主管：中华人民共和国应急管理部
主办：应急管理部天津消防研究所
ISSN 1009-0029  CN 12-1311/TU
消防科学与技术

消防科学与技术 ›› 2022, Vol. 41 ›› Issue (9): 1178-1182.

• • 上一篇    下一篇

微重力环境对层流射流扩散火焰形貌特征的影响

张单1,2，苑钧集1，姚浩伟1,2，李森1,2   

  1. （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）
  • 出版日期:2022-09-15 发布日期:2022-09-15
  • 作者简介:作者简介：张单(1987- )，女，河南长垣人，郑州轻工业大学建筑环境工程学院讲师，主要从事火灾探测及火场环境侦测技术研究，河南省郑州市中原区科学大道136号，450002。
  • 基金资助:
    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）

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

Zhang Dan1,2, Yuan Junji1, Yao Haowei1,2, Li Sen1,2   

  1. (1. School of Building Environment Engineering, Zhengzhou University of Light Industry, Henan Zhengzhou 450002, China; 2. Zhengzhou Key Laboratory of Electric Power Fire Safety, Henan Zhengzhou 450002, China)
  • Online:2022-09-15 Published:2022-09-15

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10-2~10-3 g，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。

关键词: 微重力, 射流, 层流扩散火焰, 火焰形貌

Abstract: 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 ~10-3 g. 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.

Key words: microgravity, jet flame, laminar diffusion flame, flame morphology