Abstract
It is well known that severe cavitation can cause erosion on the surfaces of fluid machineries. The long time growth of cavitation erosion makes significant mass loss and resultant geometry change of the fluid machineries. This geometry change might cause the change of the flow characteristics of the fluid machineries. The prediction of the change of the flow characteristics due to cavitation erosion are important issue for maintenance of the fluid system. In this paper cavitation erosion on the soft metal specimen is generated in a Venturi tube type apparatus. The erosion geometry is measured by an optical measurement device. The flow inside the apparatus is computed by using Computational Fluid Dynamics considering the measured cavitation erosion geometry. The flow characteristics with and without cavitation erosion are compared
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