Heat Transfer Process of Ethanol Pool Fire Under Different Ventilation Conditions in Tunnel

doi:10.12068/j.issn.1005-3026.2017.10.025

Journal of Northeastern University Natural Science ›› 2017, Vol. 38 ›› Issue (10): 1491-1495.DOI: 10.12068/j.issn.1005-3026.2017.10.025

• Resources & Civil Engineering • Previous Articles Next Articles

Heat Transfer Process of Ethanol Pool Fire Under Different Ventilation Conditions in Tunnel

ZHANG Pei-hong¹， DONG Jia-bin¹， MENG Qi¹， ZHANG Yun-li²

1. School of Resources & Civil Engineering， Northeastern University， Shenyang 110819， China; 2. Department of Municipal and Environmental Engineering， Shenyang Urban Construction University， Shenyang 110168， China.

Received:2017-01-11 Revised:2017-01-11 Online:2017-10-15 Published:2017-10-13
Contact: ZHANG Pei-hong
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Abstract

Abstract: To analyze the effect of various ventilation modes on heat transfer process of pool fire， fire tests in 0.5m diameter ethanol pool were conducted in the tunnel model. Mass loss rate of fire source， fire temperature field， radiation and convection heat flux of flame were measured and analyzed. The results showed that 0.5m/s longitudinal smoke discharge plays a negative role in the control of fire heat transfer process， the radiant heat flux of persistent flame at the developed stage of fire is 30% bigger than that under natural ventilation condition. Under 0.8，1m/s longitudinal smoke discharge conditions， the radiant heat flux of the persistent flame and the upper smoke layer temperature decreased significantly at the developed stage of fire. 0.5m/s top smoke discharge mode significantly reduced the radiant heat flux of persistent flame， in which fire precedes into the strong stage at the latest and into the decay stage earlier. 0.5m/s top smoke discharge is the most premium ventilation mode.

Key words: pool fire, top smoke discharge, longitudinal smoke discharge, radiation heat flux, smoke temperature

CLC Number:

TK121

ZHANG Pei-hong， DONG Jia-bin， MENG Qi， ZHANG Yun-li. Heat Transfer Process of Ethanol Pool Fire Under Different Ventilation Conditions in Tunnel[J]. Journal of Northeastern University Natural Science, 2017, 38(10): 1491-1495.

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Heat Transfer Process of Ethanol Pool Fire Under Different Ventilation Conditions in Tunnel

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