High-resolution two-phase flow measurement techniques for the generation of experimental data for CFD code qualification
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U. Hampel
, E. Krepper , D. Lucas , M. Beyer , L. Szalinski , M. Banowski , F. Barthel , D. Hoppe , A. Bieberle and T. Barth
Abstract
Computational fluid dynamics simulations for two-phase flows are important in different fields of engineering and science. Since two-phase flows are inherently complex, also CFD modeling development requires special attention. The validation of model implementation and the derivation of physics based models for momentum, heat, and mass transfer in two-phase flow require experiments with generation of high-resolution measurement data. This, however, is a great challenge, since most standard flow measurement tools used in single phase flow situations, are not suited for multiphase flows. In this article we report on advanced imaging and measuring methods for two-phase flow experiments, which have been extensively used in the recent past to conduct experiments for two-phase flows at the Helmholtz-Zentrum Dresden-Rossendorf. In particular the application of wire-mesh sensors, ultrafast X-ray tomography, gamma ray tomography and positron emission tomography will be introduced and discussed.
Kurzfassung
Numerische Strömungssimulationen (CFD) für Zweiphasenströmungen sind für verschiedene Bereiche in Technik und Wissenschaft von großer Bedeutung. Da Zweiphasenströmungen inhärent komplex sind, gestaltet sich auch die CFD-Modellierung entsprechend schwierig. Insbesondere die Modellvalidierung, aber auch die Entwicklung von physikalischen Modellen für Impuls-, Wärme- und Stofftransport in Zweiphasenströmungen erfordert spezielle Experimente mit Strömungsmessdaten mit hoher zeitlicher und räumlicher Auflösung. Dies stellt jedoch eine große Herausforderung dar, da die meisten Messverfahren, welche für Einphasenströmungen heutzutage genutzt werden, für Mehrphasenströmungen nicht geeignet sind. In diesem Beitrag werden fortgeschrittene bildgebende Messverfahren für Zweiphasenströmungen vorgestellt, welche in der jüngeren Vergangenheit am Helmholtz-Zentrum Dresden-Rossendorf maßgeblich entwickelt und für experimentelle Studien qualfiziert und eingesetzt wurden. Insbesondere werden die Gittersensortechnik, die ultraschnelle Röntgentomographie, die Gammastrahlentomographie und die Positronenemissionstomographie beleuchtet.
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© 2013, Carl Hanser Verlag, München
Articles in the same Issue
- Contents/Inhalt
- Contents
- Summaries/Kurzfassungen
- Summaries
- Editorial
- Actual status of the research alliances “Condensation Induced Water Hammer” and “Boiling processes in Pressurized Water Reactors”
- Technical Contributions/Fachbeiträge
- High-resolution two-phase flow measurement techniques for the generation of experimental data for CFD code qualification
- Condensation induced water hammer (CIWH) – relevance in the nuclear industry and state of science and technology
- Experiments of condensation-induced water hammers at the UniBw Munich
- Development of a 1 D hybrid HTC model using CFD simulations for the analysis of direct contact condensation as the driving force for water hammers
- 1D Models for Condensation Induced Water Hammer in Pipelines
- Modelling, simulation and experiments on boiling processes in pressurized water reactors
- CFD analysis of a void distribution benchmark in a rod bundle
- CFD-modelling of subcooled boiling
- On the pair correlation function in a bubble swarm
- Large Eddy Simulation of the shear flow instability in a rod-bundle assembly
- Small scale boiling experiments using two-dimensional imaging with high-speed camera and optical coherence tomography
- Validation of mechanistic CHF models using optical measuring techniques
- Experimental investigations of single and two-phase flow in a heated rod bundle
- CFD-Modeling of turbulent flows in rod bundle and comparison to experiments
- About the change in boiling behaviour of water with coolant additives in PWR
- Simulation of external reactor vessel cooling in a lumped-parameter code
Articles in the same Issue
- Contents/Inhalt
- Contents
- Summaries/Kurzfassungen
- Summaries
- Editorial
- Actual status of the research alliances “Condensation Induced Water Hammer” and “Boiling processes in Pressurized Water Reactors”
- Technical Contributions/Fachbeiträge
- High-resolution two-phase flow measurement techniques for the generation of experimental data for CFD code qualification
- Condensation induced water hammer (CIWH) – relevance in the nuclear industry and state of science and technology
- Experiments of condensation-induced water hammers at the UniBw Munich
- Development of a 1 D hybrid HTC model using CFD simulations for the analysis of direct contact condensation as the driving force for water hammers
- 1D Models for Condensation Induced Water Hammer in Pipelines
- Modelling, simulation and experiments on boiling processes in pressurized water reactors
- CFD analysis of a void distribution benchmark in a rod bundle
- CFD-modelling of subcooled boiling
- On the pair correlation function in a bubble swarm
- Large Eddy Simulation of the shear flow instability in a rod-bundle assembly
- Small scale boiling experiments using two-dimensional imaging with high-speed camera and optical coherence tomography
- Validation of mechanistic CHF models using optical measuring techniques
- Experimental investigations of single and two-phase flow in a heated rod bundle
- CFD-Modeling of turbulent flows in rod bundle and comparison to experiments
- About the change in boiling behaviour of water with coolant additives in PWR
- Simulation of external reactor vessel cooling in a lumped-parameter code