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- W2235367239 abstract "There were many studies on premixed flame propagation in tubes, includingopen tubes and enclosures. Yet, no sufficient data obtained for explosion properties inmedium scale piping system to assist engineers or practitioners in determining thepotential hazard posed due to explosion. In this work, an experimental study had beencarried out to investigate the explosion properties in a pipeline using two pipeconfigurations, i.e. straight and 90 degree bend. A horizontal steel pipe, with 2 m long(L) and 0.1 m diameter (D), giving L/D ratio of 20 was used in the range of equivalenceratios (Ф) from 0.5 to 1.8. The 90 degree bend pipe had a bend radius of 0.1 m withadded a further 1 m to the length of the pipe (based on the centerline length of thesegment). Natural gas/pure oxygen mixture was prepared using partial pressure methodand a homogeneous composition was achieved by circulating the mixture using a solidball which was placed in the mixing cell. It was shown that stoichiometric mixtures gavethe highest flame speed measurement, both on straight and bend pipes. Stoichiometricconcentration (Ф = 1.0) gave significant maximum overpressure of 5.5 bars for bendpipe, compared to 2.0 bars on straight pipe explosion test; approximately 3 times higher.This was due to bending part that acted like obstacles. This mechanism could induce andcreated more turbulence, initiated the combustion of unburned pocket at the cornerregion, causing high mass burning rate and hence, increased the flame speed. It was alsoshown that the flame speed was enhanced by factor of 3 for explosion in bend pipecompared to straight pipe. It can be concluded that the bend can create greaterturbulence effect compared to straight pipe configuration and applying appropriatesafety devices before the area of the bends is recommended as one of the effectivemethods to prevent the explosion from happen." @default.
- W2235367239 created "2016-06-24" @default.
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- W2235367239 date "2013-09-01" @default.
- W2235367239 modified "2023-09-27" @default.
- W2235367239 title "Premixed flame acceleration in straight and bend close pipe" @default.
- W2235367239 hasPublicationYear "2013" @default.
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