Temperature Stratification of Heated Air Flow in a Fire Tunnel
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概要
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The temperature stratification of the heated air flow in a fire tunnel is investigated using the two- and three-dimensional experiments along with numerical models described in previous papers. It is found that the heated air flow can appear to be either a stratified or a mixed flow pattern in accordance with different ventilation velocities, heat release rates, and downstream positions. To deal with tunnel fire circumstances, the mixed convection is evaluated using a nondimensional variable Gγ^*/Re^<5/2>_H. A quantitative relationship between Gγ^*/Re^<5/2>_H and a parameter which quantifies the varying degrees of the stratification at each tunnel cross section was established. By comparing the results from two- and three-dimensional analyses, the effects of secondary flow on the temperature stratification are discussed. The conclusions obtained are directly related to the safety considerations in tunnel fires.
- 一般社団法人日本機械学会の論文
- 1994-02-15
著者
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XUE Hong
Department of Physiology, Basic Medical College, Capital Medical University
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Saito T
Research Institute Of Science And Engineering Waseda University
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Xue Hong
Institute Of Materia Medica Chinese Academy Of Medical Sciences
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Xue Hong
Department Of Civil Engineering National University Of Singapore
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Hihara Eiji
Department of Mechanical Engineering, The University of Tokyo
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Saito Takamoto
Department of Mechanical Engineering, The University of Tokyo
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Hihara Eiji
Department Of Mechanical Engineering The University Of Tokyo
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Hihara Eiji
Department Of Environmental Studies The University Of Tokyo
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Saito Takamoto
Department Of Mechanical Engineering Meisei University
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