建筑物内火灾烟羽流和顶蓬射流诱发的空气运动盐水模拟实验研究

Experimental Study of Air Motion Induced by Smoke Plume and Ceiling Jet in a Burning Building by Means of Salt Water Modeling Method

盐水在清水中的扩散与火灾烟气在空气中的蔓延相似，因而可用盐水的扩散来模拟火灾烟气的蔓延；同样地，由于盐水的扩散而导致的环境清水的运动也可用来模拟烟气蔓延诱发的空气运动。基于这一原理，本文用实验的方法，研究了建筑物内初起火灾产生的烟羽流和顶蓬射流所诱发的空气运动，并对走廊空气层生长规律和运动特性进行了初步的测量和分析。所得结果基本合理，对建筑物通风排烟及疏散通道设计有帮助，从而为建筑火灾环境空气的运动的实验研究开辟了新的思路。

The diffusion of salt water in water is similar to the propagation of smoke in air.Therefore,it can be used to simulate the spread of smoke.Similarly,the movement of ambient water induced by the salt water can also be used to simulate the spread of air induced by the smoke.Accordingly,the air motion induced by smoke plume and ceiling jet during the initial stage of a building fire was studied experimently and both the motion properties and the growth law of air layer in a corridor were measured.The results are helpful to the design of ventilating system,smoke drainage and evacution passage.This experimental work may be regarded as a new approach to study the ambient air in a burning building and provided a foundation for fire zone modeling.