一个端部开口短管气体爆燃外场火焰传播模型

杜扬; 齐圣; 李国庆; 王世茂; 李阳超

doi:10.11883/bzycj-2017-0060

一个端部开口短管气体爆燃外场火焰传播模型

doi: 10.11883/bzycj-2017-0060

杜扬^{1, 2},
齐圣^{1, 2, ,},
李国庆^{1, 2},
王世茂^{1, 2},
李阳超^{1, 2}

1.
中国人民解放军陆军勤务学院油料系, 重庆 401331
2.
中国人民解放军陆军勤务学院火灾爆炸与安全防护重庆市重点实验室, 重庆 401331

基金项目:

国家自然科学基金项目 51276195

重庆市研究生创新项目 CYB15127

详细信息

作者简介:
杜扬(1958-), 博士, 教授, 博士生导师

通讯作者:
齐圣, qscups@163.com

中图分类号: O381
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- 被引次数: 0
出版历程
- 收稿日期: 2017-02-22
- 修回日期: 2017-05-17
- 刊出日期: 2018-09-25

A model of gaseous deflagration flame propagation outside the open end of a short duct

DU Yang^{1, 2},
QI Sheng^{1, 2
, ,},
LI Guoqing^{1, 2},
WANG Shimao^{1, 2},
LI Yangchao^{1, 2}

1.
Department of Oil, Army Logistics University of PLA, Chongqing 401331, China
2.
Chongqing Key Laboratory of Fire and Explosion Safety, Army Logistics University of PLA, Chongqing 401331, China

摘要

摘要: 针对端部开口短管气体爆燃火焰传播问题，通过借鉴Clanet等和Bychkov等提出的火焰传播模型，在假设绝热、不可压缩的条件下，得到了可燃气体分布与火焰锋面传播的数学模型。以汽油蒸气为实验工质，在全透明实验管道上进行了爆燃实验。通过高速摄影及纹影图像，对所提出的模型进行了验证。结果表明，该模型能够较准确地预测长径比4：1至10：1的端部开口短管气体爆燃外场可燃气体界面与火焰锋面位置。上述成果在可燃气防爆安全领域具有一定应用价值。
- 汽油蒸气 /
- 爆燃 /
- 火焰锋面 /
- 开口管道
Abstract: Aiming at the flame propagation problem of gas deflagration in a short tube with one end closed and the other end open, by referring to the flame propagation model proposed by Clanet, et al and Bychkov, et al, and under the condition of adiabatic and incompressible assumption, a mathematical model of flammable gas distribution and flame front propagation was obtained. By using gasoline vapor as experimental working substance, deflagration experiment was carried out based on a fully transparent experimental pipeline. The proposed model was validated by high-speed photography and schlieren images. Results show that under the condition of length-diameter ratios 4:1 to 10:1, this model can predict accurately the flammable gas interface position and flame front position in the flow field outside the open end. Above results extend the original theory to outside field calculation, and have certain application value in flammable gas explosion protection and safety design.
- gasoline vapor /
- deflagration /
- flame front /
- duct with an open end

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图 1 实验系统示意图

Figure 1. Scheme of the experimental system

下载: 全尺寸图片幻灯片

图 2 爆燃火焰高速摄影与纹影图像

Figure 2. High-speed images of deflagration flame propagation

下载: 全尺寸图片幻灯片

图 3 爆燃火焰纹影图像

Figure 3. Schlieren photos of deflagration flame propagation

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图 4 指形火焰几何特征示意图^[2]

Figure 4. Sketch of the finger-shaped flame^[2]

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图 5 已燃区域与可燃气体分布示意图

Figure 5. Sketches and schlieren images of the burnt area and the flammable gas cloud

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图 6 火焰传播至外场阶段几何特征示意图

Figure 6. Sketch of the flame behavior during the outflow stage

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图 7 轴向火焰锋面与未燃气体界面计算结果与实验结果对比

Figure 7. Comparison of calculated and experimental results of the axial flame front and unburnt gas interface

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图 8 不同长径比下轴向火焰锋面位置计算结果与实验结果

Figure 8. Calculated and experimental results of the axial flame front and unburnt gas interface at different aspect ratios

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参考文献(15)

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