Cavitation surface processing nozzle and cavitation surface processing apparatus

A cavitation surface processing nozzle comprising:

• a nozzle tip including
• a first plane from which liquid is ejected, the first plane perpendicular to an ejection axis;
• a second plane perpendicular to the ejection axis, the second plane being another side plane of the first plane;
• a nozzle hole including
• a discharge groove located in the first plane, the discharge groove having a semi-cylindrical shape extending in a first direction perpendicular to the ejection axis,
• an ejection hole extending along the ejection axis to be connected to the discharge groove, the ejection hole having a right elliptic cylindrical shape having an elliptic cross section with a long diameter extending in the first direction, and
• an introduction portion having a right conical surface centered on the ejection axis, the introduction portion connected to the ejection hole;
• and
• a support having a right cylindrical shape, the support including
• a first bottom surface on substantially the same plane as the second plane,
• a nozzle tip chamber located in the first bottom surface, the nozzle tip chamber receiving the nozzle tip to abut the nozzle tip,
• a second bottom surface being another side surface of the first bottom surface, and
• a jet passage hole extending from the second bottom surface along the ejection axis to be connected to the nozzle tip chamber.