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A possible mechanism for the onset of pressure oscillation during venting

✍ Scribed by S.M. Frolov; B.E. Gelfand; S.A. Tsyganov

Publisher
Elsevier Science
Year
1990
Tongue
English
Weight
387 KB
Volume
3
Category
Article
ISSN
0950-4230

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✦ Synopsis

Pressure relief systems of various types are used intensively to prevent the spread of accidental internal explosions in vessels and reactors. However, recent studies have shown that venting may result in the generation of strong pressure oscillations. This paper deals with the mechanism of these oscillations based on the assumptions: first that self-ignition is possible in an unburnt mixture; and second that interaction occurs between spontaneous reaction fronts and rarefaction waves generated by the vent opening. It is shown that the oscillations may arise only in large-scale vessels, hence the use of small-scale set-ups for simulation of the phenomenon could be inaccurate. A satisfactory agreement between predicted and measured results is indicated.

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