Release and combustion of pressure-liquefied gases: experiments and modelling

Información del proyecto

Identificador del acuerdo de subvención: INTAS-2000-00706

Proyecto cerrado

Fecha de inicio 1 Octubre 2001

Fecha de finalización 30 Septiembre 2004

Financiado con arreglo a

• International Association for the promotion of cooperation with scientists from the independent states of the former Soviet Union (INTAS), 1993-

Coste total

Sin datos

Aportación de la UE

€ 150 000,00

Coordinado por

Université de Poitiers
France

Objetivo

The principal objective of the project is the evaluation of environmental impact of accidents involving depressurisation or total loss of containment with a pressure-liquefied fuel gas, two-phase fuel release into the atmosphere, vapour-droplet cloud formation and combustion. Such accidents are very hazardous because large amounts of hydrocarbon fuels burn uncontrollably generating powerful heat fluxes, the fragments of ruptured vessel being thrown at high velocities as projectiles, often leading to property losses and causing fatal injuries. Since large-scale experiments are very dangerous and expensive, the following research method is chosen: to perform small-scale experiments and develop mathematical models for all stages of the process (vessel break-up, liquefied fuel flash evaporation and expansion of the two-phase cloud, fragments scattering, fuel cloud ignition and fireball evolution). The developed models based on the latest advances in mechanics, physical chemistry and combustion theory, will make the up scaling of experimental results possible. The models will be validated against the large-scale experiments available in the literature and case histories of major accidents. The numerical codes based on the developed models will be used to predict the results of probable accidents and to evaluate their impact on the environment.

The following objectives will be achieved:
To study experimentally and theoretically the liquefied gas boiling-up, flash evaporation and aerosol formation upon rapid depressurisation following total loss of containment;
To study theoretically and experimentally the over pressurisation and break-up of containment filled in with a metastable liquid-gas mixture; To develop a break-up criterion applicable to different types of vessels;
To model numerically the break-up of a containment, number and mass distribution of fragments, acceleration and final velocities of fragments;
To develop a physical theory of an outflow of a super-heated liquid-vapour mixture in the case of sudden loss of the containment, its mixing with the atmospheric air, droplet break-up, two-phase cloud formation and propagation in the atmosphere;
To model the flame propagation in a fuel vapour-droplet cloud and fireballs occurring after ignition of a two-phase cloud. To calculate the structure of fireball, to determine the fireball maximum size, lift-off and burning time;
To calculate the radiation emission heat fluxes from a burning vapour-droplet cloud and determines the distances corresponding to different hazard levels;
To apply the developed method to analysis of results obtained in the experiments of different scales available in the literature, give recommendations for using the method developed (range of parameters, scaling, assessment of possible effects). To generalise the results in order to enable their use in engineering practice, quantitative risk assessment and for case history studies;
To develop a method for quantitative evaluation of hazardous effects of BLEVEs.
The expected results will provide insight into fundamentals of two-phase combustion, materials behaviour under intense dynamical loading, non-equilibrium phase transitions. The results will have direct practical applications answering to the critical issues:
To determine the minimal safe distance between each storage and autoroutes, railways, public buildings;
To develop the methods for quantitative evaluation of characteristics and environmental impact of accidents expressed in clear equivalent units suitable for their practical use.

Thus, the results will contribute to risk assessment, loss prevention and safety promotion at the storage site, in transportation and processing of pressure-liquefied hydrocarbon fuels.

Ámbito científico (EuroSciVoc)

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Programa(s)

• IC-INTAS - International Association for the promotion of cooperation with scientists from the independent states of the former Soviet Union (INTAS), 1993-

Tema(s)

• 6 - Engineering Sciences, Aeronautics, Space
• OPEN - OPEN Call

Convocatoria de propuestas

Datos no disponibles

Régimen de financiación

Datos no disponibles

Coordinador

Université de Poitiers

• Aportación de la UE: Sin datos
• Dirección: BP 109 - Site du Futuroscope ; 86960 Futuroscope Cedex ; Francia
• Coste total: Sin datos

Participantes (7)

Academy of Sciences of Moldova

Moldavia

• Aportación de la UE: Sin datos
• Dirección: Academy str.5 ; 2028 Kishinev
• Coste total: Sin datos

Electrogorsk Research and Engineering Centre for Nuclear Power Plant Safety

Rusia

• Aportación de la UE: Sin datos
• Dirección: Bezymyannaya Street 6 ; 142530 Electrogorsk
• Coste total: Sin datos

Free University of Brussels

Bélgica

• Aportación de la UE: Sin datos
• Dirección: 50 avenue F.D. Roosevelt ; 1050 Brussels
• Coste total: Sin datos

M.V. Lomonosov Moscow State University

Rusia

• Aportación de la UE: Sin datos
• Dirección: Vorobiovy Gory, Main Bldg., A ; 119899 Moscow
• Coste total: Sin datos

Russian Academy of Sciences

Rusia

• Aportación de la UE: Sin datos
• Dirección: 101, Vernadskogo prosp. ; 117526 Moscow
• Coste total: Sin datos

University of Central Lancashire

Reino Unido

• Aportación de la UE: Sin datos
• Dirección: Corporation Street ; PR1 2HE Preston
• Coste total: Sin datos

Ural Branch of the Russian Academy of Sciences

Rusia

• Aportación de la UE: Sin datos
• Dirección: 91, Pervomayskaya str. ; 620219 Ekaterinburg
• Coste total: Sin datos