Leakage-flow-induced vibrations of a chimney structure suspended in a liquid flow
Technical Report
·
OSTI ID:5624494
Results are presented of flow-induced vibration tests conducted to assess the vibration characteristics of a chimney structure suspended in a liquid flow. The test article is a full-scale model of a flow chimney used in a nuclear reactor as a part of reactor upper internals. All pertinent prototype conditions achievable were simulated in a laboratory environment. The test results show that the chimney experiences an unstable, motion-limited vibration which has a distinct lock-in phenomenon with respect to the flowrate. This unstable vibration is associated with the leakage-flow-modulated excitation through the small clearances between the chimney and its supports.
- Research Organization:
- Argonne National Lab., IL (USA)
- OSTI ID:
- 5624494
- Report Number(s):
- N-85-18420
- Country of Publication:
- United States
- Language:
- English
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