シリンダライナ及びシリンダブロックのキャビテーション***ージョンに関する研究

概要

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Cavitation may sometimes occur, on water jacket of cylinder liners or cylinder blocks in water cooled engines to cause serious troubles due to cavitation holes penetrating through them.<BR>This cause is not water flow as in the case of cavitation generated on a propeller etc., but is air bubbles generating mechanism of which is that: a slapping phenomenon arises in a piston, a striking force on that occasion brings about vibration of a liner, the vibration produces cooling water pressure fluctuation in a water jacket, magnitude of the pressure fluctuation becomes larger than static pressure of cooling water. Thus the air bubbles are generated by the liner vibration, and micro jet stream and shock wave generated when the air bubbles collapse erode the cylinder liner and the cylinder block.