空气幕防烟效果研究现状及展望
Current status and prospects of research on smoke prevention effects of air curtains
摘要：
鉴于空气幕优良的防烟性能,本文基于目前国内外对于空气幕的研究成果,从空气幕流场结构、空气幕防烟性能、空气幕特性参数、传统防排烟技术与空气幕耦合防烟4个方面介绍了空气幕防烟的研究现状,分析了空气幕的流场结构与空气幕的射流轨迹,得到了造成烟气渗漏的主要原因;对比了评估空气幕防烟性能的方法,认为挡烟动量比是评估空气幕防烟性能普适性较好的参量;总结了对空气幕射流特性参数的研究,得到了空气幕特性参数的确定方法;分析了传统防烟设施对空气幕防烟性能的影响,得到了空气幕与传统防排烟设施耦合防烟时的布置方法。分析了当前研究存在的不足,希望以此为空气幕防烟的设计与研究提供参考。
Abstract：
In view of the excellent smoke prevention performance of air curtains, this paper presents the research status of air curtain smoke prevention based on the research results on air curtains at home and abroad from four aspects: flow field structure, smoke prevention performance, characteristic parameters, and coupling smoke prevention of traditional smoke prevention and exhaust technology with air curtains. The flow field structure and the jet trajectory of air curtains are analysed, and the main causes of smoke leakage are identified. After comparing the methods for evaluating the smoke prevention performance of air curtains, it is believed that the smoke blocking momentum ratio is a parameter with better universality in evaluating the smoke prevention performance of air curtains. By summarizing the research on the characteristic parameters of air curtain jets, the method for determining the characteristic parameters of air curtains is obtained. The impact of traditional smoke prevention facilities on the smoke prevention performance of air curtains is analysed, and the layout method of coupling smoke prevention and exhaust facilities with air curtains is obtained. The shortcomings of current research are analysed, hoping to provide a reference for the design and research of air curtain smoke prevention.
Keywords:air curtain; flow field structure; smoke prevention performance; jet velocity; jet angle; jet thickness; coupling smoke prevention