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정인수(I. S. Jung),이영규(Y. G. Lee),이창효(C. H. Lee),정희택(H. T. Chung) 한국동력기계공학회 2009 한국동력기계공학회 학술대회 논문집 Vol.2009 No.6
In the present study, numerical simulation has been performed to investigate the flow characteristics around the injecting nozzles which are the key parts of water mist fire suppression system. In the water mist fire suppression system (WMFSS), the fine mist droplets smaller than 1,000μmissued from the water mist nozzles suppress the fire plume by the direct cooling, oxygen displacement and attenuation of thermal radiation. For simulation of flow characteristics, the commercial CFD software, named as CFX and FLUENT, were used with the proper modeling. CFX was applied for analyzing the internal flow and FLUENT was applied for analyzing the external flow of water mist nozzles. The flow characteristics of the water mist nozzle found out in this study could be used for predicting the performance of the water mist nozzles for the fire suppression system.
정인수(I. S. Jung),이영규(Y. G. Lee),한용식(Y. S. Han),김종진(J. J. Kim),정희택(H. T. Chung) 한국동력기계공학회 2008 한국동력기계공학회 학술대회 논문집 Vol.2008 No.11
In the present study, the numerical simulation has been performed to predict the performance of the fire suppression system for cabin of shipboard enclosure. The open numerical code was used for the present simulation named as FDS(Fir Dynamic Simulator). Application has been done to predict the interaction between water mist and fire plume. In this study, the passenger cabin was chosen as simulation space. The computational domains for simulation in the passenger cabin were considered the fire scenario of IMO rules. The full scale of the flow field is W×L×H=4×3×2.4 ㎥ with a dead zone of W×L×H=1.22×1.1×2.4 ㎥. The water mist nozzle is installed in ceiling center or z.3m height from the floor, and there are six mattresses and four cushions in the simulation space. The five types of nozzle cluster were simulated in the study. Numerical results showed that C2-type is the most effective on fire suppressing.