Experimental and numerical investigation on premixed H2/air combustion

Liu, Yinhe; Zhang, Yun; Liu, Xiaoqian; Liu, Ziyu; Che, Defu

doi:10.1016/j.ijhydene.2016.01.049

Cited by 17 publications

(5 citation statements)

References 29 publications

(20 reference statements)

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“…First, a validation based on a lab-scale experiment of which the complete geometric details are given in Liu et al (2016). In addition, to the author's knowledge, there is rarely available labscale experiments measuring flame front position of hydrogen-air mixtures and the understanding of flame front propagation is necessary for the establishment of numerical models (Xiao et al, 2012).…”

Section: Model Validationmentioning

confidence: 99%

“…In this paper, the geometry model considered is the same as the one studied experimentally by Liu et al (2016). The labscale experimental setup for hydrogen/air combustion is shown in Figure 3.…”

Section: Experimental Workmentioning

confidence: 99%

“…To validate the global mechanism (C hydrogen > 20%), the simulation of flame front positions using the global mechanism versus the detailed model (Marinov et al, 1995) was conducted over a large range of concentrations in the container with the same geometric as Liu's experiments (Liu et al, 2016). Figure 7 shows the comparison of flame front positions and flame temperature between the global mechanism and detailed model.…”

Section: Model Validationmentioning

confidence: 99%

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Numerical Simulation of Hydrogen Combustion: Global Reaction Model and Validation

Zhang

Liu

2017

Front. Energy Res.

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Due to the complexity of modeling the combustion process in nuclear power plants, the global mechanisms are preferred for numerical simulation. To quickly perform the highly resolved simulations with limited processing resources of large-scale hydrogen combustion, a method based on thermal theory was developed to obtain kinetic parameters of global reaction mechanism of hydrogen-air combustion in a wide range. The calculated kinetic parameters at lower hydrogen concentration (C hydrogen < 20%) were validated against the results obtained from experimental measurements in a container and combustion test facility. In addition, the numerical data by the global mechanism (C hydrogen > 20%) were compared with the results by detailed mechanism. Good agreement between the model prediction and the experimental data was achieved, and the comparison between simulation results by the detailed mechanism and the global reaction mechanism show that the present calculated global mechanism has excellent predictable capabilities for a wide range of hydrogen-air mixtures.

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Section: Model Validationmentioning

confidence: 99%

Section: Experimental Workmentioning

confidence: 99%

Section: Model Validationmentioning

confidence: 99%

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Numerical Simulation of Hydrogen Combustion: Global Reaction Model and Validation

Zhang

Liu

2017

Front. Energy Res.

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“…One of the basic reactions (according to refs − ), occurring during ignition of volatile products of pyrolysis of the water–coal fuel, is the oxidation of hydrogen (H 2 ), one of the components of volatile. In this case, the kinetics of the interaction of hydrogen with oxygen can be described by one global reaction …”

Section: Introductionmentioning

confidence: 99%

Choice of the Kinetic Scheme of Oxidation Reactions of the Gaseous Products of Coal Pyrolysis during Induction Period at Ignition of the Water–Coal Fuel Particles

et al. 2019

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A theoretical analysis of the conditions and ignition of a drop of water−carbon fuel has been carried out. A mathematical model of the ignition process has been developed, which is characterized by well-known descriptions of the processes of interaction of gaseous combustible (volatile) and oxidative (air) components near the surface of the drop (and after the particle drying). The analysis of the influence of the kinetic scheme of the process of thermochemical reaction and oxidation on the main characteristics of the ignition of drops of water−carbon fuel (ignition delay timet ign ) has been carried out. The comparison of the experimental and theoretical values has shown their good correspondence. The experiments have been carried out on the facility that provides the conditions adequate to the characteristic zones of the steam and hot water boilers. According to the results of mathematical modeling, the prognostic potential of two significantly different kinetic models of oxidation of the main gaseous combustible components of pyrolysis products (carbon monoxide CO, hydrogen H 2 , and methane CH 4 ) has been analyzed. It has been established that the one-stage model of volatile ignition describes the ignition process quite well in the induction period. The deviations in the ignition delay times obtained in the framework of two different kinetic models do not exceed 5% over the entire range of variations in the heating conditions possible in practice. The results of numerical simulation show that taking into account the multistage nature of gas-phase ignition reactions of water−coal fuel particles (oxidation of hydrogen, methane, and carbon monoxide with air oxygen) does not lead to significant (in the practice of fuel combustion processes) changes in ignition delay times.

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“…Recently, CFD has been extensively used to simulate and validate combustion models. For example, Y. Liu et al [6] presented an experimental and numerical investigation of premixed hydrogen/air mixtures in a closed container. The authors studied the effect of initial temperature, hydrogen concentration and steam content on the flame propagation, peak pressure and the final temperature.…”

Section: Introductionmentioning

confidence: 99%

CFD simulations of premixed hydrogen combustion using the Eddy Dissipation and the Turbulent Flame Closure models

Halouane

Dehbi

2017

International Journal of Hydrogen Energy

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This paper presents a CFD simulation of premixed combustion tests, and centers around a comparison between the classical Eddy Dissipation Model (EDM) and the more sophisticated Turbulent Flame Closure (TFC) model. The chosen tests relate to hydrogen-air deflagration experiments in the THAI and ENACCEF facilities, featuring respectively slow and fast dynamics. Validation of the models is accomplished by comparing model predictions against important measured combustion parameters (flame velocity and spatial propagation, pressure history, spectra, etc.). We follow CFD Best Practice Guidelines, in particular by conducting systematic mesh and time-step sensitivity studies. Both default models predict combustion evolution reasonably well in all tests studied. For the ENACCEF dual compartment experiments, the flame propagation features several dynamical phases, and the TFC model using the progress variable approach reproduces better than the EDM the flame velocity evolution, which leads to better estimation of the temporal gradient of pressure. The better performance of the TFC model comes however at the expense of a larger computational effort, i.e. larger meshes and smaller time steps. This observed trend in 2D geometries is likely to be enhanced in 3D settings.

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Experimental and numerical investigation on premixed H2/air combustion

Cited by 17 publications

References 29 publications

Numerical Simulation of Hydrogen Combustion: Global Reaction Model and Validation

Numerical Simulation of Hydrogen Combustion: Global Reaction Model and Validation

Choice of the Kinetic Scheme of Oxidation Reactions of the Gaseous Products of Coal Pyrolysis during Induction Period at Ignition of the Water–Coal Fuel Particles

CFD simulations of premixed hydrogen combustion using the Eddy Dissipation and the Turbulent Flame Closure models

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