Accession Number : AD0759046

Title :   An Experimental Study of the Ventilation of Blunt-Based Surface-Piercing Struts.

Descriptive Note : Final rept. Nov 71-Dec 72,

Corporate Author : LOCKHEED MISSILES AND SPACE CO INC SUNNYVALE CALIF

Personal Author(s) : Kramer,Ray L.

Report Date : NOV 1972

Pagination or Media Count : 60

Abstract : An experimental program was conducted in the Lockheed Underwater Missile Facility to investigate the ventialation characteristics for surface-piercing blunt-based struts in calm water and in waves. Struts with two leading-edge configurations, one sharp and one blunt, were tested, and the ventilation characteristics are compared with those previously obtained for struts with streamlined trailing edges to determine the effects of the blunt base. The experiments were performed at low ambient pressures to obtain ventilation inception under simultaneous Froude and cavitation number scaled conditions. Performance comparisons are made at strut yaw angles of six and eight degrees on the bases of resistance to ventilation and of the effects on hydrodynamic forces when ventilation occurs. (Author Modified Abstract)

Descriptors :   (*HYDROFOILS, FLUID DYNAMICS), CAVITATION, VENTILATION, WATER WAVES, BLUNT BODIES, LEADING EDGES, MODEL TESTS

Subject Categories : Marine Engineering
      Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE