Servicio de Información Comunitario sobre Investigación y Desarrollo - CORDIS

Quantitative cavitation erosion analysis

In the framework of the PREVERO project, LEGI was in charge of providing experimental and theoretical support for the physical analysis and modelling of cavitation erosion.

A new experimental facility has been built to support the development of the erosion model. The objective was to provide basic experimental data for the validation of the modelling from both hydrodynamic and material viewpoints.

The erosion model allows the prediction of the incubation time and the erosion rate (MDPR).

AVL implemented the erosion model into the FIRE program.

Erosion model validation was performed by AVL with the LEGI geometry.

Numerical results showed that cavitation is expected to occur on the place where cavitation region ends. This was in agreement with the findings reported by LEGI, TU Graz and BOSCH. The maximum velocity around the cavitation reported by LEGI was 65 m/s, calculated velocity around the vapor region was 65 - 75m/s. The size of the cavitation region was fluctuating, which was observed in experiments as well. The size of the cavitation region corresponds to the erosion location, as reported previously. The erosion is predicted in the bubble collapse region in agreement with the measurement as well. The steady-state material removel rates reported by LEGI were 3-5e-10m/s, AVL FIRE predicted 3.33e-10m/s material removal.

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BP 53
38041 GRENOBLE cedex
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