环形方管道中爆轰胞格的三维研究

归明月; 范宝春; 张辉

doi:10.11883/1001-1455(2016)05-0577-06

环形方管道中爆轰胞格的三维研究

doi: 10.11883/1001-1455(2016)05-0577-06

归明月^{1, 2,},
范宝春¹,
张辉¹

1.
南京理工大学瞬态物理重点实验室, 江苏南京 210094
2.
北京理工大学爆炸科学与技术国家重点实验室, 北京 100081

基金项目:

国家自然科学基金项目 11202104

爆炸科学与技术国家重点实验室(北京理工大学)开放基金项目 KFJJ13-3M

详细信息

作者简介:
归明月(1977—)，男，博士，副研究员, mygui@njust.edu.cn

中图分类号: O382
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- 被引次数: 4
出版历程
- 收稿日期: 2015-03-24
- 修回日期: 2015-09-07
- 刊出日期: 2016-09-25

Three-dimensional study of detonation cell in annular tube

1.
Laboratory of Transient Physics, Nanjing University of Science and Technology, Nanjing 210094, Jiangsu, China
2.
State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, China

摘要

摘要: 通过实验和三维数值模拟研究了爆轰波在环形管道内的传播。实验采用烟迹板记录了爆轰波的胞格结构。数值模拟基于带化学反应的三维Euler方程，采用五阶精度的WENO格式捕捉激波，采用具有TVD性质的三阶Runge-Kutta法处理时间项，并结合并行技术，对爆轰波的传播进行了数值研究。结果表明，环形管道外壁为收敛壁面，由于其对流场的压缩效应，外壁面及附近的胞格较小，且较均匀。而内壁为发散壁面，其对流场起稀疏效应，内壁面及附近的胞格较大，且呈周期性变化。同时, 不同壁面的胞格结构均出现了拍波(slapping wave)，其形状呈弯曲的折线。
- 爆炸力学 /
- 自持传播 /
- 三维数值模拟 /
- 爆轰胞格 /
- 环形管道
Abstract: In this work we carried out experimental and 3D numerical study of cellular structure of detonation propagating in an annular tube. Detonation cellular patterns were recorded using a smoked foil. Based on the 3D reactive Euler equations with the one-step irreversible Arrhenius kinetics model, detonation propagation of hydrogen/air mixture in an annular tube was investigated numerically. Fifth-order weighted essentially non-oscillatory (WENO) scheme and third-order TVD Runge-Kutta were used to discretize the spatial derivatives and the time term, respectively. Moreover, parallel technology was also adopted. The results indicate that the outer wall of the annular tube is the convergent wall, which reduces the cell sizes of the outer wall and makes it more uniform due to its compression. However, the inner wall of the annular tube is the divergent wall, which enlarges the cell sizes of the inner wall and leads to its periodical variation due to its expansion. Simultaneously, slapping waves appear in all the tube walls and its shape is a bent line.
- mechanics of explosion /
- self-sustained propagation /
- three-dimensional simulation /
- detonation cell /
- annular tube

HTML全文

图 1 实验装置图

Figure 1. Experimental setup

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图 2 环形管道计算示意图

Figure 2. Schematic of computational domain in an annular tube

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图 3 爆轰波ZND结构中的化学反应度分布图

Figure 3. Reaction progress distribution in ZND detonation structure

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图 4 环形管道顶部的爆轰胞格结构

Figure 4. Cellular structure of detonation on top wall of annular tube

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图 5 环形管道内爆轰波的三维胞格结构

Figure 5. 3D cellular structure of detonation in annular tube

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图 6 环形管道内的爆轰胞格结构(爆轰波从左往右传播)

Figure 6. Cellular structure of detonation in an annular tube (detonation propagation from left to right)

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施引文献

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