Results 31 to 40 of about 26,791 (233)

An optical investigation on arc shortening features and its impacts on ignition process with multiple discharging system

Case Studies in Thermal Engineering
Flame kernel generation is essential to the stability and efficiency of combustion in a spark engine. In this study, the initial process of flame kernel generation was studied in an optical spark engine. The engine was operated with the λ adjusted from 1.
Zhiqiang Li, Jing Qin, Yiqiang Pei, Qi Zhan, Yingbo Wang   +4 more
doaj   +1 more source

Optical Investigation of a Partial Fuel Stratification Strategy to Stabilize Overall Lean Operation of a DISI Engine Fueled with Gasoline and E30

Energies, 2021
This paper offers new insights into a partial fuel stratification (PFS) combustion strategy that has proven to be effective at stabilizing overall lean combustion in direct injection spark ignition engines.
Cinzia Tornatore, Magnus Sjöberg
doaj   +1 more source

Numerical simulation on formation process of flame kernels.

TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series B, 1988
The formation process of flame kernels in the ignition process by electric sparks has been investigated by using a numerical simulation, which employs unsteady two-dimensional cylindrical co-ordinate systems. In the simulation, effects of the value of the diameter of spark electrodes and the width of the spark gap on the calculated results are mainly ...
Kenichi NIU, Tatsuro TSUKAMOTO, Yasusige UJIIE, Michikata KONO   +3 more
openaire   +1 more source

Multimodal Cross‐Attentive Graph‐Based Framework for Predicting In Vivo Endocrine Disruptors

Advanced Science, EarlyView.
A multimodal cross‐attentive graph neural network integrates molecular graphs with androgen and estrogen adverse outcome pathway (AOP)–anchored in vitro assay signals to predict in vivo endocrine disruption. By fusing information on Tier‐1 AOP logits with chemical structures, the framework achieves high accuracy and provides assay‐traceable ...
Eder Soares de Almeida Santos, Gustavo Felizardo Santos Sandes, Artur Christian Garcia da Silva, Holli‐Joi Martin, Eugene N. Muratov, Rodolpho de Campos Braga, Bruno Junior Neves   +6 more
wiley   +1 more source

Experimental study on the effect of discharge parameters of high-frequency nSDBD on the multi-point ignition characteristics of NH3/air mixture

Case Studies in Thermal Engineering
Multi-point ignition by high-frequency nanosecond surface dielectric barrier discharge (nSDBD) offers the potential to enhance the combustion speed of NH3/air mixtures.
Jie Tian, Lu Wang, Yongqi Wang, Wei Yin, Yong Xiong, Yong Cheng   +5 more
doaj   +1 more source

Optoelectronic‐Driven van der Waals Ferroelectric Materials‐Based Memory Devices for Retinomorphic and In‐Sensory Hardware

Advanced Science, EarlyView.
2D ferroelectrics materials enabling non‐volatile polarization memory, optical excitability, and neuromorphic processing within a unified material and provides a mechanistic analysis of polarization‐induced band modulation, including photon‐assisted domain reorientation, switching kinetics, and interfacial dipole coupling that governs resistive ...
Parthasarathi Pal, Yeong‐Her Wang, Sanjay Kumar, Themis Prodromakis   +3 more
wiley   +1 more source

Numerical study of high-energy spark ignition characteristics in a scramjet combustor

Case Studies in Thermal Engineering
Reliable ignition is a fundamental prerequisite for the scramjet engines. In order to improve the reliability of ignition, further enhance the application of spark ignition in engineering, and improve the ignition ability in the field of supersonic ...
Ziyan Gao, Meng Zhang, Zhibo Zhang, Yun Wu, Xing Zheng, Huifeng Miao   +5 more
doaj   +1 more source

Detecting the Flame Front Evolution in Spark-Ignition Engine under Lean Condition Using the Mask R-CNN Approach

Vehicles, 2022
In the wake of previous works, the authors propose a new approach for the identification and evolution of the flame front in an optical SI engine.
Luca Petrucci, Federico Ricci, Roberto Martinelli, Francesco Mariani   +3 more
doaj   +1 more source

Large-Eddy Simulation and experimental study of cycle-to-cycle variations of stable and unstable operating points in a spark ignition engine [PDF]

, 2012
This article presents a comparison between experiments and Large-Eddy Simulation (LES) of a spark ignition engine on two operating points: a stable one characterized by low cycle-to-cycle variations (CCV) and an unstable one with high CCV.
Dugué, Vincent, Enaux, Benoît, Granet, Victor, Lacour, Corine, Poinsot, Thierry, Vermorel, Olivier   +5 more
core   +3 more sources

Bayesian Optimization Guiding the Experimental Mapping of the Pareto Front of Mechanical and Flame‐Retardant Properties in Polyamide Nanocomposites

Advanced Intelligent Discovery, EarlyView.
Bayesian optimization enabled the design of PA56 system with just 8 wt% additives, achieving limiting oxygen index 30.5%, tensile strength 80.9 MPa, and UL‐94 V‐0 rating. Without prior knowledge, the algorithm uncovered synergistic effects between aluminum diethyl‐phosphinate and nanoclay.
Burcu Ozdemir, Miguel Hernández‐del‐Valle, Christina Schenk, De‐Yi Wang, Maciej Haranczyk   +4 more
wiley   +1 more source