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논문 기본 정보

자료유형
학술대회자료
저자정보
Kim, Myung-Bae (Industrial Equipment Department, Korea Institute of Machinery & Materials) Han, Yong-Shik (Industrial Equipment Department, Korea Institute of Machinery & Materials) Park, Jun-Seok (Industrial Equipment Department, Korea Institute of Machinery & Materials)
저널정보
한국화재소방학회 한국화재소방학회 심포지움 및 세미나 한국화재소방학회 1997년도 International Symposium on Fire Science and Technology
발행연도
1997.1
수록면
464 - 471 (8page)

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Convective smoke spread in a corridor is experimentally investigated using thermocouples and visualization technique with a laser beam sheet. The speed of smoke front under a ceiling is measured by a series of thermocouples. Visualization of the ceiling jet formation and of smoke filling process is carried out to observe the lowering of a smoke layer. From the results, a large-scale convective motion plays dominant roles for smoke spread in the vicinity of the end of the corridor from visualized photos along with temperature records. The large-scale convective motion of the smoke is generated from the impingement of the ceiling jet front on the end of the corridor, and thus turning the flows toward the floor. Such a circulating motion of fluid transports some smoke to some region where its momentum is effective. It is therefore shown that the conventional concept of lowering smoke in the two-layer zone model has some restrictions for the corridor because the lowering of smoke layer has been thought to be mass transport due to relatively small scale motions such as the decrease of buoyancy, mass diffusion and momentum exchanges.

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