Accession Number : ADD015122

Title :   Large Eddy Break-Up Device for Towed Arrays.

Descriptive Note : Patent,Filed 28 Sep 90, patented 28 May 91,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Toplosky, Norman

Report Date : 28 May 1991

Pagination or Media Count : 5

Abstract : A large eddy break-up device for towed acoustic arrays for reducing the flow noise due to the turbulent boundary layer around the towed array is described. It includes two identical halves, each having a circumferential airfoil and two flat flanges which are used to secure it to a coupling on the towed acoustic array and also to integrate the two halves using fasteners. The circumferential foil interferes with the flow noise and large eddys are broken up into easily dissipating small eddys of higher frequency.

Descriptors :   ACOUSTIC ARRAYS, FASTENINGS, FLANGES, FLOW NOISE, FREQUENCY, TOWED ARRAYS, TURBULENT BOUNDARY LAYER

Subject Categories : Fluid Mechanics
      Hydraulic and Pneumatic Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE