Flame acceleration and DDT run-up distance for smooth and obstacles filled tubes

被引：99

作者：

Silvestrini, M. ^{[2
]}

Genova, B. ^{[2
]}

Parisi, G. ^{[2
]}

Trujillo, F. J. Leon ^{[1
]}

机构：

[1] Univ Roma La Sapienza, I-00184 Rome, Italy

[2] Corpo Nazl Vigili Fuoco, Comando Prov VVF Roma, I-00184 Rome, Italy

来源：

JOURNAL OF LOSS PREVENTION IN THE PROCESS INDUSTRIES | 2008年 / 21卷 / 05期

关键词：

DDT; Flame acceleration; Flame front pressure; Flame speed; Tubes; Run-up distance;

D O I：

10.1016/j.jlp.2008.05.002

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

The process of flame acceleration inside the tubes and channels depends on several parameters such as nature of the fuel involved, composition of the mixture and configuration of the enclosure itself. The wall roughness and the presence of obstacles in the flame path act as a turbulence generator causing continuous flame acceleration. In some situations the flame can reach a sufficiently high speed to allow the transition of the deflagration into a detonation. A considerably large amount of experimental data on flame speed and DDT run-up distance for several mixtures have been accumulated. Nevertheless simple relationships, based on the most relevant parameters governing the phenomenon, could be useful for design purpose and safety assessment. The present paper suggests some simplified formulas for the evaluation of flame speed and DDT run-up distance of flammable mixtures for both smooth and obstacles filled tubes. (C) 2008 Elsevier Ltd. All rights reserved.

引用

页码：555 / 562

页数：8

共 30 条

[1]

*AICHE, 1994, GUID EV CHAR VAP CLO, P387

[2]

Bartknecht W, 1971, BRENNGAS STAUBEXPLOS

[3] Gas explosion handbook [J].

Bjerketvedt, D ;

Bakke, JR ;

vanWingerden, K .

JOURNAL OF HAZARDOUS MATERIALS, 1997, 52 (01) :1-150

[4] Flame propagation in industrial scale piping [J].

Chatrathi, K ;

Going, JE ;

Grandestaff, B .

PROCESS SAFETY PROGRESS, 2001, 20 (04) :286-294

[5]

CICCARELLI G, 1998, NUREGCR6509

[6] On the ''tulip flame'' phenomenon [J].

Clanet, C ;

Searby, G .

COMBUSTION AND FLAME, 1996, 105 (1-2) :225-238

[7]

Cybulski W, 1975, Coal dust explosions and their suppression

[8] Effect of scale on the onset of detonations [J].

Dorofeev, SB ;

Sidorov, VP ;

Kuznetsov, MS ;

Matsukov, ID ;

Alekseev, VI .

SHOCK WAVES, 2000, 10 (02) :137-149

[9] Evaluation of limits for effective flame acceleration in hydrogen mixtures [J].

Dorofeev, SB ;

Kuznetsov, MS ;

Alekseev, VI ;

Efimenko, AA ;

Breitung, W .

JOURNAL OF LOSS PREVENTION IN THE PROCESS INDUSTRIES, 2001, 14 (06) :583-589

[10]

EDER A, 1999, 22 INT S SHOCK WAV I

← 1 2 3 →