A Study on Smoke Behavior in a Compartment with Sprinkler System Activation -Simple Predictive Method on Mass Flow Rates Based on Experimental Study-

Fire Science and Technology

Yoshifumi Ohmiya²  Yuta Kuwana²  Jun-ichi Yamaguchi³  Mitsuru Ota²  Ken Matsuyama¹ 

[1] Center for Fire Science and Technology, Tokyo University of Science, Japan;Department of Architecture, Tokyo University of Science, Japan;Technical Research Institute, Obayashi Corporation, Japan

关键词: Smoke;    Sprinkler System;    Two-Layer Zone Model;    Mass Flow Rate;    Gas Analysis;   

DOI  :  10.3210/fst.28.88

学科分类：环境科学（综合）

来源: Tokyo University of Science * Center for Fire Science and Technology for Building

【 摘 要 】

References(9)Cited-By(1)Sprinklers generate a flow of downward moving gases from smoke in the upper layer of a two-layer zone within a compartment. It is necessary to determine quantitatively the flow of downward-moving gases and fire plume in order to calculate smoke behavior in a compartment with sprinkler activation. As a first, this study proposes a measurement technique of mass flow rate based on the gas analysis method since it is difficult to understand through conventional methods. Experiments were conducted on a full scale and the following results were obtained; 1) the mass flow rate of the fire plume grows with sprinkler activation and a flow of downward-moving gases grows as the heat release rate decreases and the amount of sprinkler supplied water increases. 2) A relation between the ratios of the mass flow rate penetrated to lower layer by water droplets to the mass flow rate of watering supply from SP, and of the upper (smoke) layer and the lower layer. As a result, the mass flow rate penetrated to lower layer can be computed when the mass flow rate of watering supply from SP and temperature at the smoke and lower layers are known.

【 授权许可】

Unknown