Design of laser schlieren test system for mine gas/air premixed gas deflagration

Yang HU; Shang-xian YIN; J. Bjørn ARNTZEN; Jian-fang ZHU; Xue-bing LI

doi:10.3788/OPE.20192705.1045

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Design of laser schlieren test system for mine gas/air premixed gas deflagration

Modern Applied Optics | 更新时间：2020-08-13

- Design of laser schlieren test system for mine gas/air premixed gas deflagration
- Optics and Precision Engineering Vol. 27, Issue 5, Pages: 1045-1051(2019)
- 作者机构：
  
  1.华北科技学院安全工程学院，北京 101601
  2.卑尔根大学，挪威卑尔根 5020
- 作者简介：
- 基金信息：
- DOI：10.3788/OPE.20192705.1045
  CLC： O381
- Received：03 October 2018，
  
  Accepted：05 November 2018，
  
  Published：15 May 2019
- 稿件说明：
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Yang HU, Shang-xian YIN, J. Bjørn ARNTZEN, et al. Design of laser schlieren test system for mine gas/air premixed gas deflagration[J]. Optics and precision engineering, 2019, 27(5): 1045-1051.
DOI：

Yang HU, Shang-xian YIN, J. Bjørn ARNTZEN, et al. Design of laser schlieren test system for mine gas/air premixed gas deflagration[J]. Optics and precision engineering, 2019, 27(5): 1045-1051. DOI： 10.3788/OPE.20192705.1045.

摘要

为了准确地获取矿井瓦斯/空气预混气体爆燃流场的内部微观结构信息，能够从基元反应层面认识爆燃流场的演化过程以及惰性介质阻燃剂抑制作用的机理，在已经建成的中尺度激波管道上继续搭建高速激光纹影测试系统，结合实验室几何空间约束条件，提出纹影测试系统“Z”字型光路的设计方案。以激光纹影系统代替传统的压力火焰测试系统，将爆燃流场的研究重心从宏观的单一点源信息向微观的多重结构信息转化。研究表明，在60，100，125，212 ms时火焰阵面的化学反应变强，伴随着产生了冲击波，在75 ms左右火焰发生断裂，该点处的压力下降，325 ms火焰阵面扫过该测点以后，压力迅速下降。该结果为寻求预混气体爆燃高速摄影、压力火焰速度测试手段之外的方法提供了新的研究思路。

Abstract

To obtain accurate internal micro-structure information related to mine gas/air premixed gas deflagration flow fields

the evolutionary process of deflagration flow fields and the mechanism involved in inert medium flame retardant inhibition from the perspective of elementary reactions must be understood. A high-speed laser schlieren measurement system is constructed for the mesoscale shock pipeline. Due to the geometric space constraints in the laboratory

a design scheme of a Z-shaped optical path for the schlieren measurement system is also proposed. The laser schlieren system replaces the traditional pressure flame measurement system

and the research focus of deflagration flow fields is shifted from macroscopic single-source information to microscopic multi-structure information. The results show that the chemical reaction of the flame front becomes stronger at 60

100

125

and 212 ms when accompanied by a shock wave. The flame breaks at approximately 75 ms

and the pressure decreases at this point. After a 325-ms flame front sweeps over the measuring point

the pressure decreases rapidly. The results provide a basis for new research into methods other than high-speed photography for premixed gas deflagration and pressure flame velocity measurements.

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references

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