Adiabatic two-phase flow in a test section with partial flow blockages

TL;DRAbstract

An experiment has been performed to study vertical two-phase flow behavior in the vicinity of partial flow blockages, where complex phenomena such as phase separation, droplet entrainment and flow stratification are occurring. Freon-114 was used to simulate a high pressure steam/water mixture to permit low pressure testing with full visual access. Detailed void fraction scans were taken with a gamma densitometer. Flowing quality was obtained from inlet temperatures and the known heat input. Data were taken over a mass flux range of 75 to 600 Kg/M{sup 2}-sec (55,000 to 440,000 lbm/Hr-ft{sup 2}), and an inlet void fraction range of 4% to 60%, at a pressure of 0.275 MPa (40 psia). The objective of this work is to provide data for two-phase flow model assessment and code qualification. Comparisons of the test data with the TRACE and FLOW-3D codes were made, using constitutive models from the open literature. The flow blockages divert the mixed phases laterally, and a liquid recirculation z

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