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http://dx.doi.org/10.3795/KSME-B.2004.28.12.1591

Effects of Spray Characteristics of Water Mist on The Extinction of a Liquid Pool Fire  

Kim, Ho-Young (고려대학교 기계공학과)
Oh, Sang-Youp (고려대학교 대학원 기계공학과)
Chung, Jin-Taek (고려대학교 기계공학과)
Publication Information
Transactions of the Korean Society of Mechanical Engineers B / v.28, no.12, 2004 , pp. 1591-1599 More about this Journal
Abstract
A series of experiments were conducted to study the effectiveness of the extinction of a liquid pool fire with two different water atomizing nozzles. Fire source is a small-scale circular stainless steel pan of 120mm in diameter with the fuels of hexane and ethanol. K-type thermocouples were used to measure the flame and fuel temperature along the pool centerline and under fuel surface. A digital camera was used to visualize the process of the fire suppression. The experimental results show that water mist droplet size is l15∼180${\mu}{\textrm}{m}$ with nozzle A and 130∼190${\mu}{\textrm}{m}$ with nozzle B. The extinguishing time of pool fire was reduced with the increase of pressure. When water droplets are small, they do not reach the flame base since they may be deflected or evaporated by the fire plume. However, influence of flow rate is more important than droplet size on fire extinction. Among the fire extinction mechanisms, drop of flame temperature is superior to suffocation of $O_2$ concentration.
Keywords
Extinguish Time; Fire Suppression; Pool Fire; Water Mist;
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Times Cited By KSCI : 4  (Citation Analysis)
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