Results 81 to 90 of about 1,236,598 (336)

Modeling pressure oscillations in Ramjets [PDF]

, 1980
Pressure oscillations in ramjet engines are approximated as one-dimensional motions and treated within linear acoustics. The exhaust nozzle is represented by the admittance function for a short choked nozzle.
Culick, F. E. C., Rogers, T.
core  

Hydrogen SI and HCCI Combustion in a Direct-Injection Optical Engine [PDF]

, 2009
Hydrogen has been largely proposed as a possible alternative fuel for internal combustion engines. Its wide flammability range allows higher engine efficiency with leaner operation than conventional fuels, for both reduced toxic emissions and no CO2 ...
Aleiferis, PG, Rosati, MF
core   +1 more source

Reevaluating the Activity of ZIF‐8 Based FeNCs for Electrochemical Ammonia Production

Advanced Functional Materials, EarlyView.
Though receiving much attention, the field of electrochemical nitrogen reduction reaction (eNRR) to ammonia is marked by doubts about whether this reaction is possible in aqueous media. This work sheds light on this question for iron single‐atom on N‐doped carbon (FeNC) catalysts—a class of well‐known catalysts that is also worth testing for the sister
Caroline Schneider, S. Esmael Balaghi, Niklas Ortlieb, Patrick Elsaesser, Sima Heidari, Christopher S. Allen, Anna Fischer   +6 more
wiley   +1 more source

Growth of Millimeter‐Sized BaTaO2N Single Crystals by an NH3‐Assisted BaCl2 Flux Method

Advanced Functional Materials, EarlyView.
Millimeter‐sized BaTaO2N single crystals are successfully grown from a BaCl2 flux under NH3 flow. Their comprehensive characterization, including dielectric properties, is demonstrated, and the possible growth mechanisms are discussed. Abstract Perovskite‐type oxynitrides have attracted considerable attention due to their excellent photocatalytic ...
Ginji Harada, Mirabbos Hojamberdiev, Hajime Wagata   +2 more
wiley   +1 more source

Effect of steam addition on the flow field and NOx emissions for Jet-A in an aircraft combustor [PDF]

, 2016
The steam injection technology for aircraft engines is gaining rising importance because of the strong limitations imposed by the legislation for NOx reduction in airports.
Hu, Chunbo, Nikolaidis, Theoklis, Pilidis, Pericles, Xue, Rui   +3 more
core   +1 more source

Insight into the Internal Structure of Biogenic, Synthetic and Geological Apatite by Electron Microscopy and X‐Ray Scattering

Advanced Functional Materials, EarlyView.
Apatite occurs in many forms in nature, e.g. in teeth and geological minerals. Internally, biological apatite contains nanocrystals that are also found in synthetically prepared calcium phosphate nanoparticles which are used in biomedicine, e.g. for gene and drug delivery and for bone regeneration. Abstract Calcium phosphate is the inorganic component (
Kathrin Kostka, Oleg Prymak, Kateryna Loza, Matthias Epple   +3 more
wiley   +1 more source

Solvent‐Free Bonding Mechanisms and Microstructure Engineering in Dry Electrode Technology for Lithium‐Ion Batteries

Advanced Functional Materials, EarlyView.
Dry electrode technology revolutionizes battery manufacturing by eliminating toxic solvents and energy‐intensive drying. This work details two promising techniques: dry spray deposition and polymer fibrillation. How their unique solvent‐free bonding mechanisms create uniform microstructures for thicker, denser electrodes, boosting energy density and ...
Yuhao Liang, Hao Long, Zimo Huang, Ting He, Xueming Chen, Meng Li, Hao Chen, Shanqing Zhang   +7 more
wiley   +1 more source

The lightweight design of steel pistons for diesel engines based on thermo-mechanical characteristics

Scientific Reports
Traditional aluminum–silicon alloy pistons are gradually replaced by steel pistons, which has become the trend of future diesel engine development. However, the efficient design and broad application of steel pistons are limited by the higher density of ...
Yang Liu, Jilin Lei, Jikun Chen, Weiwei Gao, Hu Peng, Jianrui Wang   +5 more
doaj   +1 more source

Dynamic Deformation Testing and Analysis of Wet Cylinder Liners Using the Eddy Current Method

Energies
Improving the thermal efficiency of internal combustion engines plays a crucial role in reducing fuel consumption and engine emissions. Studies have shown that the friction loss caused by the piston ring–cylinder liner pair accounts for approximately 30 ...
Haining He, Lizhong Shen, Song Zu, Yuchen Xu, Jianping Song, Yuhua Bi   +5 more
doaj   +1 more source

A Review of Hydrogen Direct Injection for Internal Combustion Engines: Towards Carbon-Free Combustion

Applied Sciences, 2019
A paradigm shift towards the utilization of carbon-neutral and low emission fuels is necessary in the internal combustion engine industry to fulfil the carbon emission goals and future legislation requirements in many countries.
H. L. Yip, A. Srna, A. Yuen, S. Kook, R. Taylor, G. Yeoh, P. Medwell, Q. Chan   +7 more
semanticscholar   +1 more source