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A model of the near-field expansion of CO2 jet releasedfrom a ruptured pipeline

DOI: 10.1615/ICHMT.2015.THMT-15.1790
pages 795-798

Wentian Zheng
Department of Chemical Engineering, University College London, London WC1E7JE, United Kingdom

S. Brown
Department of Chemical Engineering, University College London, London WC1E 7JE, UK

Sergey Martynov
Department of Chemical Engineering, University College London, Torrington Place, London WC1E 7JE, UK

Haroun Mahgerefteh
Department of Chemical Engineering, University College London, Torrington Place, London WC1E 7JE, UK

Résumé

The transportation of pressurised CO2 using pipelines is a crucial element of the Carbon Capture and Storage chain; for their safe design the ability to accurately predict the consequences of a failure, the jet release and ensuing dispersion is essential. Such phenomena are commonly modelled in stages: jet expansion followed by atmospheric dispersion. For jet expansion modelling, both analytical and Computational Fluid Dynamic (CFD) models are available to predict the fully expanded flow conditions which are subsequently used as inputs in dispersion modelling. Although analytical models are computationally efficient, due to the lack of experimental data, their predictions have yet been verified. In this work, a conservation law based multiphase analytical model is constructed with a rigorous equation of state. The predicted flow variables at full expansion are then compared to those from the Shear Stress Transport k-ω CFD model. The quantitative comparisons between two models provide necessary verification of the application of analytical models in accidental release modelling.

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