ON THE RELATION BETWEEN CAVITATION INCEPTION AND FLOW PATTERN ON PROPELLER BLADES

Oil flow visuallization on the model propellers with and without tripping devices atthe leading edge is revealed in this paper. Roughing leading edge with sand blasting was to simu-late the flow at full-scale condition. The observations of cavitation inception and the detection ofcavitation erosion were made in uniform and non-uniform flow respectively so as to consider theeffects of flow pattern on cavitation inception and to investigate the causes of difference in thelocations of cavitation erosion between model propeller and prototype. In addition, calculationsof the pressure distributions and the behaviour of boundary layer on the propeller blade were alsodone by using theoretical method. It is necessary to gain a better understanding of cavitation in-ception of the propeller.

ON THE RELATION BETWEEN CAVITATION INCEPTION AND FLOW PATTERN ON PROPELLER BLADES

Oil flow visuallization on the model propellers with and without tripping devices at the leading edge is revealed in this paper. Roughing leading edge with sand blasting was to simu- late the flow at full-scale condition. The observations of cavitation inception and the detection of cavitation erosion were made in uniform and non-uniform flow respectively so as to consider the effects of flow pattern on cavitation inception and to investigate the causes of difference in the locations of cavitation erosion between model propeller and prototype. In addition, calculations of the pressure distributions and the behaviour of boundary layer on the propeller blade were also done by using theoretical method. It is necessary to gain a better understanding of cavitation in- ception of the propeller.