4.7 Article

Explosion behavior of methane-air mixtures and Rayleigh-Taylor instability in the explosion process near the flammability limits

相关参考文献

注意:仅列出部分参考文献,下载原文获取全部文献信息。
Article Thermodynamics

Analysis of the ignition induced by shock wave focusing equipped with conical and hemispherical reflectors

Bo Zhang et al.

Summary: This study investigates the ignition behavior in various reflectors due to shock wave reflection, analyzing the differences between weak ignition and strong ignition modes in different reflectors. The critical values of incident shock wave velocity and ignition delay time for different reflectors are provided, revealing the influence of reflector shape on ignition performance under shock wave focusing.

COMBUSTION AND FLAME (2022)

Article Energy & Fuels

Experimental study on premixed combustion characteristics of methane-air under dual spark plug ignition strategy in a closed spherical chamber

Yanfei Li et al.

Summary: Dual spark plug ignition technology improves the low heat release rate of natural gas engines. This study investigated the flame stability and ion current mechanism of double flame combustion. The results showed that synchronous ignition leads to better flame stability and higher combustion velocity, making it a promising ignition strategy.
Article Thermodynamics

Effects of Rayleigh-Taylor instabilities on turbulent premixed flames in a curved rectangular duct

Joshua P. Sykes et al.

Summary: The study used large-eddy simulations to demonstrate the effects of Rayleigh-Taylor instabilities on turbulent premixed flames stabilized in a curved rectangular duct. It was found that the RTI increases the turbulent flame speed primarily through increased flame surface area, and also increases the range of local flame stretches and curvatures.

PROCEEDINGS OF THE COMBUSTION INSTITUTE (2021)

Article Energy & Fuels

The precursor shock wave and flame propagation enhancement by CO2 injection in a methane-oxygen mixture

Jun Cheng et al.

Summary: A new method using a non-reactive CO2 gas jet to facilitate the formation of precursor shock wave and accelerate flame speed in a methane-oxygen mixture is proposed in this study. Experimental results show two stages of pressure rise before detonation: slow deflagration stage with discrete shock waves, and fast deflagration stage where shock waves merge into precursor shock wave promoting detonation in shorter distance. Optimal injection conditions are determined to have prominent detonation-enhancement effects.
Article Energy & Fuels

Laminar Burning Velocities of Hydrogen-Blended Methane-Air and Natural Gas-Air Mixtures, Calculated from the Early Stage of p(t) Records in a Spherical Vessel

Maria Mitu et al.

Summary: The study investigates the effect of hydrogen addition on the laminar burning velocity of methane and natural gas mixtures, showing that hydrogen addition increases LBV and the variation in LBV becomes more significant with higher hydrogen fractions.

ENERGIES (2021)

Article Energy & Fuels

Effects of inert gas jet on the transition from deflagration to detonation in a stoichiometric methane-oxygen mixture

Jun Cheng et al.

Summary: This study investigates the effects of using inert gas (Argon) as a safe and controllable method in promoting the deflagration-to-detonation transition (DDT) process in a methane-oxygen mixture. Experimental and numerical results show that turbulence generated by the argon injection can enhance flame acceleration and detonation onset in the fast deflagration regime. The enhancing effect is more significant at higher turbulence intensity, while prolonged injection duration may have adverse effects on DDT occurrence.
Article Energy & Fuels

Numerical study on the minimum ignition energy of a methane-air mixture

Haitao Lu et al.

Summary: A semi-detailed mechanism was used to calculate the minimum ignition energy (MIE) of methane-air mixtures using ANSYS Fluent software in this paper. The effects of isothermal and adiabatic wall conditions, equivalence ratio, and electrode wall temperature on the MIE were numerically investigated, showing significant differences in MIE predictions. The numerical results were considered to be considerably more accurate for different equivalence ratios compared to previous studies.
Article Engineering, Aerospace

Ignition behavior and the onset of quasi-detonation in methane-oxygen using different end wall reflectors

Bo Zhang et al.

Summary: This study investigates the application of shock wave focusing technique in the development of detonation-based engines through experiments with different reflectors, revealing that conical reflectors can effectively enhance the formation and intensity of combustion waves, as well as shorten the ignition delay time.

AEROSPACE SCIENCE AND TECHNOLOGY (2021)

Article Chemistry, Physical

On the explosion characteristics for central and end-wall ignition in hydrogen-air mixtures: A comparative study

Tingkai Dai et al.

Summary: The experimental results demonstrate that central ignition is generally more hazardous than end-wall ignition, especially under quiescent conditions and lower initial pressure. Central ignition results in small energy loss and behaves similarly to an ideal constant volume explosion, while end-wall ignition consumes a large amount of explosive energy. Under turbulent conditions, the increase in jet pressure and jet time intensifies the explosion hazard of central ignition but restricts the explosion process of end-wall ignition.

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY (2021)

Article Engineering, Environmental

Inert gas influence on the laminar burning velocity of methane-air mixtures

Maria Mitu et al.

JOURNAL OF HAZARDOUS MATERIALS (2017)

Article Engineering, Chemical

Explosion pressure measurement of methane-air mixtures in different sizes of confinement

Manju Mittal

JOURNAL OF LOSS PREVENTION IN THE PROCESS INDUSTRIES (2017)

Article Engineering, Chemical

Propagation indices of methane-air explosions in closed vessels

Maria Mitu et al.

JOURNAL OF LOSS PREVENTION IN THE PROCESS INDUSTRIES (2017)

Proceedings Paper Thermodynamics

An overview on safety issues related to hydrogen and methane blend applications in domestic and industrial use

Livio de Santoli et al.

ATI 2017 - 72ND CONFERENCE OF THE ITALIAN THERMAL MACHINES ENGINEERING ASSOCIATION (2017)

Article Thermodynamics

Flame propagation of premixed liquefied petroleum gas explosion in a tube

Y. Huo et al.

APPLIED THERMAL ENGINEERING (2017)

Review Engineering, Chemical

A review on understanding explosions from methane-air mixture

Sazal Kundu et al.

JOURNAL OF LOSS PREVENTION IN THE PROCESS INDUSTRIES (2016)

Article Engineering, Chemical

Explosion and Flame Characteristics of Methane/Air Mixtures in a Large-Scale Vessel

Bo Zhang et al.

PROCESS SAFETY PROGRESS (2014)

Article Engineering, Chemical

Flow and flame visualization near the upper flammability limits of methane/air and propane/air mixtures at elevated pressures

Jenq-Renn Chen et al.

JOURNAL OF LOSS PREVENTION IN THE PROCESS INDUSTRIES (2011)

Article Thermodynamics

Measurement of laminar burning speeds and Markstein lengths using a novel methodology

Toni Tahtouh et al.

COMBUSTION AND FLAME (2009)

Article Thermodynamics

Experimental Studies of Explosions of Methane-Air Mixtures in a Constant Volume Chamber

M. Gieras et al.

COMBUSTION SCIENCE AND TECHNOLOGY (2009)

Article Engineering, Chemical

Influence of ignition position and obstacles on explosion development in methane-air mixture in closed vessels

J. Kindracki et al.

JOURNAL OF LOSS PREVENTION IN THE PROCESS INDUSTRIES (2007)

Article Chemistry, Physical

Laminar-buming velocities of hydrogen-air and hydrogen-methane-air mixtures: An experimental study

M. Ilbas et al.

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY (2006)

Article Engineering, Chemical

Determination of explosion parameters of methane-air mixtures in the chamber of 40 dm3 at normal and elevated temperature

M Gieras et al.

JOURNAL OF LOSS PREVENTION IN THE PROCESS INDUSTRIES (2006)

Article Engineering, Environmental

Determination of the explosion behaviour of methane and propene in air or oxygen at standard and elevated conditions

AA Pekalski et al.

PROCESS SAFETY AND ENVIRONMENTAL PROTECTION (2005)

Article Engineering, Chemical

On the determination of the laminar burning velocity from closed vessel gas explosions

AE Dahoe et al.

JOURNAL OF LOSS PREVENTION IN THE PROCESS INDUSTRIES (2003)