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A Numerical Study for the Performance of Natural Smoke-venting of a Vertical Vent  

Jeon, Heung-Kyun (대구보건대학 소방안전관리과)
Choi, Young-Sang (대구보건대학 소방안전관리과)
Choo, Hong-Lok (대구보건대학 소방안전관리과)
Publication Information
Fire Science and Engineering / v.22, no.4, 2008 , pp. 1-10 More about this Journal
Abstract
In this study, the effects of vent location, outside temperature, wind velocity and fire size on the performance of natural venting of the vertical vent designed according to NFPA 204 standard and fire characteristics were numerically investigated using CFAST. In cases of the Vent located on most upper wall, lower outside temperature and lower wind velocity, vents met the performance criteria of venting. The larger fire size becomes, the more mass flow rate through a vent becomes, but the lower interface height of smoke layer becomes, so that vent didn't meet the performance criteria of venting. It should be noted that a natural vertical vent be designed considering maximum outside temperature and maximum wind velocity and developing a design fire accurately in order to meet the performance criteria of venting.
Keywords
natural venting; vertical vent; CFAST; performance criteria; design fire;
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