The influence of flow and turbulence on flame propagation through dust-air mixtures

被引：19

作者：

Krause, U ^{[1
]}

Kasch, T ^{[1
]}

机构：

[1] Fed Inst Mat Res & Testing BAM, Lab 2 12, D-12200 Berlin, Germany

来源：

JOURNAL OF LOSS PREVENTION IN THE PROCESS INDUSTRIES | 2000年 / 13卷 / 3-5期

关键词：

dust-air mixtures; flame propagation; turbulence; numerical modelling; explosion venting;

D O I：

10.1016/S0950-4230(99)00062-5

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Dust explosions are time-dependent flame propagation processes. Their description with "lumped parameter models" like the K-St value are of Limited validity only. More evidence of the process of flame propagation may be expected from an investigation of the flame velocity being composed by the laminar and turbulent velocities and the flow velocity. In the present paper the influences of the dust concentration and the flow velocity have been investigated by experiments in tube apparatus of three different diameters showing the dominating influence of the flow velocity and the turbulent rms velocity on the flame propagation. In addition, laminar and turbulent flame propagation has been investigated by an appropriate numerical model. Furthermore flow structures and particle distributions have been computed in a real size grain silo to assess the effects of possible explosions. (C) 2000 Elsevier Science Ltd. All rights reserved.

引用

页码：291 / 298

页数：8

共 50 条

[21] MODEL FOR FLAME PROPAGATION IN LOW VOLATILE COAL DUST AIR MIXTURES
KRAZINSKI, JL
BUCKIUS, RO
KRIER, H
[J]. JOURNAL OF HEAT TRANSFER-TRANSACTIONS OF THE ASME, 1978, 100 (01): : 105 - 111
[22] Effect of airflow characteristics on flame structure for following lycopodium dust-air mixtures in a long horizontal tube
Gao, Wei
Shuntaro, Abe
Rong, Jian-Zhong
Ritsu, Dobashi
[J]. Baozha Yu Chongji/Explosion and Shock Waves, 2015, 35 (03): : 372 - 379
[23] SUPPRESSION OF DUST-AIR MIXTURES EXPLOSIONS BY MEANS OF WATER SPRAY
Oleszczak, P.
Klemens, R.
[J]. INTERNATIONAL JOURNAL OF ENERGETIC MATERIALS AND CHEMICAL PROPULSION, 2007, 6 (05) : 589 - 607
[24] EXPERIMENTAL STUDIES ON THE INFLUENCE OF MIXTURE TURBULENCE ON THE FLAME PROPAGATION RATE IN DEFLAGRATING FUEL GAS AIR MIXTURES
CHRISTILL, M
LEUCKEL, W
[J]. CHEMIE INGENIEUR TECHNIK, 1989, 61 (02) : 174 - 175
[25] Effects of radiation on propagating spherical flames of dust-air mixtures
Bidabadi, Mehdi
Azad, Abazar Vandat
[J]. POWDER TECHNOLOGY, 2015, 276 : 45 - 59
[26] TRANSITION TO DETONATION IN CORN STARCH DUST-OXYGEN AND DUST-AIR MIXTURES
ZHANG, F
GRONIG, H
[J]. COMBUSTION AND FLAME, 1991, 86 (1-2) : 21 - 32
[27] FLAME PROPAGATION THROUGH LAYERED FUEL-AIR MIXTURES
FENG, CC
LAM, SH
GLASSMAN, I
[J]. COMBUSTION SCIENCE AND TECHNOLOGY, 1975, 10 (1-2) : 59 - 71
[28] Effects of Inert Particulate Additives on Ignition and Flame Propagation in Dust–Air Mixtures
K. Hüttenbrenner
H. Kern
S. Tomasch
H. Raupenstrauch
[J]. Combustion, Explosion, and Shock Waves, 2020, 56 : 427 - 434
[29] The explosion overpressure field and flame propagation of methane/air and methane/coal dust/air mixtures
Bai, Chunhua
Gong, Guangdong
Liu, Qingming
Chen, Yahong
Niu, Guotao
[J]. SAFETY SCIENCE, 2011, 49 (10) : 1349 - 1354
[30] Numerical study on the characteristics of a nano-aluminum dust-air jet flame
Zou, Xiangrui
Wang, Ningfei
Wang, Junlong
Wang, Chao
Han, Lei
Shi, Baolu
[J]. AEROSPACE SCIENCE AND TECHNOLOGY, 2022, 121

← 1 2 3 4 5 →