| 方形管内楔形障碍物对火焰结构与传播的影响 |
| |
| 引用本文： | 陈志华,叶经方,范宝春,姜孝海,归明月.方形管内楔形障碍物对火焰结构与传播的影响[J].爆炸与冲击,2006,26(3):208-213. |
| |
| 作者姓名： | 陈志华 叶经方 范宝春 姜孝海 归明月 |
| |
| 作者单位： | 1.南京理工大学瞬态物理国家重点实验室，江苏 南京 210094 |
| |
| 基金项目： | 爆炸灾害预防、控制国家重点实验室开放基金项目(KFJJ03-3)，国家重点基础研究专项基金项目(2001CB409600) |
| |
| 摘 要： | 通过实验与数值模拟方法对CH4/空气预混火焰在有楔形障碍物的卧式燃烧方管内的传播进行了研究。采用多镜头Cranz Schardin高速摄像机和压力传感器等实验设备获得了高清晰度的障碍物诱导火焰失稳的分幅时序照片以及障碍物背风表面压力变化曲线。数值模拟则基于RANS方法与EDU-Arrhenius燃烧模型，计算结果与实验结果基本相符，反映了火焰在管内传播与变形的详细过程。通过综合分析实验与计算结果，得到了由楔形障碍物导致的火焰加速与变形的内在机理，揭示了火焰传播过程中由层流燃烧向湍流燃烧转捩的本质。
|
| 关 键 词： | 爆炸力学 火焰传播 火焰结构 楔形障碍物 |
| 文章编号： | 1001-1455(2006)03-0208-06 |
| 收稿时间： | 03 2 2005 12:00AM |
| 修稿时间： | 07 4 2005 12:00AM |
Effects of a wedge obstacle on flame propagation and its structure |
| |
| CHEN Zhi-hua,YE Jing-fang,FAN Bao-chun,JIANG Xiao-hai,GUI Ming-yue.Effects of a wedge obstacle on flame propagation and its structure[J].Explosion and Shock Waves,2006,26(3):208-213. |
| |
| Authors: | CHEN Zhi-hua YE Jing-fang FAN Bao-chun JIANG Xiao-hai GUI Ming-yue |
| |
| Affiliation: | 1.National Key Laboratory of Transient Physics, Nanjing University of Science & Technology, Nanjing 210094, Jiangsu, China |
| |
| Abstract: | Experimental and numerical investigations have been performed on the CH_(4)/Air mixture premixed flame propagation in a horizontal rectangle tube with a wedge obstacle mounted at the bottom.The multiple-lens,Cranz & Schardin high speed video system and pressure transducer etc experimental equipment has been adopted to visualize the interaction between the wedge block and flame and measure the flow parameters.Sequences of high-speed images with high definition showing the process of a flame losing its stability under the action of the wedge obstacle and pressure history on the backside of the obstacle have also been gained.Besides,based on RANS method and EBU-Arrhenius combustion model,a numerical simulation has been carried for simulating the above complex physical phenomenon.Both experimental and numerical results are in good agreement,which showed the inherent mechanism of flame acceleration and its front distortion,as well as the nature of a transition from laminar combustion to turbulence during its propagation. |
| |
| Keywords: | mechanics of explosion flame propagation flame structure wedge obstacles |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
| 点击此处可从《爆炸与冲击》浏览原始摘要信息 |
|
点击此处可从《爆炸与冲击》下载全文 |
