Noise abating sleeve
AssigneeThe United States of America as represented by the Secretary of the Navy
InventorsGeorge P. Kalaf, Irvin C. Henschen
Life of this patent
Estimating the term…
Abstract
In an acoustic homing torpedo having a transducer section mounted forward the nose shell, an elastomeric, acoustically transparent sleeve is installed over the torpedo nose section and extends aft of the discontinuity at the transducer/nose section interface, thereby reducing the torpedo self-noise generated by cavitation occurring at the discontinuity.
Claims8
In a torpedo having a nose section formed of an acoustic transducer section affixed to the forward end of a torpedo nose shell, a method for reducing the flow induced self-noise generated by said torpedo as it travels through the water comprising the steps of:
- fabricating an elastomeric, acoustically transparent sleeve conforming to the shape of said torpedo nose section, said sleeve having a trailing edge extending well aft of the interface between said transducer section and said nose shell;
- installing said sleeve over said torpedo nose section in such a manner that all voids and air bubbles are removed from between said sleeve and the surface of said torpedo;
- buffing the surface of said sleeve to obtain the desired level of smoothness;
- and
- tapering the trailing edge of said sleeve so as to minimize turbulance at the interface between said trailing edge and the surface of said torpedo.
In a torpedo having a nose section formed of an acoustic transducer section affixed to the forward end of a torpedo nose shell, a noise abating device for reducing torpedo self-noise comprising:
- an elongated sleeve having a closed forward end and an open aft end and conforming to the shape of said torpedo nose section, said sleeve being installed thereon;
- said sleeve further being formed of an elastomeric, acoustically transparent materials having a smooth outer surface, said sleeve having a sufficient length so that said open end extends well aft of the interface between said transducer section and said nose shell when said sleeve is installed over said torpedo nose section;
- said sleeve further having a tapered trailing edge about the circumference of said aft end.
Dependencies are inferred from the claim text.