Cavitation damage observations within scroll expander lubrication systems
Authors: Tzanakis, I., Hadfield, M., Georgoulas, A. and Kotsovinos, N.
Journal: WIT Transactions on Engineering Sciences
Volume: 66
Pages: 261-272
ISBN: 9781845644406
ISSN: 1743-3533
DOI: 10.2495/TD100221
Abstract:Observations of cavitation damage within a lubricated expander system are studied experimentally. Typical experimental analysis is used to observe cavitation erosion features such as SEM, light-microscopy and lightinterferometer. An experimental test-rig is used to study bubble characteristics within fluids to compare the theoretical analysis and practical in-service results from the expander system. Using an ultra-sonic methodology and high-speed camera techniques the bubbles are observed within the working fluids. A 2D numerical simulation of the scroll was performed to explore the mechanism which generates scroll cavitation. It is found that the pressure is high enough to liquefy instantaneously part of the refrigerant close to the bottom boundary, creating conditions for the generation of cavitation bubbles within the liquefied refrigerant. This finding resolves the puzzle how the refrigerant which enters the scroll in gas phase produces cavitation. © 2010 WIT Press.
Source: Scopus
Cavitation damage observations within scroll expander lubrication systems
Authors: Tzanakis, I., Hadfield, M., Georgoulas, A. and Kotsovinos, N.
Journal: TRIBOLOGY AND DESIGN
Pages: 261-+
ISBN: 978-1-84564-440-6
DOI: 10.2495/TD100221
Source: Web of Science (Lite)
Cavitation damage observations within scroll expander lubrication systems
Authors: Tzanakis, I., Hadfield, M. and Kotsovinos, N.
Conference: Third International Conference on Tribology and Design
Dates: 11-13 May 2010
Abstract:Observations of cavitation damage within a lubricated compressor system is studied experimentally. Components from field studies are examined and in particular within high carbon materials operating within a refrigerant/oil environment. Typical experimental analysis is used to observe cavitation erosion features such as SEM, light-microscopy and light-interferometer. Bubble generation and properties are studied theoretically to characterise the wear mechanisms and provide a basis for predictive modelling.
An experimental test-rig is used to study bubble characteristics within fluids to compare the theoretical analysis and practical in-service results from the compressor system. Using an ultra-sonic methodology and high-speed camera techniques the bubbles are observed within the working fluids. Results from the experimental studies and theoretical analysis are presented with discussion concerning the bubble generation and cavitation erosion wear mechanisms.
http://www.wessex.ac.uk/10-conferences/tribology-and-design-2010.html
Source: Manual
Preferred by: Mark Hadfield