Abo Bibliothek: Guest
THMT-12. Proceedings of the Seventh International Symposium On Turbulence Heat and Mass Transfer
September, 24-27, 2012, Palermo, Italy

DOI: 10.1615/ICHMT.2012.ProcSevIntSympTurbHeatTransfPal


ISBN Print: 978-1-56700-302-4

ISSN: 2377-2816

Expansion of high-pressure superheated liquids: multiphase flows and shock effects

pages 2052-2055
DOI: 10.1615/ICHMT.2012.ProcSevIntSympTurbHeatTransfPal.2110
Get accessGet access

ABSTRAKT

Accidents with pressure-liquefied hydrocarbons triggered by total or partial loss of containment may result in rapid boil-up and expansion of the superheated liquid, the energy yield in this process can be high enough to generate blast waves in the atmosphere. In this paper, a one-dimensional model for the "physical" explosion is developed. The main zones existing in the expanding cloud of superheated liquid are considered, including single and two-phase ones. A model is developed under the assumption of local thermodynamic equilibrium between the phases in the two-phase zone, coupled with Euler equations in the atmosphere. Numerical simulations demonstrate that the energy release rate is limited by the relatively slow propagation of boil-up wave. Efficiencies of the "physical" explosions are shown to be much (by an order of magnitude) lower with those from high explosives (TNT), which has to be taken into account in risk analysis of high-pressure vessels with pressure-liquefied substances.

Digitales Portal Digitale Bibliothek eBooks Zeitschriften Referenzen und Berichte Forschungssammlungen Preise und Aborichtlinien Begell House Kontakt Language English 中文 Русский Português German French Spain