Accession Number : AD0010090


Title :   THE HYDRODYNAMICS OF UNDERWATER JET PROPULSION


Corporate Author : CALIFORNIA INST OF TECH PASADENA HYDRODYNAMICS LAB


Personal Author(s) : O'Neill, J P


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/010090.pdf


Report Date : Mar 1953


Pagination or Media Count : 8


Abstract : 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-ft/sec 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 CD+CDO(1 + K).


Descriptors :   *WATERJET PROPULSION , MEASUREMENT , PARAMETERS , GRAPHS , SHAPE , SENSITIVITY , NOSES , CONICAL BODIES , FORCE(MECHANICS) , CAVITATION , UNDERWATER PROPULSION , ANGLES , BALANCE


Subject Categories : Submarine Engineering


Distribution Statement : APPROVED FOR PUBLIC RELEASE