期刊
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
卷 43, 期 45, 页码 21142-21148出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2018.09.074
关键词
Vented explosion; Duct length; Hydrogen; Overpressure; Flame; Pressure wave
资金
- National Key Research and Development Program of China [2016YFE0113400]
- HySEA Project through the European Commission's Fuel Cells and Hydrogen 2 Joint Undertaking [671461]
- National Natural Science Foundation of China [51741402]
- Open Fund of State Key Laboratory of Fire Science of China [HZ2017-KF04]
- H2020 Societal Challenges Programme [671461] Funding Source: H2020 Societal Challenges Programme
Experiments on duct-vented explosions of hydrogen-air mixtures in a 12.3 1 cylindrical vessel were conducted, and the effects of duct length and hydrogen concentration on the maximum overpressure and flame behavior within and outside the vented enclosure were investigated. The results show that the maximum overpressure in the vessel first increased and then was maintained nearly unchanged with the length of a relief duct increasing to 2 m. For a given duct length, the maximum overpressure first increased and then decreased when hydrogen concentration increased from 20% to 55%. The burn-up in the duct caused the gas mixtures to move in reverse from the duct to vessel, which consequently decreased the venting efficiency. A pressure wave caused by burn-up in the duct was observed, which resulted in a pressure peak in the external pressure-time histories after it traveled outside the duct. The maximum external overpressure first increased and then decreased with an increase in duct length. For a given duct length, the maximum external overpressure increased with an increase in hydrogen concentration. (C) 2018 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
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