Duct venting of gas explosions

Revision of two proposed engineering correlations

Risto Lautkaski

Research output: Contribution to journalArticleScientificpeer-review

6 Citations (Scopus)

Abstract

A part of the comparison of methods for vent dimensioning of gas explosions by Razus and Krause (2001) has been revised. The semi-empirical methods by Bradley and Mitcheson, 1978a, Bradley and Mitcheson, 1978b and Molkov, Dobashi, Suzuki, and Hirano (1999) were equally accurate for tests with covered vent. Empirical correlations for duct vented gas and dust explosions were combined with the Molkov method to predict explosion overpressures measured in tests of duct vented gas explosions. Since 29 of the 65 tests were made with town gas–air mixtures, the values of burning velocity and expansion factor of such mixtures have been estimated. The correlations by Bartknecht (1993) and Siwek (1998) had comparable accuracies. The methods for duct vented dust explosions by Tamanini and Fischer (2003) and Ural (2005) were less accurate. Two new engineering correlations by Di Benedetto et al., 2007, Di Benedetto et al., 2008 were found flawed. The parameters of the earlier correlation were fitted to test data. The later correlation was complemented with a term containing vent opening pressure. The revised correlations provided predictions comparable to those made with the methods by Bartknecht (1993) and Siwek (1998).

Original languageEnglish
Pages (from-to)400-413
JournalJournal of Loss Prevention in the Process Industries
Volume25
Issue number2
DOIs
Publication statusPublished - 2012
MoE publication typeA1 Journal article-refereed

Fingerprint

Explosions
explosions
Ducts
engineering
Gases
gases
Vents
Dust
dust
testing
methodology
towns
Explosion
Gas
Pressure
prediction

Keywords

  • Dust explosion
  • empirical methods
  • gas explosion
  • town gas
  • vent dimensioning
  • vent duct

Cite this

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title = "Duct venting of gas explosions: Revision of two proposed engineering correlations",
abstract = "A part of the comparison of methods for vent dimensioning of gas explosions by Razus and Krause (2001) has been revised. The semi-empirical methods by Bradley and Mitcheson, 1978a, Bradley and Mitcheson, 1978b and Molkov, Dobashi, Suzuki, and Hirano (1999) were equally accurate for tests with covered vent. Empirical correlations for duct vented gas and dust explosions were combined with the Molkov method to predict explosion overpressures measured in tests of duct vented gas explosions. Since 29 of the 65 tests were made with town gas–air mixtures, the values of burning velocity and expansion factor of such mixtures have been estimated. The correlations by Bartknecht (1993) and Siwek (1998) had comparable accuracies. The methods for duct vented dust explosions by Tamanini and Fischer (2003) and Ural (2005) were less accurate. Two new engineering correlations by Di Benedetto et al., 2007, Di Benedetto et al., 2008 were found flawed. The parameters of the earlier correlation were fitted to test data. The later correlation was complemented with a term containing vent opening pressure. The revised correlations provided predictions comparable to those made with the methods by Bartknecht (1993) and Siwek (1998).",
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Duct venting of gas explosions : Revision of two proposed engineering correlations. / Lautkaski, Risto.

In: Journal of Loss Prevention in the Process Industries, Vol. 25, No. 2, 2012, p. 400-413.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

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T2 - Revision of two proposed engineering correlations

AU - Lautkaski, Risto

PY - 2012

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AB - A part of the comparison of methods for vent dimensioning of gas explosions by Razus and Krause (2001) has been revised. The semi-empirical methods by Bradley and Mitcheson, 1978a, Bradley and Mitcheson, 1978b and Molkov, Dobashi, Suzuki, and Hirano (1999) were equally accurate for tests with covered vent. Empirical correlations for duct vented gas and dust explosions were combined with the Molkov method to predict explosion overpressures measured in tests of duct vented gas explosions. Since 29 of the 65 tests were made with town gas–air mixtures, the values of burning velocity and expansion factor of such mixtures have been estimated. The correlations by Bartknecht (1993) and Siwek (1998) had comparable accuracies. The methods for duct vented dust explosions by Tamanini and Fischer (2003) and Ural (2005) were less accurate. Two new engineering correlations by Di Benedetto et al., 2007, Di Benedetto et al., 2008 were found flawed. The parameters of the earlier correlation were fitted to test data. The later correlation was complemented with a term containing vent opening pressure. The revised correlations provided predictions comparable to those made with the methods by Bartknecht (1993) and Siwek (1998).

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