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| Full Citation |
| Material Information |
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Title: |
2.1.4 - The detection of cavitation in liquid metal flows Cavitation |
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Series Title: |
7th International Conference on Multiphase Flow - ICMF 2010 Proceedings |
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Physical Description: |
Conference Papers |
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Creator: |
Milenković, R.
Dementjevs, S. |
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Publisher: |
International Conference on Multiphase Flow (ICMF) |
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Publication Date: |
June 4, 2010 |
| Subjects |
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Subject: |
cavitation detection
liquid metal flows
structural acceleration
sound pressure |
| Notes |
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Abstract: |
The detection of cavitation is of primary importance for safeguarding facilities using liquid metals as operating fluids, in particular for high-power liquid heavy metal targets for spallation neutron production. Since for liquid metal flows, neither during laboratory thermal-hydraulic experiments, nor during real operational conditions any kind of visualization tests are possible, special detection methods have to be applied and evaluated. An extensive experimental investigation has been carried out under the project called EURISOL (The European Isotope Separation On-Line). The project was launched in 2005 by the European Union with the aim of developing a novel isotope
production facility within the context of the 6th framework program for research and development. Two structural-hydraulic tests of the EURISOL neutron converter target mock-up, named METEX 1 and METEX 2 (MErcury Target EXperiment 1 and 2), have been conducted by PSI (Paul Scherrer Institut, Switzerland) in cooperation with IPUL (Institute of Physics of theUniversity of Latvia, Latvia) and CERN (Conseil Européen pour la Recherche Nucléaire-European Organization for Nuclear Research) (Samec 2009 and Milenković 2009). The methodology for cavitation detection was based on advanced analysis (Mallat 1999) of the structural vibrations of the target mock-up, sound measurements, pressure measurements, strain measurements and acoustic emission measurements. Namely, various advanced time-frequency analysis methods, including the Short Time Fourier Transform (STFT), in particular, the Gabor Transform (GT) and the Discrete Wavelet Analysis (DWA) were applied on data samples with specified number of points. Even under noisy conditions, the detection of incipient and developed cavitation was possible during carefully conducted transient tests. Special attention is given here to the analysis of the sound pressure and structural acceleration data acquired by a microphone and acceleration sensors, respectively. |
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General Note: |
The International Conference on Multiphase Flow (ICMF) first was held in Tsukuba, Japan in 1991 and the second ICMF took place in Kyoto, Japan in 1995. During this conference, it was decided to establish an International Governing Board which oversees the major aspects of the conference and makes decisions about future conference locations. Due to the great importance of the field, it was furthermore decided to hold the conference every three years successively in Asia including Australia, Europe including Africa, Russia and the Near East and America. Hence, ICMF 1998 was held in Lyon, France, ICMF 2001 in New Orleans, USA, ICMF 2004 in Yokohama, Japan, and ICMF 2007 in Leipzig, Germany. ICMF-2010 is devoted to all aspects of Multiphase Flow. Researchers from all over the world gathered in order to introduce their recent advances in the field and thereby promote the exchange of new ideas, results and techniques. The conference is a key event in Multiphase Flow and supports the advancement of science in this very important field. The major research topics relevant for the conference are as follows: Bio-Fluid Dynamics; Boiling; Bubbly Flows; Cavitation; Colloidal and Suspension Dynamics; Collision, Agglomeration and Breakup; Computational Techniques for Multiphase Flows; Droplet Flows; Environmental and Geophysical Flows; Experimental Methods for Multiphase Flows; Fluidized and Circulating Fluidized Beds; Fluid Structure Interactions; Granular Media; Industrial Applications; Instabilities; Interfacial Flows; Micro and Nano-Scale Multiphase Flows; Microgravity in Two-Phase Flow; Multiphase Flows with Heat and Mass Transfer; Non-Newtonian Multiphase Flows; Particle-Laden Flows; Particle, Bubble and Drop Dynamics; Reactive Multiphase Flows |
| Record Information |
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Bibliographic ID: |
UF00102023 |
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Volume ID: |
VID00041 |
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Source Institution: |
University of Florida |
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Holding Location: |
University of Florida |
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Rights Management: |
All rights reserved by the source institution and holding location. |
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Resource Identifier: |
214-Milenkovic-ICMF2010.pdf |
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