Experimental study on the flame radiation fraction of hydrogen and propane gas mixture

Gao, Yuke; Lu, Zhengkang; Hua, Yang; Liu, Yongqiang; Tao, Changfa; Gao, Wei

doi:10.1016/j.fuel.2022.125443

Cited by 17 publications

(6 citation statements)

References 41 publications

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“…The intensity of the blue flame is determined by the square of the hydroxyl (OH) concentration [32]. According to the equations of mass, momentum, and energy, the temperature difference distribution between the flame and ambient in the vertical direction of jet flames can be expressed as [10,33]:…”

Section: The Experimental Results and Discussionmentioning

confidence: 99%

“…According to the equations of mass, momentum, and energy, the temperature difference distribution between the flame and ambient in the vertical direction of jet flames can be expressed as [10,33]:…”

Section: The Experimental Results and Discussionmentioning

confidence: 99%

“…According to the virtual point model, the height can be revised to a more accurate value for the flame temperature. By replacing the height Z in the plume temperature formula with the corrected height [10,33], it can be obtained that: In the previous study, the temperature distribution in the plume region is analyzed by the virtual point source method [10,37]. The virtual point source can be explained as: there is a virtual point below or upon the real fire source which releases the combustion heat [37].…”

Section: Q *mentioning

confidence: 99%

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The Study of Hydrogen Volume Fraction Effects on the Flame Temperature of Turbulence Diffusion Propane Jet Flames

Yan,

Sun,

Feng

et al. 2023

Fire

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This paper studies the influence of hydrogen volume fraction effects on the temperature distribution of diffusion turbulent propane jet flames. Numbers of experimental scenarios have been carried out to investigate the evolution of temperature distribution under different hydrogen volume fractions. In the continuous region, these experimental results show that the temperature distribution and the maximum temperature of diffusion of turbulent jet flames are proportional to the hydrogen volume fraction under the same heat release rate of propane. Considering the model of virtual point source and the three-stage model, the theoretical model between the hydrogen volume fraction and flame temperature has been analyzed. The relationship among the temperature distribution, hydrogen volume fraction, and heat release rate has been modified. It can provide some important references for the fire risk assessment of turbulent diffusion jet flames.

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Section: The Experimental Results and Discussionmentioning

confidence: 99%

Section: The Experimental Results and Discussionmentioning

confidence: 99%

Section: Q *mentioning

confidence: 99%

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The Study of Hydrogen Volume Fraction Effects on the Flame Temperature of Turbulence Diffusion Propane Jet Flames

Yan,

Sun,

Feng

et al. 2023

Fire

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“…The slot is no longer a conventional flat leakage gap but a curved leakage gap similar to the actual pipeline. In this case, the jet in the pipeline crack will be deflected along the central axis of the jet, and an increase in the aspect ratio will result in a decrease in the deflection angle and axial concentration attenuation rate. , The characterization of subsonic jets in fuel cells involves multiple scales, ranging from the microscopic scale of the leakage gap to the macroscopic scale of the environmental domain. − Therefore, numerical simulation studies need to develop multiscale modeling techniques to better capture the details and global behavior of the jet.…”

Section: Hydrogen Jetmentioning

confidence: 99%

Comprehensive Review of Hydrogen Leakage in Relation to Fuel Cell Vehicles and Hydrogen Refueling Stations: Status, Challenges, and Future Prospects

Hu,

Gao,

Cheng

et al. 2024

Energy Fuels

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As fuel cell vehicles (FCVs) are increasingly put on the market and hydrogen refueling stations (HRSs) are built accordingly, fatal accidents caused by explosion due to hydrogen leakage are reported and have become a critical issue. The explosion results from complicated processes associated with the so-called hydrogen jet and diffusion when the hydrogen leaks from FCVs or HRSs, demonstrating its sophisticated characteristics and presenting significant technical challenges. Recently, particularly in the past a few years, researchers have established a variety of theoretical models to reveal the relevant mechanisms and introduced a series of monitoring/diagnostic approaches to detect and control the relevant hazards. This comprehensive review summarizes the major research outcomes and particularly the state-of-the-art progresses in relation to hydrogen leakage in FCVs and HRSs, including (1) subsonic jets, (2) underexpanded jets, (3) hydrogen diffusion behavior, (4) hazard reduction methods for confined and free spaces, (5) four types of widely used hydrogen detection technologies, and (6) the application of hydrogen leakage diagnostic methods in different systems. An insight of the review is that research on hydrogen leakage related to FCVs and HRSs should be combined with the relevant realistic characteristics. The characteristics of hydrogen jets generated in real gaps are discussed, and hazard reduction methods are proposed based on the characteristics of hydrogen diffusion in different confined and free spaces. It is suggested that, in order to integrate and evaluate multiple sensor data points and more accurately determine the leakage location and the leakage level, artificial intelligence technologies could be introduced to resolve the issues encountered currently.

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“…The radiation fraction was slightly affected. The activation energy of the C 3 H 8 /H 2 mixture tended to decrease rapidly [16].…”

Section: Introductionmentioning

confidence: 96%

Examination of combustion behaviors and emissions of hydrogen enriched propane/methane fuel under external acoustic application

Taştan,

Mutlu,

Çetintaş

2023

International Journal of Energy Studies

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In this study, the instability and emission changes of hydrogen-enriched methane-propane fuel under external acoustic application in a premixed and vortex assisted system were investigated. In the experiment, 67% -33% and 63,5% -31,5% -5% were studied under different acoustic stresses as fuel mixtures. It is known that hydrogen can reduce the emission parameters polluting the environment and its effect on combustion stability. For this reason, interest in the use of hydrogen fuel with other fuels has increased. It may be possible to improve the combustive performance properties of compatible methane and propane mixtures by adding hydrogen. Also, the effects of acoustic applications were examined. Addition of hydrogen to the methane/propane flame increased the heating value of the mixture and caused flame instability due to the increase in laminar flame velocity. There was an increase of 12.2% in light intensity. When the amount of hydrogen increased, the flame was more resistant to acoustic stress. High dynamic pressure fluctuations occurred with 90 Hz acoustic forcing. The emission capacity of the mixture to which hydrogen is added by acoustic forcing has consistently higher values. This was attributed to the change in reaction kinetics due to the increased content.

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Experimental study on the flame radiation fraction of hydrogen and propane gas mixture

Cited by 17 publications

References 41 publications

The Study of Hydrogen Volume Fraction Effects on the Flame Temperature of Turbulence Diffusion Propane Jet Flames

The Study of Hydrogen Volume Fraction Effects on the Flame Temperature of Turbulence Diffusion Propane Jet Flames

Comprehensive Review of Hydrogen Leakage in Relation to Fuel Cell Vehicles and Hydrogen Refueling Stations: Status, Challenges, and Future Prospects

Examination of combustion behaviors and emissions of hydrogen enriched propane/methane fuel under external acoustic application

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