کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
526691 869192 2008 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Assessment of the impact of jet flame hazard from hydrogen cars in road tunnels
موضوعات مرتبط
مهندسی و علوم پایه مهندسی کامپیوتر نرم افزارهای علوم کامپیوتر
پیش نمایش صفحه اول مقاله
Assessment of the impact of jet flame hazard from hydrogen cars in road tunnels
چکیده انگلیسی

Underground tunnels form an important part of modern road transportation systems. As the development of hydrogen cars advances into the market place, it is unavoidable that in the near future that hydrogen cars will become users of ordinary road tunnels. This paper discusses potential fire scenarios and fire hazards of hydrogen cars in road tunnels and implications on fire safety measures and ventilation systems in existing tunnels. Hydrogen has a low ignition energy, and wide flammable range suggesting that leaks have a high probability of ignition and result in hydrogen flame. Computational fluid dynamics (CFD) simulations of hydrogen jet flame in a full scale 5 m by 5 m square cross-section tunnel were carried out. The effect of the ventilation on controlling the upstream backlayering and the downstream flame were discussed. The results showed that the impact of a hydrogen flame in the tunnel depended on the hydrogen release rate. The tunnel ventilation system could eliminate the upstream backlayering and fully control downstream flame with a smaller hydrogen release rate. For a larger hydrogen release, the tunnel ventilation system could not provide sufficient air flow into the fire and there is an oxygen deficit hydrogen layer accumulating under the ceiling downstream of the fire. The accumulating hydrogen layer could pose a more serious hazard inside the tunnel.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Transportation Research Part C: Emerging Technologies - Volume 16, Issue 2, April 2008, Pages 246–254
نویسندگان
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