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Blast Load Inside Enclosure due to Flame Acceleration

[+] Author Affiliations
Jihui Geng, J. Kelly Thomas

Baker Engineering and Risk Consultants, Inc., San Antonio, TX

Paper No. PVP2015-45329, pp. V004T04A048; 7 pages
  • ASME 2015 Pressure Vessels and Piping Conference
  • Volume 4: Fluid-Structure Interaction
  • Boston, Massachusetts, USA, July 19–23, 2015
  • Conference Sponsors: Pressure Vessels and Piping Division
  • ISBN: 978-0-7918-5697-0
  • Copyright © 2015 by ASME


Enclosed chemical processes, laboratory facilities, boilers and reformer furnaces are typical examples of facilities and equipment where an internal VCE may be postulated to occur. The applied blast load history on the enclosure surfaces is required in order to assess the response of the enclosure to the postulated VCE. The internal blast pressure history and associated applied blast loads depend on a number of factors, such as: (1) the maximum flame speed attained in a flammable cloud, (2) the ratio of the cloud volume to the total enclosure volume, (3) the cloud location within the enclosure, and (4) the environment temperature. The purpose of work described in this paper was to investigate the dependence of internal blast pressure history and applied blast loads on the aforementioned factors. It was found that the applied loads on the enclosure surfaces can be roughly classified into two regimes: quasi-static and dynamic, depending on the combination of these factors. It can be important to identify the appropriate blast loading regime in order to properly analyze the structural response of the enclosure.

Copyright © 2015 by ASME
Topics: Blast effect , Flames



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