Results 51 to 60 of about 1,435,648 (384)

Study on multi-spectral inversion of temperature and soot concentration in flames

Zhongguo Jianchuan Yanjiu, 2019
[Objectives]In order to accurately understand the temperature inside the flame and the distribution of soot concentration,[Methods]the distribution of the two-dimensional temperature and the soot volume fraction inverted from the spectral intensity image
Zhang Qi, Si Mengting, Wang Dongxu, Wang Anzhen, Li Can, Wang Zhen, Luo Zixue, Lou Chun, Cheng Qiang   +8 more
doaj   +1 more source

A Comprehensive Review of Additive Manufacturing for Space Applications: Materials, Advances, Challenges, and Future Directions

Advanced Engineering Materials, EarlyView.
Additive manufacturing (AM) transforms space hardware by enabling lightweight, high‐performance, and on‐demand production. This review outlines AM processes—powder bed fusion (PBF), directed energy deposition (DED), binder jetting (BJ), sheet lamination (SL), and material extrusion (ME)—applied to propulsion, satellite structures, and thermal devices ...
Stelios K. Georgantzinos, Eleni Papadopoulou, Grigorios Kostopoulos, Stefanos Voulgaris, Alexandra Tseni, Panteleimon Bakalis, Maria Gkara, Chara C. Mitropoulou, Nikos D. Lagaros   +8 more
wiley   +1 more source

Numerical Analysis of Solid Rocket Motor Instabilities With AP Composite Propellants [PDF]

, 1999
A non-steady model for the combustion of ammonium perchlorate composite propellants has been developed in order to be incorporated into a comprehensive gasdynamics model of solid rocket motor flow fields.
Beddini, Robert A., Cohen, Norman S., Culick, Fred E. C., Roh, Tae-Seong   +3 more
core  

Direct Recycling of Cold Work Tool Steel Swarf into New Cutting Disks via Field‐Assisted Sintering

Advanced Engineering Materials, EarlyView.
Through a sintering method known as field‐assisted sintering technology/spark plasma sintering, cold work tool steel swarf can be directly recycled into new cutting disks. This method is capable of densifying the unconventional powder morphology of swarf, and it can also seal grinding contaminants, such as Al2O3, into the steel matrix.
Monica Keszler, Felix Großwendt, Olivier Guillon, Sebastian Weber, Martin Bram   +4 more
wiley   +1 more source

Alignment of Smulation Methodology and Measurement Techniqus to Predict the HC-Distribution at Catalyst Inlet for Exhaust Fuel Injection

International Journal of Automotive Engineering, 2019
Injection of fuel into the exhaust system is used to support the operation of exhaust gas aftertreatment systems. When injecting a fluid into the exhaust system, one major challenge is to design the exhaust system for optimal fuel distribution and to ...
Verna Huth, Avnish Dhongde, Daniel Klein, Marco Günther, Stefan Pischinger, Takao Fukuma   +5 more
doaj   +1 more source

Intermolecular Interactions as Driving Force of Increasing Multiphoton Absorption in a Perylene Diimide‐Based Coordination Polymer

Advanced Functional Materials, EarlyView.
This study uncovers the unexplored role of intermolecular interactions in multiphoton absorption in coordination polymers. By analyzing [Zn2tpda(DMA)2(DMF)0.3], it shows how the electronic coupling of the chromophores and confinement in the MOF enhance two‐and three‐photon absorption.
Simon Nicolas Deger, Anna Mauri, Yang Cui, Sebastian Josef Weishäupl, Ali Deniz Özdemir, Hamad Syed, Aleksandr Ovsianikov, Wolfgang Wenzel, Alexander Pöthig, Jürgen Hauer, Mariana Kozlowska, Roland Augustinus Fischer   +11 more
wiley   +1 more source

An improved grey wolf algorithm and its localization research in complex indoor environments

Scientific Reports
In complex indoor environments, traditional localization methods often suffer from non-line-of-sight (NLOS) and multipath problems, which lead to unsolvable or incorrectly solved mathematical localization models, thereby limiting localization accuracy. A
Bing Li, Yanxin Hao, Yiyang Cui, Xingshao Chai, Jingmei Zhou, Chungang Liu   +5 more
doaj   +1 more source

A study on the relationship between vehicle operating conditions and NOx emission characteristics [PDF]

E3S Web of Conferences
To address the challenges faced by vehicles during actual operation when passing through traffic lights or intersections, where rapid changes in operating conditions can lead to a decrease in SCR efficiency and an increase in NOx emissions, this study ...
Xia Ran, Wang Yu, Feng Yifang, Chen Tao, Qin Jing   +4 more
doaj   +1 more source

Development of a Multiphase Photon Monte Carlo Method for Spray Combustion and its Application in High-pressure Conditions [PDF]

, 2017
In this work the development of a multiphase photon Monte Carlo (PMC) method with a focus on resolving radiative heat transfer in combustion simulations is presented.
Cai, Jian, Modest, Michael F., Roy, Somesh   +2 more
core   +2 more sources

Atomic Size Misfit for Electrocatalytic Small Molecule Activation

Advanced Functional Materials, EarlyView.
This review explores the application and mechanisms of atomic size misfit in catalysis for small molecule activation, focusing on how structural defects and electronic properties can effectively lower the energy barriers of chemical bonds in molecules like H2O, CO2, and N2.
Ping Hong, Changfan Xu, Huaping Zhao, Yong Lei   +3 more
wiley   +1 more source