Regional distribution of molten Aluminum cavitation andcoefficient of sound pressure attenuation
ZHANG Wu,LI Xiao-qian,JIANG Ri-peng
School of Mechanical and Electrical Engineering, State Key Laboratory of High Performance Complex Manufacturing,Central South University, Changsha 410083, China
Abstract:The global ultrasound amplitude and frequency of an ultrasonic transducer’s end face was determined using a laser rangefinder, and data obtained was analyzed by utilizing FFT detailed analysis method to determine the global amplitude distribution of the end face. A titanium plate was placed under the ultrasonic transducer in the molten aluminum. The ultrasonic transducer was activated for 20h to find the distribution of cavitation corrosion area motivated by the ultrasonic transducer in molten aluminum by analyzing the cavitation area of the titanium plate. The cavitation area was an ellipsoid with distinct boundaries, and the longest distance between the boundaries and the ultrasonic transducer was 68mm. Therefore, the coefficient of sound pressure attenuation of 20kHz ultrasound could be calculated by the given cavitation threshold and detected data in this work.
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