Accession Number : AD0640187
Title : MEASUREMENT OF CAVITY SHAPES ABOVE VENTILATED HYDROFOILS.
Descriptive Note : Technical rept.,
Corporate Author : HYDRONAUTICS INC LAUREL MD
Personal Author(s) : Altmann,R. J.
Report Date : NOV 1965
Pagination or Media Count : 44
Abstract : Recent test programs indicate that theoretical streamlines above a supercavitating hydrofoil may be considerably higher than those actually generated. To check theoretical predictions a three-dimensional traversing probe was constructed and used to map the upper cavity surfaces generated by two different two-dimensional hydrofoils. Experimental contours were found to fall below those predicted by theory at all angles of attack and depths of submergence tested. The rate of change of cavity ordinates with changes in angle of attack or depth of submergence is about the same as that predicted by theory. The contribution of angle of attack to cavity shape is responsible for the greater part of the difference between theoretical and measured cavity shapes. (Author)
Descriptors : (*HYDROFOILS, *CAVITATION), MEASUREMENT, GEOMETRIC FORMS, ANGLE OF ATTACK, FLUID FLOW
Subject Categories : Marine Engineering
Distribution Statement : APPROVED FOR PUBLIC RELEASE