Accession Number : ADA030726


Title :   Calculated and Observed Speeds of Cavitation About Two- and Three- Dimensional Bodies in Water


Corporate Author : DAVID TAYLOR MODEL BASIN WASHINGTON DC


Personal Author(s) : Freeman, Hugh B


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a030726.pdf


Report Date : Nov 1942


Pagination or Media Count : 23


Abstract : The computed cavitation speeds for a wide variety of two- and three- dimensional body forms are presented, together with the observed cavitation speeds of nine model sound-projector domes tested in the 24-inch variable pressure water tunnel of the David W. Taylor Model Basin. One of the most interesting and important findings of the theoretical investigation is the fact that an elliptical shape for either a two- or a three-dimensional body has the highest cavitation speed of all the shapes calculated. Conventional streamlined forms have relatively low cavitation speeds. A body form was developed at the Taylor Model Basin designed to utilize the high cavitation speed of the ellipse and to retain the low drag characteristics of the streamlined form. Models based on this form gave the highest cavitation speeds of any observed in the test program. Cavitation on sound-projector domes may be avoided, throughout the speed range of the fastest vessels, by the proper choice of form and length- diameter ratio.


Descriptors :   *HYDRODYNAMIC CONFIGURATIONS , *CAVITATION , *SONAR DOMES , CYLINDRICAL BODIES , DRAG , CAVITATION NOISE , WATER TUNNELS , BODIES OF REVOLUTION , POTENTIAL THEORY , THREE DIMENSIONAL , TWO DIMENSIONAL , OPTIMIZATION , EDDY CURRENTS


Subject Categories : Fluid Mechanics


Distribution Statement : APPROVED FOR PUBLIC RELEASE