管道内两相流流型特征对预混式两相雾化特性的影响  

Influence of flow regime characteristics of two-phase flow in pipes on the atomization characteristics of premixed two-phase flow

作　　者：肖景洋 孙华中 杨勇 李刚 赵江月 王劲松 朱小龙 张平 XIAO Jingyang;SUN Huazhong;YANG Yong;LI Gang;ZHAO Jiangyue;WANG Jingsong;ZHU Xiaolong;ZHANG Ping(Shenyang 213 Electronic Technology Company Limited,Shenyang 110027,China;State Key Laboratory of Fire Science,University of Science and Technology of China,Hefei 230026,China;Fire Prevention and Supervision Unit of Songjiang District Firefighting and Rescue Brigade,Shanghai Fire and Rescue Corps,Shanghai 201620,China)

机构地区：[1]沈阳二一三电子科技有限公司,沈阳110027 [2]中国科学技术大学火灾科学国家重点实验室,合肥230026 [3]上海消防救援总队松江区消防救援支队,上海201620

出　　处：《火灾科学（中英文）》2024年第2期112-122,共11页Fire Safety Science

基　　金：中国科学技术大学学生创新创业和成果转化行动计划项目(CY2023G021)。

摘　　要：预混式两相流雾化方式应用于车载细水雾系统中时具有雾化效果好、雾化压力低的优势,但面临管道喘振、雾流量周期性波动的问题。基于沈阳地铁车载细水雾实际混合系统结构及工况参数,对管道内流型特征开展了实验和数值模拟研究,发现预混式两相细水雾系统中发生的喘振现象主要是因为混合流在管道内疏水过程中形成了段塞流和环状流。通过改变混合流的输送工况参数,可将混合流流型转变为均匀性较强的雾状流和气泡流。结合车载细水雾系统的实际运行工况和空间条件限制,指出通过降低输送管路直径的方法不仅可有效地解决现有系统的喘振问题,而且不影响现有系统的气、液消耗量及系统布置空间。The premixed two-phase flow atomization method offers advantages such as effective atomization and low atomization pressure when integrated into vehicle-mounted water mist systems.However,it encounters challenges like pipeline surges and periodic fluctuations in fog flow.This study focuses on the structure and operational parameters of an actual water mist mixing system in the Shenyang subway.Experimental and numerical simulations were conducted to analyze the flow characteristics within the pipeline.The research revealed that surge occurrences in the premixed two-phase water mist system primarily stemmed from slug flow and annular flow formed by the mixed flow during the drainage process in the pipeline.Altering the transport parameters of the mixed flow allowed for a transformation of the flow pattern from mixed flow to fog flow and bubble flow with greater uniformity.Considering the operational conditions and spatial limitations of the vehicle water mist system,this study suggests that the surge issue in the current system can be effectively resolved by decreasing the diameter of the conveying pipe.This adjustment does not affect the gas and liquid consumption levels or the system layout space of the existing system.

关 键 词：预混两相细水雾 车载细水雾 混合流 流型 地铁 

分 类 号：X932[环境科学与工程—安全科学]