玉米粉火焰在开口垂直管道中的传播
Flame Propagation Through Cornstarch Dust Clouds in an Open Vertical Duct
查看参考文献17篇
文摘
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以对粉尘云状态参数的定量测定为基础,对玉米粉尘火焰在开口垂直管道中向上传播的过程进行了实验研究.在情形A中,火焰从管道的封闭端向开口端传播,在情形B中,从开口端向封闭端传播.实验中,观察到两种粉尘火焰,即湍流火焰和层流火焰,火焰形态转变对应的点火延迟时间约等于1.1s,即粉尘云湍流运动强度为10cm/s.情形A中,层流火焰的传播出现周期性振荡现象,湍流火焰在传播过程中不断加速;情形B中,两种火焰都匀速传播,湍流火焰传播速度明显大于层流火焰.在所考察的实验条件下,粉尘浓度对于玉米粉尘火焰传播速度的影响不大。 |
其他语种文摘
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Based on the quantitative determination of dust cloud parameters, the upward flame propagation through cornstarch dust clouds was investigated in an open vertical duct. Flames propagated from the closed end of the duct to the open end in case A, and from the open end to the closed end in case B. With the increase of ignition delay time, two different kinds of flame were observed in both cases : turbulent and laminar flames. The transition occurs when the ignition delay time is about 1.1 s, corresponding to a turbulence level of 10 cm/s. In case A, the propagation of laminar flames is periodically oscillatory, and the turbulent flame accelerates continuously. In case B, they all propagate with steady velocity, and the propagation velocity of turbulent flames is much higher than that of laminar flames. For the present experimental conditions, it is found that the flame propagation velocity is a weak function of dust concentration in cornstarch dust clouds. |
来源
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燃烧科学与技术
,2007,13(1):5-9 【核心库】
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关键词
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粉尘火焰
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火焰传播
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扬尘方法
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扬尘湍流
;
粉尘浓度
;
玉米粉
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地址
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中国科学院力学研究所, 国家微重力实验室, 北京, 100080
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语种
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中文 |
文献类型
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研究性论文 |
ISSN
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1006-8740 |
学科
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能源与动力工程 |
基金
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中国科学院知识创新工程项目
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文献收藏号
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CSCD:2755581
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参考文献 共
17
共1页
|
1.
Eckhoff R K.
Dust Explosion in the Process Industries.2nd ed,1997
|
被引
1
次
|
|
|
|
2.
Nagy J.
Development and Control of Dust Explosious,1983
|
被引
1
次
|
|
|
|
3.
Heazberg M. Explosives dust cloud combustion.
Proceedings of24th Sym-posium(International)on Combustion,1992:1837-1843
|
被引
1
次
|
|
|
|
4.
Goroshin S. Quenching distance of laminar flame in aluminum dust clouds.
Combustion and Flame,1996,105(1/2):147-160
|
被引
9
次
|
|
|
|
5.
Jarosinski J. Quenching distance of self-propagation dust-air flames.
Proceedings of 21st Symposium(International)on Combustion,1986:1917-1924
|
被引
1
次
|
|
|
|
6.
Proust C. Fundamental properties of flame propagating in starch dust-air mixtures.
Combustion Science and Technology,1988,62(4):149-172
|
被引
2
次
|
|
|
|
7.
Han O S. Behavior of flames propagating throush lycopodium dust clouds in a vertical duct.
Journal of Loss Prevention in the Process Industries,2000,13(6):449-457
|
被引
11
次
|
|
|
|
8.
Han O S. A study of flame propagation mechanisms in lycopodium dust clouds based on dust particles behavior.
Journal of Loss Prevention in the Process Industries,2001,14(3):153-160
|
被引
4
次
|
|
|
|
9.
Dreizin E L. Constant pressure flames of aluminum and aluminum-magnesium mechanical alloy aerosols in microgravity.
Combustion and Flame,2002,130(4):381-385
|
被引
7
次
|
|
|
|
10.
Sun J H. Concentration profile of particles across a flame propagating through an iron particle cloud.
Combustion and Flame,2003,134(4):381-387
|
被引
16
次
|
|
|
|
11.
Goroshin S. Laminar dust flames:a program of microgravity and ground based studies at McGill.
Proceedings of Fifth International Microgravity Combustion Workshop,1999:123-126
|
被引
1
次
|
|
|
|
12.
van Wingerden K. Measurements of the laminay burning velocities in dust-air mixtures.
VDI-Berichte 1272,1996:553-564
|
被引
1
次
|
|
|
|
13.
Eckhoff R K. Prevention and mitigation of dust explosions in the process industries:A survey of recent research and development.
Journal of Loss Prevention in the Process Industries,1996,9(1):3-20
|
被引
2
次
|
|
|
|
14.
Hinze J O.
Turbulence 2nd ed,1975
|
被引
1
次
|
|
|
|
15.
Pu Y K. The determination of turbulence parameters in closed explosion vessels.
Progress in Astronautics and Aeronautics,1989,132:107-123
|
被引
6
次
|
|
|
|
16.
胡俊. 粉尘等容燃烧容器内扬尘系统诱导湍流特性的实验研究.
实验力学,2000,15(3):341-348
|
被引
12
次
|
|
|
|
17.
Maykstein G H.
Nonsteady Flame Propagation,1964
|
被引
1
次
|
|
|
|
|