Experimental investigations on the deflagration explosion characteristics of different DMELPG mixtures

Tae Sung Lee; Jae Yong Sung; Dal Jae Park

doi:10.1016/j.firesaf.2011.12.003

Experimental investigations on the deflagration explosion characteristics of different DMELPG mixtures

Tae Sung Lee, Jae Yong Sung, Dal Jae Park

Seoul National University of Science and Technology (SNUST)

Research output: Contribution to journal › Article › peer-review

33 Scopus citations

Abstract

The deflagration explosion characteristics of premixed dimethyl ether (DME)liquefied petroleum gas (LPG)air mixtures with different equivalence ratios and DME to DMELPG mixture ratios were investigated using a confined chamber with a length and cross section of 500 mm and 100×100 mm², respectively. Six fuels including 100% LPG, 100% DME and four different DMELPG mixtures with varying DME ratios (the DME was increased incrementally by 20%) were used in the experiments, and the effects of the equivalence ratio and DME ratio on the flame speed and overpressure were determined. As the equivalence ratio and DME to DMELPG mixture ratio were increased, an increase in the flame speed and overpressure was observed. The flow velocity vectors of unburnt mixtures ahead of the propagating flame in the wake of an obstacle were sensitive to the DME ratio. Moreover, the flame speed, flow velocity vector and overpressure of 100% LPG and 20% DME were similar. Thus, 20% DME and 100% LPG present similar explosion hazards.

Original language	English
Pages (from-to)	62-66
Number of pages	5
Journal	Fire Safety Journal
Volume	49
DOIs	https://doi.org/10.1016/j.firesaf.2011.12.003
State	Published - Apr 2012

Keywords

DMELPG mixtures
Flame speed
Flow velocity vectors
Overpressure

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10.1016/j.firesaf.2011.12.003

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@article{b64464baca37453baaaf7fa76779b67f,

title = "Experimental investigations on the deflagration explosion characteristics of different DMELPG mixtures",

abstract = "The deflagration explosion characteristics of premixed dimethyl ether (DME)liquefied petroleum gas (LPG)air mixtures with different equivalence ratios and DME to DMELPG mixture ratios were investigated using a confined chamber with a length and cross section of 500 mm and 100×100 mm2, respectively. Six fuels including 100\% LPG, 100\% DME and four different DMELPG mixtures with varying DME ratios (the DME was increased incrementally by 20\%) were used in the experiments, and the effects of the equivalence ratio and DME ratio on the flame speed and overpressure were determined. As the equivalence ratio and DME to DMELPG mixture ratio were increased, an increase in the flame speed and overpressure was observed. The flow velocity vectors of unburnt mixtures ahead of the propagating flame in the wake of an obstacle were sensitive to the DME ratio. Moreover, the flame speed, flow velocity vector and overpressure of 100\% LPG and 20\% DME were similar. Thus, 20\% DME and 100\% LPG present similar explosion hazards.",

keywords = "DMELPG mixtures, Flame speed, Flow velocity vectors, Overpressure",

author = "Lee, \{Tae Sung\} and Sung, \{Jae Yong\} and Park, \{Dal Jae\}",

year = "2012",

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doi = "10.1016/j.firesaf.2011.12.003",

language = "English",

volume = "49",

pages = "62--66",

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T1 - Experimental investigations on the deflagration explosion characteristics of different DMELPG mixtures

AU - Lee, Tae Sung

AU - Sung, Jae Yong

AU - Park, Dal Jae

PY - 2012/4

Y1 - 2012/4

N2 - The deflagration explosion characteristics of premixed dimethyl ether (DME)liquefied petroleum gas (LPG)air mixtures with different equivalence ratios and DME to DMELPG mixture ratios were investigated using a confined chamber with a length and cross section of 500 mm and 100×100 mm2, respectively. Six fuels including 100% LPG, 100% DME and four different DMELPG mixtures with varying DME ratios (the DME was increased incrementally by 20%) were used in the experiments, and the effects of the equivalence ratio and DME ratio on the flame speed and overpressure were determined. As the equivalence ratio and DME to DMELPG mixture ratio were increased, an increase in the flame speed and overpressure was observed. The flow velocity vectors of unburnt mixtures ahead of the propagating flame in the wake of an obstacle were sensitive to the DME ratio. Moreover, the flame speed, flow velocity vector and overpressure of 100% LPG and 20% DME were similar. Thus, 20% DME and 100% LPG present similar explosion hazards.

AB - The deflagration explosion characteristics of premixed dimethyl ether (DME)liquefied petroleum gas (LPG)air mixtures with different equivalence ratios and DME to DMELPG mixture ratios were investigated using a confined chamber with a length and cross section of 500 mm and 100×100 mm2, respectively. Six fuels including 100% LPG, 100% DME and four different DMELPG mixtures with varying DME ratios (the DME was increased incrementally by 20%) were used in the experiments, and the effects of the equivalence ratio and DME ratio on the flame speed and overpressure were determined. As the equivalence ratio and DME to DMELPG mixture ratio were increased, an increase in the flame speed and overpressure was observed. The flow velocity vectors of unburnt mixtures ahead of the propagating flame in the wake of an obstacle were sensitive to the DME ratio. Moreover, the flame speed, flow velocity vector and overpressure of 100% LPG and 20% DME were similar. Thus, 20% DME and 100% LPG present similar explosion hazards.

KW - DMELPG mixtures

KW - Flame speed

KW - Flow velocity vectors

KW - Overpressure

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U2 - 10.1016/j.firesaf.2011.12.003

DO - 10.1016/j.firesaf.2011.12.003

M3 - Article

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SN - 0379-7112

VL - 49

SP - 62

EP - 66

JO - Fire Safety Journal

JF - Fire Safety Journal

ER -

Experimental investigations on the deflagration explosion characteristics of different DMELPG mixtures

Abstract

Keywords

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