Abstract： The substitutability of ultrafine powder extinguishing agents was researched with the original structure and equipment of the experimental cabin. Based on the computational fluid dynamics and two-phase flow theory, the mathematic model combined with k-ε two equations turbulent model and particle trajectory model was developed to describe the discharge, flow and diffusion of ultrafine powder extinguishing agents in an experimental cabin. The discharge, flow and diffusion of ultrafine powders were simulated with the model in the experimental cabin. The detailed information of the flow field and ultrafine powders concentration distribution were obtained. The results show that the extinguishing agents are full submerged after discharging. The average concentration of ultrafine powder extinguishing agents in experimental cabin is higher than the required extinguishing concentration. Ultrafine powder extinguishing agents are able to replace Halon extinguishing agents without any change of the existing fire extinguishing system.

Keywords: ultrafine powder; extinguishing agent; gas-solid flow; numerical simulation

中图分类号：TQ 021.1            文献标志码：A

文章编号：1008-5548（2014）06-0017-05

DOI:10.13732/j.issn.1008-5548.2014.06.004

收稿日期：2014-02-28， 修回日期：2014-05-15，在线出版时间：2014-12-22。

基金项目：国家自然科学基金项目，编号：61371176；广东省自然科学基金项目，编号：S2013010013699。

第一作者简介：陆诚（1973—），男，工程师，研究方向为车辆消防与安全工程。 E-mail:zsyzlb@126.com。

通信作者简介：张立博（1989—），男，硕士研究生，研究方向为过程模拟与优化。 电话：010-89731773，E-mail:zhanglibo7@126.com。