs digital advanced manufacturing to develop lightweight, compact porous distributors as alternatives to conventional bipolar plates in PEM fuel cells. A graphene‐coated nickel foam achieves a power density of 1.52 W cm−2, while titanium‐based designs deliver lightweight solutions: an LPBF‐fabricated Gyroid lattice reaches 1.36 W cm−2 ...
Hadi Heidary, Vahid Nasrollahi, Daniel Wilmot, Jacob Bracegirdle‐Morais, Sophie C. Cox, Stefan Dimov, Moataz M. Attallah, Ahmad El‐kharouf, Sara Walker, Robert Steinberger‐Wilckens   +9 more
wiley   +1 more source

Propulsion system study for Small Transport Aircraft Technology (STAT) [PDF]

Propulsion system technologies applicable to the generation of commuter airline aircraft expected to enter service in the 1990's are identified and evaluated in terms of their impact on aircraft operating economics and fuel consumption.
Hirschkron, R., Smith, C. E., Warren, R. E.   +2 more
core   +1 more source

The Future of Hydrogen‐Powered Aviation: Technologies, Challenges, and a Strategic Roadmap for Sustainable Decarbonization

Advanced Energy and Sustainability Research, EarlyView.
Hydrogen‐powered aviation offers a transformative pathway to zero‐emission flight by eliminating in‐flight CO2 emissions. Key considerations include propulsion systems (fuel cells and hydrogen combustion), cryogenic storage and insulation challenges, infrastructure and cost barriers, and supply‐chain constraints.
Mubasshira, Md Mahbubur Rahman, Karib Hassan Khan, Md Nizam Uddin, Dewan Hafiz Nabil   +4 more
wiley   +1 more source

Study of Turbofan Engines Designed for Low Enery Consumption [PDF]

Subsonic transport turbofan engine design and technology features which have promise of improving aircraft energy consumption are described. Task I addressed the selection and evaluation of features for the CF6 family of engines in current aircraft, and ...
Hirschkron, R., Johnston, R. P., Neitzel, R. E.   +2 more
core   +1 more source

Smart Bioinspired Material‐Based Actuators: Current Challenges and Prospects

Advanced Intelligent Systems, Volume 7, Issue 3, March 2025.
This work gathers, in a review style, an extensive and comprehensive literature overview on the development of autonomous actuators based on synthetic materials, bringing together valuable knowledge from several studies. Furthermore, the article identifies the fundamental principles of actuation mechanisms and defines key parameters to address the size
Alejandro Palacios, Léon Chiriatti, Simon Poppinga, Thomas Speck, Vincent Le Houérou   +4 more
wiley   +1 more source

Physics-informed transfer learning model for fatigue life prediction of IN718 alloy

Journal of Materials Research and Technology
To address the challenges posed by inadequate data and data utilization in multiple scenarios of fatigue loading, a Physics-informed Transfer Learning (PITL) model has been developed to predict the fatigue life of IN718 superalloy.
Baihan Chen, Jianfeng Zhang, Shangcheng Zhou, Guangping Zhang, Fang Xu   +4 more
doaj   +1 more source

Flight evaluation of an extended engine life mode on an F-15 airplane [PDF]

An integrated flight and propulsion control system designed to reduce the rate of engine deterioration was developed and evaluated in flight on the NASA Dryden F-15 research aircraft.
Conners, Timothy R., Myers, Lawrence P.
core   +1 more source