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Cavitation Erosion Rig

The cavitation erosion rig is a custom built rig using an ultrasonic horn to induce cavitation bubble creation, the bubbles then collapse on the surface, producing a supersonic micro-jet that erodes the surface underneath the horn.

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The cavitation erosion rig is a custom built rig using an ultrasonic horn to induce cavitation bubble creation, the bubbles then collapse on the surface, producing a supersonic micro-jet that erodes the surface underneath the horn.  This is referred to ‘indirect’ mode of cavitation.  The rig complies with ASTM G32, operating at 20 MHz at a displacement of 50 µm.  Tests can be conducted in distilled water for pure erosion and salt water for erosion-corrosion experiments.

Cavitation erosion rig
Cavitation erosion rig

The rig has been used for study of propeller materials for naval and commercial shipping applications, as well as erosion-resistance of candidate solutions for leading edge turbine blade protection.

Various papers have been produced from the use of this rig and links to DOIs:

The rig complies with ASTM G32, operating at 20 MHz at a displacement of 50 µm.  The amplitude is set up using a Keyence High-speed, High-accuracy CCD Laser Displacement Sensor.

The ASTM G32 can be found at this link.

 

Cavitation samples are 25 × 25 mm, below is a technical drawing that can be used to make the samples.

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