Abstract
The occurrence of cavitation is one of the main limiting factors in the operation and design of centrifugal pumps. In this paper a model for the prediction of sheet cavitation is described. This model has been implemented in a three-dimensional finite-element package, employing the potential-flow approximation of the governing flow equations. At the interface between vapor and liquid, pressure equilibrium is required. The closure region of the cavity is modeled as the collapse of a bubble, whose motion is described by the Rayleigh-Plesset equation. The effect of displacement of the flow due to presence of the sheet cavity is incorporated by the transpiration technique. This is a linearised approach which is well-known from techniques for coupling inviscid-flow methods to boundary-layer methods. The model gives the location of the sheet cavity (if present); its length is thus also predicted. The model has been validated by comparing sheet cavitation at the blades of a centrifugal pump impeller, obtained from CFD-computations and from visual observations in a model test.
Original language | English |
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Title of host publication | ASME Fluids Engineering Division Summer Meeting, FEDSM2005 |
Subtitle of host publication | Conference Proceedings |
Publisher | American Society of Mechanical Engineers |
Pages | 1233-1238 |
Number of pages | 6 |
Volume | 1 PART B |
ISBN (Electronic) | 9780791837603 |
ISBN (Print) | 9780791841983 |
DOIs | |
Publication status | Published - 2005 |
Event | 2005 ASME Fluids Engineering Division Summer Meeting, FEDSM 2005 - Houston, United States Duration: 19 Jun 2005 → 23 Jun 2005 |
Conference
Conference | 2005 ASME Fluids Engineering Division Summer Meeting, FEDSM 2005 |
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Abbreviated title | FEDSM |
Country/Territory | United States |
City | Houston |
Period | 19/06/05 → 23/06/05 |
Keywords
- Cavitation
- Centrifugal Pumps
- CFD Analysis
- NPSH
- Potential Flow
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