Abstract
Cavitation erosion was compared between venturi tube and cavitating jet methods. It was found that the erosion by cavitating jets occurs 400 to 1000 times as fast as that by the venturi tube, thus the cavitating jet method is effective for the acceleration test. The exponent of the relation between MDERmax (mean depth of erosion rate) and flow velocity is 2.3 to 3.3 for venturi tube and is 6.5 for cavitating jet, which agrees with that of the relation between ΣFi^2 and flow velocity. It was concluded that MDERmax of venturi tube can be estimated from the extrapolation of the relation between ΣFi^2 and MDERmax which was obtained for the cavitating jet test.
