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(사)한국터널지하공간학회

ISSN : 2233-8292

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Vol.24 No.6

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CFD analysis of the effect of hydrogen jet flame in road tunnel

(사)한국터널지하공간학회 / (사)한국터널지하공간학회, (P)2233-8292; (E)2287-4747
2022, v.24 no.6, pp.629-636
https://doi.org/10.9711/KTAJ.2022.24.6.629



& (2022). CFD analysis of the effect of hydrogen jet flame in road tunnel. (사)한국터널지하공간학회, 24(6), 629-636, https://doi.org/10.9711/KTAJ.2022.24.6.629

Abstract

Domestic eco-friendly vehicles currently account for 5.8% of the total registered vehicles in Korea. Hydrogen vehicles, one of the representative eco-friendly vehicles, have grown rapidly as they have been expanded to the market based on the government’s policy to boost the hydrogen industry. Therefore, it is time to expand the safety review of hydrogen vehicles in various directions according to the increase in supply. In this study, the effect of internal heat damage was analyzed when a jet flame was generated by a hydrogen car in a road tunnel. It was simulated using Fluent, and the amount of jet flame injection was selected in consideration of the hydrogen tank capacity of commercial hydrogen vehicles for road tunnels. In addition, the study was conducted with the direction of the jet flame and the nozzle distance from the tunnel wall as variables. From the results, when the jet flame erupted in the road tunnel, high radiant heat emission of more than 20 kW/m2 was generated in most areas within ±5 m in the longitudinal direction based on the vehicle (spray nozzle) and 5 to 7 m in the lateral direction based on the adjacent tunnel wall.

keywords
수소차, 수소 제트 화염, 도로 터널, 반밀폐 공간, Fuel cell electric vehicle (FCEV), Hydrogen jet fire, Road tunnel, Semiclosed space

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