Hazard analysis on tunnel hydrogen jet fire based on CFD simulation of temperature field and concentration field

Gu, Xiaochen; Zhang, Jiandu; Pan, Yong; Ni, Yuqing; Ma, Congming; Zhou, Wei; Wang, Yuanyuan

doi:10.1016/j.ssci.2019.104532

Cited by 73 publications

(14 citation statements)

References 25 publications

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“…[8] Over the years, researchers have utilized FDS to model both large-and small-scale fires for varying purposes, and this has proven to show reasonable accuracy. [13][14][15][16][17]…”

Section: Fds Numerical Modelingmentioning

confidence: 99%

Thermal Response of Steel–Steel Composite Metal Foams under Small‐Scale Torch‐Fire Conditions

Amoafo-Yeboah

Rabiei

2023

Adv Eng Mater

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Steel–steel composite metal foam (S–S CMF) is a novel metal matrix composite material characterized by its high strength‐to‐weight ratio and unique mechanical and thermal properties. It is made up of hollow stainless‐steel spheres, embedded in stainless steel matrix, with 65–70% air in the structure making it effective as an insulating material. S–S CMF is being explored for use in tank cars carrying hazardous materials (HAZMATs) as a potential partial replacement for conventional carbon steel and thermal insulating material currently being used. In this study, S–S CMF material is numerically and experimentally evaluated for its thermal protection performance. Experimental studies are conducted in scaled‐down jet fire condition while numerical studies are conducted using fire dynamics simulator (FDS). Based on experimental and modeling results, as well as uncertainty studies, 13–15 mm thick S–S CMF ranging in density of about 2.5 g cc−1 tested as novel structural/insulating material meets the acceptance criterion for small‐scale simulated torch‐fire testing. Further success is anticipated in future full‐scale evaluation of 122 × 122 cm samples. The outstanding fire resistance and thermal protection of S–S CMF is attributed to the substantial volume of air trapped within the material, which correlates to its total density.

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“…[8] Over the years, researchers have utilized FDS to model both large-and small-scale fires for varying purposes, and this has proven to show reasonable accuracy. [13][14][15][16][17]…”

Section: Fds Numerical Modelingmentioning

confidence: 99%

Thermal Response of Steel–Steel Composite Metal Foams under Small‐Scale Torch‐Fire Conditions

Amoafo-Yeboah

Rabiei

2023

Adv Eng Mater

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“…When there is no information, the tunnel walls were modeled usually as "default", and in most CFD programs such default setting means the adiabatic boundary conditions. This even applies to manuscripts where the temperature distribution caused by fire was considered [9,10]. Similarly, Kim considered the effect of the tunnel slope on plug-holing phenomenon.…”

Section: Modeling Of Tunnel Wallsmentioning

confidence: 99%

“…Meanwhile, analyzes often ignore the effect of wind on the flows inside the tunnel. Simply, a specific flow velocity in the tunnel is assumed, without specifying whether this velocity results only from the operation of fans or also from the influence of the external wind [9]. Sometimes researchers consciously assume that the pressure inlet at the tunnel portal is 0 Pa.…”

Section: Impact Of the External Windmentioning

confidence: 99%

Some Tips on Numerical Modeling of Airflow and Fires in Road Tunnels

Król

2021

Energies

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The efficiency of tunnels systems is often evaluated using numerical simulations. This concerns both to normal and emergency mode of tunnel systems operation. Therefore the safety level of tunnel users may depend on the quality of numerical models being built. The most often studied areas cover the researches on natural and forced airflows in the normal mode and on fire development and smoke spreading in the emergency mode as well as modeling of fan operation. Thus, many software packages implementing Computational Fluid Dynamics (CFD) are applied here. Despite the available software is recognized as reliable, the problem arises because the built numerical models should be validated at least partially with experimental data. There is a shortage of experimental data from real tunnels due to high costs and many organizational or formal difficulties. Some researchers use data from scaled experiments, but this leads to problems connected with scaling. The paper presents the application of two widely used software packages—Fire Dynamics Simulator (FDS) and ANSYS Fluent to reproduce some scenarios of the operation of a tunnel ventilation system for normal and emergency mode. Most of results were compared with data obtained by own full scale measurements or data available in literature. Some practical issues concerning the application of FDS and ANSYS Fluent were discussed as well.

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“…Wang 23 achieved a good agreement between the simulation and experimental results based on the studies about influences of ventilation velocity and fire size on the smoke propagation. Moreover, the smoke movement, [24][25][26] smoke layer stratification, 12,27 temperature distribution, 28 and velocity field characteristics of ventilation 29,30 in road tunnel fires were also investigated successfully by FDS. These previous studies have proved the capabilities of FDS to simulate the road tunnel fire with high accuracy and reliability.…”

Section: Introductionmentioning

confidence: 99%

Numerical investigation on the characteristics of lateral smoke extraction in the immersed road tunnel

et al. 2022

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Hazard analysis on tunnel hydrogen jet fire based on CFD simulation of temperature field and concentration field

Cited by 73 publications

References 25 publications

Thermal Response of Steel–Steel Composite Metal Foams under Small‐Scale Torch‐Fire Conditions

Thermal Response of Steel–Steel Composite Metal Foams under Small‐Scale Torch‐Fire Conditions

Some Tips on Numerical Modeling of Airflow and Fires in Road Tunnels

Numerical investigation on the characteristics of lateral smoke extraction in the immersed road tunnel

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