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THE HYDRODYNAMICS OF UNDERWATER JET PROPULSION
CALIFORNIA INST OF TECH PASADENA HYDRODYNAMICS LAB
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Force measurements were obtained with a new sensitive balance for a range of nose shapes and cavitation parameters K under conditions of open- cavity flow. Drag-coefficient CD data were obtained for a 12- to 25-ftsec range on model sizes ranging from 0.500 to 1.414 in. in diameter for the sharper cone. The experiments indicate a remarkable consistency and a close check with the theory. Two exceptions were noted flow discrepancies, about sharphy pointed cones, with those indicated by the approximate cavity-drag theory of Plesset and Shaffer and definite slope differences which increase with decreasing cone angle of the experimental curve with the line given by CDCDO1 K.
APPROVED FOR PUBLIC RELEASE