[1]生迎夏,范宝春,归明月,等.抛物面聚焦激波点火研究[J].南京理工大学学报(自然科学版),2013,37(03):72.
 Sheng Yingxia,Fan Baochun,Gui Mingyue,et al.Ignition investigation by paraboloid focusing shock wave[J].Journal of Nanjing University of Science and Technology,2013,37(03):72.
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抛物面聚焦激波点火研究
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《南京理工大学学报》(自然科学版)[ISSN:1005-9830/CN:32-1397/N]

卷:
37卷
期数:
2013年03期
页码:
72
栏目:
出版日期:
2013-06-30

文章信息/Info

Title:
Ignition investigation by paraboloid focusing shock wave
作者:
生迎夏12范宝春1归明月1董 刚1
1.南京理工大学 瞬态物理国家重点实验室,江苏 南京 210094; 2.南京工业大学 城市建设与安全工程学院,江苏 南京 210009
Author(s):
Sheng Yingxia12Fan Baochun1Gui Mingyue1Dong Gang1
1.National Key Laboratory of Transient Physics,NUST,Nanjing 210094,China; (2.College of Urban Construction and Safety Engineering,Nanjing University of Technology, Nanjing 210009,China
关键词:
抛物面聚焦 激波 点火 乙炔 空气
Keywords:
paraboloid focusing shock waves ignition acetylene air
分类号:
O381
摘要:
为了研究物理破裂诱导火灾爆炸过程中的点火机理和改进超燃、爆震燃烧中的点火技术,将乙炔/空气可燃混合气体在59mm×59mm方形激波管内由抛物面聚焦激波进行点火实验。采用高速摄影技术对入射激波经过抛物面反射和聚焦的过程进行跟踪,得到反射激波聚焦的阴影图片以及聚焦点火的纹影照片。实验结果显示:当乙炔与空气的混合比处于理论化学当量比时,马赫数为2.1的聚焦激波能够引燃乙炔/空气的混合气体。火焰由抛物面反射后聚焦所形成的气体动力学焦点产生,且沿抛物面传播的速度最快。
Abstract:
To study the mechanism of ignition in the fire explosion process induced by physical rupture and improve the ignition technology in supersonic combustion or detonation combustion,the acetylene/air combustible gas mixture is ignited in a 59 mm×59 mm rectangular cross section shock tube induced by paraboloid focusing shock waves.The high-speed photography technology is applied to observe the process of the incident shock wave focusing and reflecting by the paraboloid.Shaded pictures of reflected shock wave focusing and schlieren photographs of focusing ignition are obtained.The results show that the combustible mixture of acetylene/air can be ignited by the focusing shock wave(Ma=2.1),if the acetylene/air blended near the theoretical chemical stoichiometric ratio.The flame is generated at the gas dynamics focus formed by the paraboloid reflection and focusing,and the spread speed of the flame is the fastest along the paraboloid.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期:2013-02-15 修回日期:2013-05-13
基金项目:国家自然科学基金(10472047)
作者简介:生迎夏(1975-),男,博士生,讲师,主要研究方向:流体力学、工业安全,E-mail:njutsafety@163.com; 通讯作者:范宝春(1945-),男,教授,博士生导师,主要研究方向:流体力学,E-mail:njustfbc@163.com。
更新日期/Last Update: 2013-03-25