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Effects of Ventilation Condition on the Fire Characteristics in Compartment Fires (Part II: Multi-dimensional Fire Dynamics)  

Kim, Jong-Hyun (한국승강기대학 메카트로닉스과)
Ko, Gwon-Hyun (동양대학교 건축소방행정학과)
Park, Chung-Hwa (대전대학교 소방방재학과)
Hwang, Cheol-Hong (대전대학교 소방방재학과)
Publication Information
Fire Science and Engineering / v.24, no.5, 2010 , pp. 32-38 More about this Journal
Abstract
Multi-dimensional fire dynamics were studied numerically with the change in ventilation conditions in a full-scale ISO 9705 room. Fire Dynamic Simulator (FDS) was used for the identical conditions conducted in previous experiments. Flow rate and doorway width were changed to create over-ventilated fire (OVF) and under-ventilated fire (UVF). From the numerical simulation, it was found that the internal flow pattern rotated in the opposite direction for the UVF relative to the OVF so that a portion of products recirculated to the inside of compartment. Significant change in flow pattern with ventilation conditions may affect changes in the complex process of CO and soot formation inside the compartment due to increase in the residence time of high-temperature products. The fire behavior in the UVF created complex 3D characteristics of species distribution as well as thermal and flow structures. In particular, additional burning near the side wall inside the compartment significantly affected the flow pattern and CO production. The distribution of CO inside the compartment was explained with 3D $O_2$ distribution and flow patterns. It was observed that gas sampling at local positions in the upper layer were insufficient to completely characterize the internal structure of the compartment fire.
Keywords
Compartment fire; FDS (Fire Dynamic Simulator); Ventilation condition; Fire dynamics; CO(Carbon monoxide);
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
연도 인용수 순위
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