Numerical study of hydrogen release accidents in a residential garage

Hajji, Yassine; Jouini, Belgacem; Bouteraa, Mourad; Elcafsi, Afif; Belghith, Abdelfettah; Bournot, Philippe

doi:10.1016/j.ijhydene.2015.06.050

Cited by 39 publications

(11 citation statements)

References 24 publications

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“…In the last two decades, due to the rapid development of the hydrogen economy and use of hydrogen technologies, several experimental and numerical studies (Chernyavsky et al 2011;Houf & Schefer 2008;Schefer et al 2008a,b;Xiao et al 2011) have investigated small-scale unintended hydrogen round jet release in ambient air, while others (Ekoto et al 2012;Houf et al 2013Houf et al , 2010Hajji et al 2015) studied different accidental hydrogen dispersion scenarios in enclosed and open spaces. There has also been extensive work done to describe the evolution of axisymmetric round turbulent jets in terms of selfsimilarity correlations, obtained from statistical analysis from both experiments (Lipari & Stansby 2011;Ball et al 2012) and simulations (M. Kaushik 2015).…”

Section: Introductionmentioning

confidence: 99%

Measurements of flow velocity and scalar concentration in turbulent multi-component jets: asymmetry and buoyancy effects

et al. 2020

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Buoyancy effects and nozzle geometry can have a significant impact on turbulent jet dispersion. This work was motivated by applications involving hydrogen. Using helium as an experimental proxy, buoyant horizontal jets issuing from a round orifice on the side wall of a circular tube were analysed experimentally using particle image velocimetry (PIV) and planar laser-induced fluorescence (PLIF) techniques simultaneously to provide instantaneous and time-averaged flow fields of velocity and concentration. Effects of buoyancy and asymmetry on the resulting flow structure were studied over a range of Reynolds numbers and gas densities. Significant differences were found between the centreline trajectory, spreading rate, and velocity decay of conventional horizontal round axisymmetric jets issuing through flat plates and the pipeline leak-representative jets considered in the present study. The realistic pipeline jets were always asymmetric and found to deflect about the jet axis in the near field. In the far field, it was found that the realistic pipeline leak geometry causes buoyancy effects to dominate much sooner than expected compared to horizontal round jets issuing through flat plates. † Email address for correspondence: majids@uvic.ca arXiv:1811.05580v1 [physics.flu-dyn]

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Section: Introductionmentioning

confidence: 99%

Measurements of flow velocity and scalar concentration in turbulent multi-component jets: asymmetry and buoyancy effects

et al. 2020

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“…For example, fundamental investigations on hydrogen dispersion and explosion predictions in simple geometries, like an enclosure or tunnel, have been carried out experimentally (e.g., [17][18][19][20][21][22][23], etc.) and with Computational Fluid Dynamics (CFD) (e.g., [24][25][26][27][28][29][30][31][32][33][34][35][36], etc.). Current research efforts, both experimental and computational, are starting more toward engineering aspects of real hydrogen vehicles and refueling station systems in practical environment and scenarios [37][38][39][40][41][42][43][44][45].…”

Section: Introductionmentioning

confidence: 99%

Assessment of similarity relations using helium for prediction of hydrogen dispersion and safety in an enclosure

Kokgil

Wang

et al. 2016

International Journal of Hydrogen Energy

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The ability to predict the concentration of hydrogen in a partially confined space is significant to the safe use of hydrogen-related products such as fuel cell vehicles. Hydrogen release and subsequent dispersion are frequently investigated using commercially-available computational fluid dynamic (CFD) models once those are calibrated with available experimental data. Due to the explosion safety concerns of using hydrogen, accidental scenarios are often replicated with helium as a hydrogen simulant in experiments. Currently, there is no validated, theoretical analogy to correlate the helium data in order to predict the spatial and temporal distribution of hydrogen in the enclosure. The aim of this paper is to assess different theoretical relationships for the similarity between hydrogen and helium leakage in an enclosure. Experiments were first carried out to obtain measured data with helium leakage in a set of scenarios and to validate the present CFD model. Three methods, namely equal volumetric flow rate, equal buoyancy and a newly proposed correlation derived from equal concentration, were employed to determine the equivalent hydrogen release rate, using which the validated CFD model was then used, with the physical property values for hydrogen, to stimulate hydrogen dispersion as compared to that of helium. The accuracy of these different methods at different stage of release and location is discussed. The present result thus provides a guide when using helium experiment to validate hydrogen simulation in different scenarios, which is of importance to the investigation of hydrogen safety.

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“…Considering the cost and uncontrollability of harmful gas leakage and diffusion experiments, the current main research method in this field is computational fluid dynamics (CFD) simulation [20][21][22][23]. In 2011, Tauseef et al [24] used data from the 26th experiment of Thorney Island in the United States to study the accuracy of various CFD turbulence models.…”

Section: Introductionmentioning

confidence: 99%

Study on Hazardous Areas of Hydrogen Fluoride Diffusion Based on CFD Simulation

Zhou

Zhang

et al. 2021

Processes

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Hydrogen fluoride (HF) is a typical dangerous gas in the fluorine chemical industry. Its leakage is one of the most common types of accidents in this industry, and it poses a serious threat to personnel safety and health, environmental sanitation, and social stability. In this paper, the process and consequences of an HF leakage accident in a fluorine chemical plant were simulated by using computational fluid dynamics (CFD) simulation software, and hazardous areas (lethal area, severe injury area, light injury area, and maximum allowable concentration area) of HF diffusion were determined according to the HF concentration corresponding to the degree of personal injury. Moreover, the effects of wind speed and height on hazardous areas were analyzed. The research results of this paper provide model support for similar enterprises to predict the consequences of harmful gas leakage accidents, and give suggestions on emergency evacuation and rescue work, which have practical application significance.

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Numerical study of hydrogen release accidents in a residential garage

Cited by 39 publications

References 24 publications

Measurements of flow velocity and scalar concentration in turbulent multi-component jets: asymmetry and buoyancy effects

Measurements of flow velocity and scalar concentration in turbulent multi-component jets: asymmetry and buoyancy effects

Assessment of similarity relations using helium for prediction of hydrogen dispersion and safety in an enclosure

Study on Hazardous Areas of Hydrogen Fluoride Diffusion Based on CFD Simulation

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