中庭建筑天井内火灾烟气运动特性的盐水实验模拟

SALT WATER SIMULATION FOR THE FIRE SMOKE MOVEMENT IN AN ATRIUM BUILDING

本文运用盐水实验模拟方法研究了中庭建筑天井内的火灾烟气运动特性，实验模拟了天井内的烟气流态，即烟气羽流和并存的烟气环流，并定性分析了环流产生的机理。通过理论分析和实验结果，推导了天井内的羽流速度和决定环流起始方向的判据。同时，通过研究天井结构和侧室源强对流态的影响。

Salt water simulation was used to study the movement characteristics of smoke in an atrium building. Both the buoyant plume and the circulation patterns were observed by the technique. The mechanism for the formation of the circulation was analyzed. Based on the analysis of the experimental results, the plume velocity was deduced, and a criteria for determining the initial direction of the circulation plume was given. The maximum atrium height at which the circulation has not yet occur was estimated by studying the effects of the enclosure structure and the source energy on the flow pattern in the atrium.