Other

Northrop Grumman Systems Corporation

Ralph Cornelius Griffin, Jr

William David Bard

John F Ramo

David Brian Schein

A sound suppressor exhaust structure for a jet engine. The exhaust structure has a nozzle body having a generally cylindrical forward intake opening to accommodate an aft end of a jet engine, and a generally quadrilateral aft exit opening. An openable sound suppression chamber is situated aft of the exit opening and is formed by two opposing enclosure structures each having a major surface and each hingedly attached in a clamshell manner to the nozzle body. The opposing enclosure structures are movable between an open and a closed configuration such that, when the enclosure structures are closed, a chamber having a generally quadrilateral cross section is defined and situated aft of the exit opening. Each enclosure structure has a major surface through which are substantially uniformly disposed a plurality of small apertures such that from about 15% to about 25% per square foot of each major surface is void and from about 45 to about 65 apertures are provided per square foot. The apertures here defined are small and tightly spaced to thereby beneficially result in aggressive noise suppression as well as structural light weight.

Sound suppressor exhaust structure

A drum is mounted for rotation about an axis. Its surface is substantially cylindrical about the axis, and axially mounted outside of the surface is a plurality of vanes each defining a slot with respect to the surface. The slot is an aerodynamic slot where accelerating air decreases pressure to produce thrust which is in the direction of rotation. The outer surface of the drum is not quite cylindrical, but is shaped to be of larger diameter at the slot to enhance Venturi action.

Growing community of inventors

Los Alamitos, CA, United States of America

Ralph Cornelius Griffin, Jr