Fracture propagation control in CO2 pipelines: Validation of a coupled fluid-structure model
Aursand, Eskil; Dumoulin, Stephane; Hammer, Morten; Lange, Hans Iver; Morin, Alexandre; Munkejord, Svend Tollak; Nordhagen, Håkon Ottar
Journal article, Peer reviewed
Accepted version
Permanent lenke
http://hdl.handle.net/11250/2499723Utgivelsesdato
2016Metadata
Vis full innførselSamlinger
- Publikasjoner fra CRIStin - SINTEF Energi [1596]
- SINTEF Energi [1710]
- SINTEF Industri [1484]
Sammendrag
Existing engineering methods to ensure fracture propagation control in natural-gas transmission pipelines have been shown to be non-applicable when dense-phase CO2 is transported. To overcome this, a coupled fluid-structure interaction model has been developed. It consists of a homegeneous equlibrium flow model, coupled with the Span–Wagner equation of state and including solid-phase formation, and a finite-element model of the pipe taking into account large deformations and fracture propagation through a local fracture criterion. Model predictions are compared with data from two medium-scale crack-arrest experiments with dense-phase CO2. Good agreement is observed in fracture length, fracture propagation velocity and pressure. Simulations show that, compared to natural-gas pipelines, the pressure level at the opening fracture flaps is sustained at a much higher level and at a much longer distance behind the moving fracture tip. This may be one important reason why the existing engineering methods do not work for dense-phase CO2.