An Experimental Study on the Effect of Longitudinal Ventilation on the Variation of Burning Rate in Tunnel Fires

터널 화재시 종류식 환기가 연소율 변화에 미치는 영향에 관한 실험적 연구

  • Published : 2005.02.01

Abstract

In this study, the 1/20 reduced-scale experiments using Froude scaling were conducted to investigate the effect of longitudinal ventilation on the variation of burning rate in tunnel fires. The methanol square pool fires with heat release rate ranging from 3.57 kW to 10.95 kW were used. The burning rate of fuel was obtained by measured mass using load cell and temperature distribution were measured by K-type theomocouples in order to investigate smoke movement. The wind tunnel was connected with one side of the tested tunnel, and logitudinal ventilation velocity in the tested tunnel was controlled by power of the wind tunnel. In methanol fire case, the increase in ventilation velocity decreased the turning rate due to the direct cooling of fire plume. For the same dimensionless velocity(V), homing rate decreased as the size of pool fire increased.

Keywords

tunnel fire;longitudinal ventilation;froude scaling;pool fire;burning rate

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