机械排烟条件下建筑火灾烟流特性预测

Prediction of Smoke flow Property in Fire Building Using Mechanical Smoke Extraction

摘要:

阐述了基于网络模型的建筑物火灾烟流特性预测系统的研究背景，发掘了相关技术中存在的主要问题并作出改进.在原有的烟气流动网络模型基础上，对装有送风机或排风机的开口计算式进行改进，利用拟合出的计算式代替原有的负质量源计算式，实现网络模型装有机械排烟系统时烟流特性的联立求解.对重庆大学自主开发的烟气流动模拟软件进行改进后，可以实现建筑物在机械排烟时的火灾烟流特性模拟.

Abstract:

The research background of smoke flow property prediction system in fire building based on the network model was expounded. Then a major problem of concerned technology was found and solved. Based on the original network model of building fire smoke flow, the expressions related to opening installing ventilator were amended. The new expressions replaced the original negative mass expressions, and a solvable algebra equation set was obtained. Fire smoke flow property was calculated by the algebra equations set. Predicting software developed independently by Chongqing University for fire smoke flow property of high building was modified. As a result, smoke flow property in fire building using mechanical smoke extraction can be simulated.