Experimental investigation of flame and pressure dynamics after spontaneous ignition in tube geometry |
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| Affiliation: | 1. Pro-Science GmbH, Ettlingen, Parkstr. 9, 76275, Germany;2. Karlsruhe Institute of Technology, IKET, Germany;1. Department of Mechanical Engineering, Aoyama Gakuin University, 5-10-1 Fuchinobe, Chuo, Sagamihara, Kanagawa 252-5258, Japan;2. Department of Machine Intelligence, Kyusyu Institute of Technology, 1-1 Sensui, Tobata, Kitakyusyu 804-8550, Japan;1. Institute for Nuclear and Energy Technologies, Karlsruhe Institute of Technology, Hermann-von-Helmholtz Platz 1, 76344 Eggenstein-Leopoldshafen, Germany;2. Pro-Science GmbH, Parkstrasse 9, 76275 Ettlingen, Germany;1. Pro-Science GmbH, Parkstr. 9, 76275 Ettlingen, Germany;2. Karlsruhe Institute of Technology (KIT), IKET, 76131 Karlsruhe, Germany |
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| Abstract: | Spontaneous ignition processes due to high pressure hydrogen releases into air are known phenomena. The sudden expansion of pressurized hydrogen into a pipe, filled with ambient air, can lead to a spontaneous ignition with a jet fire. This paper presents results of an experimental investigation of the visible flame propagation and pressure measurements in 4 mm extension tubes of up to 1 m length attached to a bulk vessel by a rupture disc. Transparent glass tubes for visual observation and shock wave pressure sensors are used in this study. The effect of the extension tube length on the development of a stable jet fire after a spontaneous ignition is discussed. |
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| Keywords: | Pressurized hydrogen Spontaneous ignition Miniature shock tube Jet fire |
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