Results 41 to 50 of about 656,343 (134)

Dispersion and Explosion Characteristics of Hydrogen Released from a Hydrogen Fuel Cell Vehicle

Fire
Safety concerns regarding hydrogen dispersion, fire, and explosion hinder the commercialization of hydrogen fuel cell vehicles (HFCVs). This study developed and validated a numerical model for hydrogen leakage, dispersion, and explosion in representative
Zhixin Wu, Dianji Wang, Xuefang Li, Huan Liu, Shishuai Nie, Peirong Chen, Wenfeng Zhan   +6 more
doaj   +1 more source

Ignition and flame sptead in laminar mixing layers [PDF]

, 1994
In order to identify some of the mathematical problems encoun-tered in analyzing the ignition and ñame spread in mixing layéis, \ve shall describe the structure of the laminar mixing layer between two parallel streams of a fu el and air, initially ...
Liñán Martínez, Amable
core  

Lean ammonia-fueled engine operation enabled by hydrogen-assisted turbulent jet ignition

Frontiers in Mechanical Engineering
Anhydrous ammonia (NH3) use in internal combustion engines represents a zero-carbon energy solution that is fully sustainable if NH3 is generated renewably.
Shawn A. Reggeti, William F. Northrop
doaj   +1 more source

Transcritical real-fluid effects on dual-fuel combustion of methane and n-dodecane

Applications in Energy and Combustion Science
A comprehensive set of accurate physical models and numerical simulation methods for transcritical dual fuel combustion systems is presented. The method combines multiphase real-fluid physical properties modeling, flamelet-based chemistry reduction, and ...
Mohamad Fathi, Dirk Roekaerts, Stefan Hickel   +2 more
doaj   +1 more source

On the features of diffusion combustion of hydrogen microjets [PDF]

E3S Web of Conferences
This paper presents the results of an experimental investigation of the diffusion combustion scenario of a round hydrogen microjet flowing from a cylindrical thin-walled micronozzle with a diameter of 200 μm when ignited near and at any distance from the
Tambovtsev Alexander, Kozlov Victor, Litvinenko Yuriy, Pavlenko Alexander, Shmakov Andrey   +4 more
doaj   +1 more source

MILD pulverized combustion technology: The latest research progress and key scientific issues

Meitan xuebao
The MILD combustion is a combustion mode that occurs in a moderate or extremely low oxygen environment, combining the advantages of high combustion heat utilization and very low NOx emissions, and is considered by the international combustion field to be
Junfu LÜ, Lele FENG, Yuxin WU, Hai ZHANG   +3 more
doaj   +1 more source

Large Eddy Simulation of Autoignition in a Turbulent Hydrogen Jet Flame Using a Progress Variable Approach

Journal of Combustion, 2012
The potential of a progress variable formulation for predicting autoignition and subsequent kernel development in a nonpremixed jet flame is explored in the LES (Large Eddy Simulation) context. The chemistry is tabulated as a function of mixture fraction
Rohit Kulkarni, Wolfgang Polifke
doaj   +1 more source

Numerical simulation of reacting and non-reacting liquid jets in supersonic crossflow

Applications in Energy and Combustion Science
Canonical jet in supersonic crossflow (JISC) studies have been widely used to study fundamental physics relevant to a variety of applications. While most JISC works have considered injection of gases, liquid injection is also of practical interest and ...
Michael Ullman, Shivank Sharma, Venkat Raman   +2 more
doaj   +1 more source

Prechamber selection for a two stage turbulent jet ignition of lean air-gas mixtures for better economy and emission

E3S Web of Conferences, 2018
The paper presents the results of thermodynamic and exhaust emission analyses of the combustion process using three combustion chambers. The combustion process research was performed on a single-cylinder AVL 5804 engine equipped with a dual-band ...
Pielecha Ireneusz, Wislocki Krzysztof, Cieslik Wojciech, Fiedkiewicz Lukasz   +3 more
doaj   +1 more source

Numerical investigation on turbulent flame jet characteristics of ultra-lean H2/air ignited by pre-chamber enrichment strategy

Energy Conversion and Management: X
Pre-chamber enrichment for igniting ultra-lean premixed H2/air is an effective strategy for achieving ultra-low emission and improved fuel economy. This study employed a three-dimensional numerical simulation based on a constant volume combustion chamber
Wenchao Zhu, Xuanrui Zhang, Mingkun Zhang, Shuo Yin, Xianrong Wu, Wuqiang Long, Xiangyu Meng   +6 more
doaj   +1 more source