Computational models to dertermine fluiddynamical transients due to condensation induced water hammer (CIWH)
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Abstract
Condensation induced water hammer (“condensation hammer”, CIWH) represent a dangerous phenomenon in pipings, which can endanger the pipe integrity. If they cannot be excluded, they have to be taken into account for the integrity proof of components and pipe structures. Up to now, there exists no substantiated model, which sufficiently determines loads due to CIWH. Within the framework of the research alliance CIWA, a tool for estimating the potential and the amount of pressure loads will be developed based on theoretical work and supported by experimental results. This first study discusses used computational models, results of experimental observations and gives an outlook onto future techniques.
Kurzfassung
Kondensationsinduzierte Wasserschläge („Kondensationsschläge“, CIWH) stellen ein gefährliches Phänomen für Rohrleitungssysteme dar welche deren Integrität gefährden kann. Wenn solche Ereignisse nicht ausgeschlossen werden können, müssen sie bei der sicherheitstechnischen Bewertung von Komponenten und Rohrleitungsstrukturen berücksichtigt werden. Bis heute existiert kein Berechnungsmodell das auf abgesicherter Basis abdeckende Belastungen aus CIWH ermittelt. Im Rahmen des Forschungsverbundprojekts CIWA wird ein Werkzeug zur Abschätzung des Potenzials von CIWH und den daraus entstehenden Belastungen auf Basis theoretischer und experimenteller Arbeiten entwickelt. Dieser erste Beitrag behandelt eingesetzte numerische Berechnungsansätze, vergleicht Ergebnisse experimenteller Arbeiten und gibt einen Ausblick auf zukünftige Ansätze.
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© 2012, Carl Hanser Verlag, München
Articles in the same Issue
- Contents/Inhalt
- Contents
- Summaries/Kurzfassungen
- Summaries
- Editorial
- Pressure Surges in Nuclear Power Plants – selected contributions for the homonymous mini-symposium of the NURETH-14 in Toronto
- Technical Contributions/Fachbeiträge
- Maintaining competence in nuclear safety and waste management research by BMBF
- Computational models to dertermine fluiddynamical transients due to condensation induced water hammer (CIWH)
- Condensation-induced water hammer in a horizontal pipe
- Slug modeling with 1D two-fluid model
- Delayed equilibrium model and validation experiments for two-phase choked flows relevant to LOCA
- Tripartite mass transfer model: development, implementation in DYVRO, verification and validation
- Condensation induced water hammer – overview and own experiments
- A discussion of hyperbolicity in CATHENA 4: Virtual Mass and phase-to-interface pressure differences
- Pressure surge in Wendelstein 7-X experimental stellarator facility
- Condensation induced water hammer and steam assisted gravity drainage in the Athabasca oil sands
Articles in the same Issue
- Contents/Inhalt
- Contents
- Summaries/Kurzfassungen
- Summaries
- Editorial
- Pressure Surges in Nuclear Power Plants – selected contributions for the homonymous mini-symposium of the NURETH-14 in Toronto
- Technical Contributions/Fachbeiträge
- Maintaining competence in nuclear safety and waste management research by BMBF
- Computational models to dertermine fluiddynamical transients due to condensation induced water hammer (CIWH)
- Condensation-induced water hammer in a horizontal pipe
- Slug modeling with 1D two-fluid model
- Delayed equilibrium model and validation experiments for two-phase choked flows relevant to LOCA
- Tripartite mass transfer model: development, implementation in DYVRO, verification and validation
- Condensation induced water hammer – overview and own experiments
- A discussion of hyperbolicity in CATHENA 4: Virtual Mass and phase-to-interface pressure differences
- Pressure surge in Wendelstein 7-X experimental stellarator facility
- Condensation induced water hammer and steam assisted gravity drainage in the Athabasca oil sands