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Volume 3, Issue 1 (December 2014)
Vibratory Cavitation Erosion With Vibrating and Stationary Specimens
(Received 17 May 2014; accepted 6 October 2014)
Published Online: 25 October 2014
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In the framework of the International Cavitation Erosion Test (ICET), 119 vibratory cavitation erosion tests were performed. Seventy of these tests were with vibrating specimens (VRV), and forty-nine with stationary specimens (VRS). From these tests, twenty tests of each type were chosen for this study. VRV tests are covered by ASTM G32-10, whereas for VRS, no standard has yet been published. This anomaly stems from the difficulties encountered in both testing and evaluating of VRS tests. All forty cavitation erosion–time curves were analyzed by the Transient Response for Erosion (TRE) method. For each curve, all three parameters were determined, namely: time lag (TL), time constant (τ), and the asymptotic value of the mean depth of erosion, mean depth of erosion (MDE) MDEMAX. These parameters were further applied to calculate the scatter of test results as obtained from various specimens tested under identical conditions. This method enables the determination of the absolute and relative scatter values at any time value along the test. Finally, several guidelines are specified for preparation of a future VRS standard.
Meged, Y. Formerly Senior Research Engineer,
Tribology Group of the Department of Mechanical Engineering, Univ. of Twente, Enschede, Haifa,
Stock #: MPC20140047
Title Vibratory Cavitation Erosion With Vibrating and Stationary Specimens