激波诱导火焰失稳与爆轰的条件研究

朱跃进; 于蕾; 张彭岗; 潘振华; 潘剑锋; 董刚

doi:10.11883/1001-1455(2017)04-0741-07

激波诱导火焰失稳与爆轰的条件研究

doi: 10.11883/1001-1455(2017)04-0741-07

朱跃进^{1, 2,},
于蕾¹,
张彭岗¹,
潘振华¹,
潘剑锋¹,
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 11402102

国家自然科学基金项目 11372140

江苏省自然科学基金青年项目 BK20140524

江苏省博士后基金项目 1402013B

江苏大学高级专业人才科研启动基金项目 14JDG031

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: O381
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- 被引次数: 17
出版历程
- 收稿日期: 2015-12-23
- 修回日期: 2016-05-03
- 刊出日期: 2017-07-25

Conditions for shock wave induced flame instability and detonation

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: 采用九阶WENO和十阶中心差分格式数值求解激波与火焰作用过程，考察了激波强度、火焰尺寸对激波与球形火焰作用过程的影响。结果表明，增大激波强度或火焰尺寸均可在流场中引发爆轰，但激波强度的影响更大，并且其引发的爆轰可使火焰迅速膨胀，放热率提高，从而影响燃烧特性；此外，爆轰波传播过程中会迅速消耗可燃预混气，合并原有的反射激波，并在流场中形成局部高压区，极大地改变流场结构。
- 激波 /
- 火焰 /
- 爆轰 /
- 流场结构
Abstract: A computational study of the interaction between shock waves and a spherical flame was carried out using the ninth-order WENO and the tenth-order central difference schemes, and the influence of shock intensity and flame size on the interaction process was investigated. It can be found from the results of our study that the increase of the shock intensity and the flame size can both induce detonation in the flow field, but the influence of the shock intensity is relatively stronger. Further, the detonation induced by shock wave can lead to quick flame expansion and increase its heat release rate, thereby affecting the combustion characteristics. Besides, the detonation wave will quickly burn out the combustible gas, merge the previously existing reflected shock waves in the propagation process, and form local high pressure zones, which can significantly alter the flow field structure.
- shock wave /
- flame /
- detonation /
- flow field structure

HTML全文

图 1 计算区域示意图

Figure 1. Sketch of computational domain

下载: 全尺寸图片幻灯片

图 2 实验纹影^[4]与计算密度的比较

Figure 2. Comparison between experimental schlieren images^[4] and computational density images at selected times

下载: 全尺寸图片幻灯片

图 3 计算密度(Case 2)

Figure 3. Computational density images (Case 2)

下载: 全尺寸图片幻灯片

图 4 计算密度与质量分数(Case 3)

Figure 4. Images of computational density and mass fraction (Case 3)

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图 5 计算密度与质量分数(Case 5)

Figure 5. Images of computational density and mass fraction (Case 5)

下载: 全尺寸图片幻灯片

图 6 火焰有效面积随时间的变化

Figure 6. Time histories of flame effective area

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图 7 火焰平均反应放热率随时间的变化

Figure 7. Time histories of average reaction heat release rate

下载: 全尺寸图片幻灯片

表 1 不同激波马赫数和火焰尺寸的4组算例

Table 1. Four cases with different shock Mach numbers and flame sizes

算例	Ma	R₀/m
Case 1	1.7	0.019
Case 2	2.1	0.019
Case 3	2.5	0.019
Case 4	1.7	0.024
Case 5	2.1	0.024
Case 6	2.5	0.024

下载: 导出CSV

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