抄録
The velocity and temperature of the smoke of fire flowing through out a corridor varry at the time going by. So far, the shutting characteristics of the air shutter for fire prevention at a constant temperature have been studied. Now investigating the buoyancy effect in higher temperature, the basic data for actual design are obtained. In experiment, a side flow of smoke which has high temperature attack against the air shutter.
The results are as follows:
(1) Total stored energy in an air shutter system formed by the push, the pull and the side flow is constant, though they vary in each other.
(2) The value of the break limit ratio of push-pull flow volume, (Q3 /Q1 ) limit, may be expressed as follows:
i) It is influenced not only by the value of push-pull distance ratio, H/E, and side flow velocity ratio, v0 /v1 , but also by the one of side flow temperature ratio, T0 /T1 .
ii) When side flow volume, Q0 , and side flow temperature, T0 , are constant, the values of (Q3 /Q1 ) limit in the case of uniform side velocity distribution have also the same values with the case of varied ones which have large at ceiling parts and small at floor parts.
