Accession Number : ADD014708

Title :   Fluid Mixing Device Having a Conical Inlet and a Noncircular Outlet.

Descriptive Note : Patent, Filed 12 Apr 88, patented 18 Sep 90,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Schadow, Klaus C ; Gutmark, Ephraim ; Wilson, Kenneth J ; Smith, Robert A

Report Date : 18 Sep 1990

Pagination or Media Count : 17

Abstract : The patent is directed to a fluid mixing device in which a jet of first fluid is passed through a nozzle having a conical inlet section and a noncircular, elongated, exit section. The jet of first fluid mixes with a second fluid located downstream of the device. In operation, the intersection of the conical and elongated sections produces axial rotation in the first fluid. Intense, three-dimensional, axial and circumferential vortical structures are created. These structures then interact with the high modes of azimuthal instabilities that are common to the elongated configuration. The jet of first fluid evolves into two secondary jets, generating a double shear layer inside the flow. Highly efficient mixing of the fluids, in both the outside and inside (core) segments of the jet, is achieved within a relatively small mixing space. (JHD)

Descriptors :   *MIXERS(MECHANICAL), *JET MIXING FLOW, *PATENTS, CONICAL BODIES, EFFICIENCY, EXITS, FLUIDS, INLETS, LAYERS, ROTATION, SHEAR PROPERTIES, STRUCTURAL PROPERTIES, VORTICES

Subject Categories : Hydraulic and Pneumatic Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE