微重力环境对层流射流扩散火焰形貌特征的影响  

Research on the influence of microgravity environment on the morphological characteristics of laminar jet diffusion flames

作　　者：张单 苑钧集 姚浩伟 李森 Zhang Dan;Yuan Junji;Yao Haowei;Li Sen(School of Building Environment Engineering,Zhengzhou University of Light Industry,Henan Zhengzhou 450002,China;Zhengzhou Key Laboratory of Electric Power Fire Safety,Henan Zhengzhou 450002,China)

机构地区：[1]郑州轻工业大学建筑环境工程学院,河南郑州450002 [2]郑州市电力电气消防安全重点实验室,河南郑州450002

出　　处：《消防科学与技术》2022年第9期1178-1182,共5页Fire Science and Technology

基　　金：国家自然科学基金青年基金(51804278);河南省科技攻关(212102310385);郑州轻工业大学博士科研基金(2014BSJJ021)。

摘　　要：研究微重力环境下层流射流扩散火焰的形貌特征,可为航天领域中火灾探测的研究提供理论支持。本文首先选取可控的层流射流扩散火焰,对火焰炭黑特性及其对火焰温度和热辐射的影响进行了理论分析。其次,在国家微重力实验室落塔设备中进行实验,微重力水平可达10~10g,实验结果表明,微重力环境下随着伴流空气速度增大火焰亮度增大,火焰辐射分数降低,火焰温度升高,同时火焰内高温区位于火焰两翼处。Research on the influence of microgravity environment on the morphological characteristics of laminar jet diffusion flames,can provide theoretical support for fire detection in aerospace research.Firstly,the controllable laminar jet diffusion flames were selected to analyze the characteristics of flame soot and the influence of flame soot on the flame temperature and thermal radiation.Secondly,the microgravity experiment was conducted in the drop tower facility of the National Microgravity Laboratory of China to obtain microgravity level of 10-2~10-3g.The experimental results showed that flame brightness increased with coflow velocity increasing,the flame radiation fraction decreased with coflow velocity increasing,and as the flame temperature increased,the high temperature zone in the flame was located on the two wings of the flame.

关 键 词：微重力 射流 层流扩散火焰 火焰形貌 

分 类 号：X913.4[环境科学与工程—安全科学]