水平方向に細長い空間における火源近傍性状およびプリューム性状

概要

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Experiments were conducted to understand the effects of a confined space and ventilation on properties of plume and near field of fire sources using 3 types of model tunnels. The first one is a scaled tunnel with square and/or arched cross-section of 0.09 m^2 with length of ranging from 0.9 to 23m. The second one is, reinforced concrete tunnel, of 0.6m wide, 1.8m high and 12.8m long. The last one is a full-scaled tunnel of the cross sectional area of 5.4 m^2 with arched shape and 400m long. Temperatures in the near field of flame and plume were measured changing the bulk ventilation velocity. Estimation on maximum temperature and its position that appears in the down-flow region and beneath the ceiling under forced ventilation were modeled, and also modeling on the correlation for the critical velocity was deduced. Froude modeling was utilized on the relations between the excess temperature and/or upward velocity along the plume axis under natural ventilation condition and that is compared with results obtained in the free boundary condition.
社団法人日本建築学会の論文
2001-08-30