Results 31 to 40 of about 311,616 (207)

From the Discovery of the Giant Magnetocaloric Effect to the Development of High‐Power‐Density Systems

Advanced Materials Technologies, EarlyView.
The article overviews past and current efforts on caloric materials and systems, highlighting the contributions of Ames National Laboratory to the field. Solid‐state caloric heat pumping is an innovative method that can be implemented in a wide range of cooling and heating applications.
Agata Czernuszewicz, Yaroslav Mudryk, Jun Cui, Lucas Griffith, Duane D. Johnson, Julie Slaughter   +5 more
wiley   +1 more source

Department of Aeronautics and Astronautics Graduate School of Engineering and Applied Sciences [PDF]

, 2002
The Department of Aeronautics and Astronautics is an integral part of the Graduate School of Engineering and Applied Sciences. Aero/Astro faculty members conduct research and teach courses covering air and space vehicles, missiles, propulsion ...

core   +2 more sources

Multidisciplinary Design Optimization of Reentry-Powered Hypersonic Vehicles Based on Surrogate Model

International Journal of Aerospace Engineering
Two problems exist in the study of the trajectory optimization problem of powered hypersonic gliding vehicles (HGVs) due to insufficient consideration of the overall design constraints as well as the strong couplings among relevant disciplines: (1) the ...
Shoudong Ma, Yuxin Yang, Yesi Chen, Hua Yang, Weifang Chen   +4 more
doaj   +1 more source

Deduction of Proper Reaction Rate of Steam Methane Reforming over Catalyst Surface Validated with a Combination of One- and Two-Dimensional Simulations

Journal of Thermal Science and Technology, 2012
Hydrogen can be used not only as a fuel, but also for the chemical processing. One of the applications is as a synthesis gas in the gas-to-liquid (GTL) process which produces liquid fuel from a gaseous one and has tremendous potential for the future ...
Kyaw Kyaw LIN, Motohiro SAITO, Yasuhiro NIINA, Kimitaka IKEMURA, Hiroshi IWAI, Hideo YOSHIDA   +5 more
doaj   +1 more source

Ultrafast Optoacoustics Reveals Intricate 3D Anisotropic Elasticity in Nanocrystalline Membranes

Advanced Science, EarlyView.
Ultrafast optoacoustic spectroscopy combined with a Sagnac interferometer enables non‐contact, simultaneous characterization of thickness and the full three‐dimensional anisotropic elastic constants in freestanding nanocrystalline copper membranes. By capturing gigahertz Lamb waves and zero‐group‐velocity resonances followed by SAFE‐GA inversion, the ...
Shuchang Zhang, Yi He, Guojie Luo, Jie Huang, Pak San Yip, Haoyu Cui, Wanglinhan Zhang, Zijian Wang, Lin Ye, Yang Lu, Zhongqing Su, Yehai Li   +11 more
wiley   +1 more source

A mathematical model for predicting the pressure drop in a rotating cavity with a tubed vortex reducer

Engineering Applications of Computational Fluid Mechanics, 2019
The flow characteristics of a tubed vortex reducer, which was used to reduce the pressure drop in an aeroengine air bleed system, were studied in this paper.
Song Wei, Jiaxi Yan, Junkui Mao, Xingsi Han, Zecan Tu   +4 more
doaj   +1 more source

An Initial Residual Stress Inference Method by Incorporating Monitoring Data and Mechanism Model

Chinese Journal of Mechanical Engineering, 2022
Initial residual stress is the main reason causing machining deformation of the workpiece, which has been deemed as one of the most important aspects of machining quality issues.
Shuguo Wang, Yingguang Li, Changqing Liu, Zhiwei Zhao   +3 more
doaj   +1 more source

Origami Metamaterials Based on Low‐Melting‐Point Alloy Phase Transition: Breaking the Trade‐Off Between Reusability and Energy Absorption Quality

Advanced Science, EarlyView.
This work presents an origami metamaterial that integrates a low‐melting‐point alloy skeleton into an elastomeric shell. It dissipates energy through the metal's plastic deformation and recovers through the solid–liquid phase transition of the alloy together with the hyperelasticity of the shell.
Yupeng Liu, Wei Zhao, Chengjun Zeng, Jiuming Fan, Yanju Liu, Jinsong Leng   +5 more
wiley   +1 more source

UAV autonomous path optimization simulation based on radar tracking prediction

EURASIP Journal on Wireless Communications and Networking, 2018
In the UAV path planning study, due to the relative movement of multiple targets and the UAV, long-term and large-scale UAV, autonomous tracking has not been achieved.
Bo Wang, Jianwei Bao, Li Zhang, Qinghong Sheng   +3 more
doaj   +1 more source

Closed-Loop Fault Diagnosis of SDR Using Gap Metric, PCA, and Kalman’s Principle

International Journal of Aerospace Engineering, 2023
The measurement of the pressure in the gas generator (GG) plays a decisive role in the closed-loop regulation of the gas flow in a solid ducted rocket ramjet (SDR).
Hongfu Wang, Qinghua Zeng, An Wang, Zongyu Zhang, Weide Liu   +4 more
doaj   +1 more source