Cavitation thresholds of 5W30 and 10W30 oils were measured in laboratory experiments using electrically-driven disks of piezoelectric ceramic as sources of mechanical excitation. The technique allows the mechanical-wave power density at which cavitation begins to be observed and calculated from electrical quantities and the volume of the oil sample being tested. Both cavitation turn-on and turn-off thresholds have been measured as functions of temperature and frequency. The temperatures ranged from 20 to 100°C and the frequencies ranged from 50 kHz to 4 MHz. The experiments have shown these oils can be made to undergo cavitation at surprisingly low thresholds.
Cavitation Thresholds of Engine Oils as Functions of Temperature and Frequency
Sae Technical Papers
International Fuels & Lubricants Meeting & Exposition ; 1994
1994-10-01
Aufsatz (Konferenz)
Englisch
Cavitation thresholds of engine oils as functions of temperature and frequency
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