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障碍物分布对受限空间内超细干粉灭火剂流动特性的影响

LI Quanwei LIU Qingshan WANG Ya GE Hui WU Dan TANG Lulin

沈阳航空航天大学学报2025，Vol.42Issue(6)：78-88,11.

沈阳航空航天大学学报2025，Vol.42Issue(6)：78-88,11.DOI:10.3969/j.issn.2095-1248.2025.06.010

障碍物分布对受限空间内超细干粉灭火剂流动特性的影响

The influence of obstacle distribution on the flow characteristics of ultrafine dry powder extinguishing agent in confined space

LI Quanwei ¹LIU Qingshan ²WANG Ya ³GE Hui ²WU Dan ²TANG Lulin²

作者信息

1. Key Laboratory of Civil Aviation Thermal Hazards Prevention and Emergency Response,Civil Aviation University of China,Tianjin 300300,China||School of Safety Science and Engineering(school of emergency management),Nanjing University of Science and Technology,Nanjing 210094,China
2. School of Safety Science and Engineering(school of emergency management),Nanjing University of Science and Technology,Nanjing 210094,China
3. China Explosive Materials Trade Association,Beijing 100089,China
折叠

摘要

Abstract

In order to study the influence of obstacle distribution on the flow characteristics of ultrafine dry powder fire extinguishing agent in confined space,a fluent software was used to establish a two-dimensional transient simulation model of gas-solid two-phase flow in the confined space after the release of ultrafine dry powder extinguishing agent,and the spatial flow characteristics of ultrafine dry powder were simulated under the conditions of different layers of obstacles and spatial locations.The results show that both the layer number and distribution of obstacles have a more significant influence on the spatial flow and distribution of ultrafine dry powder.In the early stage of spraying,the concentration of the area under the middle obstacle is significantly lower than that of the other obstacles,while the side obstacles have a more significant influence on the time required to reach the fully submerged fire extinguishing agent in the space.The number of layers of obstacles has a significant influence on the total flooding state of ultrafine dry powder fire extinguishing agent,single-layer obstacles to a certain extent is conducive to speeding up the confined space to achieve the state of total flooding of fire extinguishing agent,while multi-layer obstacles is just the opposite,and with the increase in the number of layers of obstacles,the longer the time required to reach the state of total flooding.

关键词

超细干粉/空间流动/障碍物分布/气-固两相流/浓度分布

Key words

ultrafine dry powder/spatial flow/obstacle distribution/gas-solid two-phase flow/concentration distribution

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引用本文复制引用

LI Quanwei,LIU Qingshan,WANG Ya,GE Hui,WU Dan,TANG Lulin..障碍物分布对受限空间内超细干粉灭火剂流动特性的影响[J].沈阳航空航天大学学报,2025,42(6):78-88,11.

基金项目

国家重点研发计划(项目编号:2023YFC3010202-1) （项目编号:2023YFC3010202-1）

中国民航大学民航热灾害防控与应急重点实验室开放基金(项目编号:RZH2022-KF-02). （项目编号:RZH2022-KF-02）

沈阳航空航天大学学报

ISSN：2095-1248

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