Backlayering Distance of Thermal Fumes in Tunnel Fire Experiments Using a Large-Scale Model

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概要

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• In this study, the backlayering distance of thermal fumes in a tunnel fire was examined by using a large-scale model tunnel. A 1/5-scale model was constructed taking into consideration both the similarity of thermal characteristics in the wall and Froude similarity. Experimental parameters were the heat release rate of the fire source and the longitudinal ventilation velocity. The following conclusions were obtained. A new expression was proposed to calculate the dimensionless backlayering distance based on the dimensionless heat release rate and Froude number. Constants included in this expression were obtained from experimental data by using the least-squares method. The backlayering distance calculated by the new expression was compared with that calculated by previous expressions developed by other researchers. The new expression has the ability to calculate not only the backlayering distance but also the critical velocity.

著者

• Tanaka Futoshi

  Department Of Mechanical And Intellectual Systems Engineering Toyama University

• HASEGAWA Masato

  School of Mechanical Engineering, Kanazawa University

• KAWABATA Nobuyoshi

  School of Mechanical Engineering, Kanazawa University

• Minehiro Tomoya

  Graduate School of Natural Science and Technology, Kanazawa University

• Fujita Katsushi

  Department of Mechanical Engineering, Fukui National College of Technology

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• Temperature Characteristics of Backlayering Thermal Fumes in a Tunnel Fire
• Backlayering Distance of Thermal Fumes in Tunnel Fire Experiments Using a Large-Scale Model

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