激波冲击火焰的涡量特性研究

朱跃进; 董刚

doi:10.11883/1001-1455(2015)06-0839-07

激波冲击火焰的涡量特性研究

doi: 10.11883/1001-1455(2015)06-0839-07

朱跃进^{1, 2,},
董刚²

1.
江苏大学能源与动力工程学院, 江苏镇江 212013
2.
南京理工大学瞬态物理重点实验室, 江苏南京 210094

基金项目: 国家自然科学基金项目(11372140, 11402102);江苏省自然科学基金青年项目(BK20140524);江苏大学高级专业人才科研启动基金项目(14JDG031);江苏省博士后基金项目(1402013B)

详细信息

作者简介:
朱跃进(1986—), 男, 博士, 讲师, zyjwind@163.com

中图分类号: O382
计量
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- 被引次数: 0
出版历程
- 收稿日期: 2014-04-29
- 修回日期: 2014-08-21
- 刊出日期: 2015-12-10

A study of vorticity characteristics of shock-flame interaction

Zhu Yue-jin^{1, 2
,},
Dong Gang²

1.
School of Energy and Power Engineering, Jiangsu University, Zhenjiang 212013, Jiangsu, China
2.
Key Laboratory of Transient Physics, Nanjing University of Science and Technology, Nanjing 210094, Jiangsu, China

摘要

摘要: 激波冲击火焰的现象涉及一系列复杂的物理化学过程，其中涡量的生成与演化对控制火焰发展起重要作用。为系统分析激波冲击火焰过程中的涡量特性，采用二维带化学反应的Navier-Stokes方程对平面入射激波及其反射激波与球形火焰作用的现象进行了数值研究，通过引入并行计算达到高网格分辨率的要求。计算结果表明，斜压项对火焰区内涡量生成起主导作用，压缩项和耗散项在火焰膨胀阶段抑制涡量生成，此外，火焰在激波压缩阶段主要受物理过程而非化学反应过程影响。
- 爆炸力学 /
- 涡量 /
- Navier-Stokes方程 /
- 火焰 /
- 激波 /
- 斜压项
Abstract: The phenomenon of shock wave interacting with a flame involves a series of complicated physical and chemical processes, in which the generation and evolution of vorticity play an important role in controlling flame development. To systematically analyze the vorticity characteristics in the course of shock-flame interaction, a numerical study of a planar incident shock wave and its reflected wave interaction with a spherical flame was carried out by using the two-dimensional Navier-Stokes equations coupled with chemical reaction, and the requirement of high-resolution grid was met via the parallel computation. It is found that the baroclinic term plays a dominant role in the generation of vorticity within the flame zone, and the compression and dissipation terms restrain the generation of vorticity in the flame expanding stages. Besides, in the compression stages, the evolution of flame is mainly affected by the physical-rather than chemical-process.
- mechanics of explosion /
- vorticity /
- Navier-Stokes equations /
- flame /
- shock wave /
- baroclinic term

HTML全文

图 1 计算区域和初始流场示意图

Figure 1. Computational domain and initial flow field

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图 2 流场分区示意图

Figure 2. Schematic of flow field block

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图 3 激波距点火位置距离、火焰界面宽度和高度计算结果(曲线)与实验结果(符号)^[5]的对比

Figure 3. Comparisons between calculated (curves) and experimental results (symbols)^[5]about distance between shock wave and ignitor, height and width of deformed flame

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图 4 火焰区涡量变化

Figure 4. Vorticity variation of the flame zone

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图 5 火焰区内各输运项绝对值之和随时间的变化

Figure 5. Time histories of the sum of absolute values for per transport term within flame region

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图 6 火焰区内各输运项正负值之和随时间的变化

Figure 6. Time histories of the sum of positive and negative values for per transport term within flame zone

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图 7 火焰区内斜压项最大值和最小值随时间的变化

Figure 7. Time histories of max and min values of baroclinic term within flame zone

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图 8 火焰区内环量随时间的变化

Figure 8. Time histories of circulation

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表 1 火焰区域内的环量计算结果

Table 1. Calculated results of circulation within flame region

激波运行阶段 Γ/(m²·s^-1)

PB YKZ 本文结果

入射阶段 20.37 8.79 10.81

反射阶段 9.60 9.63

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