Community Research and Development Information Service - CORDIS

FP5

Experimental and CFD technology for PREventive reduction of diesel engine emissions caused by cavitation EROsion - Prevero

Project ID: ENK6-CT-2002-00605
Funded under: FP5-EESD

Abstract

During the course of the PREVERO project the main objective was to learn about the erosion caused by cavitation and to develop a CFD tool applicable in the industrial environment for prediction of cavitation erosion damage. In order to numerically predict the damage due to bubble collapse it is very important to evaluate and quantify the number of collapsing bubbles. For this reason an advanced cavitation model was implemented into the CFD program AVL FIRE. Cavitation erosion in several test bodies has been investigated. The damaged specimens were studied and the materials' parameters were entered into the erosion model, which was implemented in FIRE along with the advanced cavitation model. The numerical results were compared against the experiments in terms of cavitating flow quantities as well as erosion effects.
Cavitation bubbles collapsing on the material's surface cause long-term damage if the collapses occur repeatedly at the same location. The main goal of AVL was to apply the experimental findings provided by other partners to validate the improved CFD tool AVL FIRE used for prediction of cavitation and consequent erosion damage. In order to predict the damage due to cavitation bubble collapse it is very important to quantify the number of collapsing bubbles. For this reason an advanced cavitation model was implemented into FIRE. The tool is able to quantitatively predict the amount of removed material as well as the incubation time, which is the time needed before any erosion damage will be observed. The CFD tool should also be applicable for systems other than injection components, every process undergoing cavitation can be considered. It was found that RANS is the numerical approach providing the results within time acceptable for industrial application.

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Record Number: 8452 / Last updated on: 2007-03-22
Category: PROJ