초록 ▼

The invention 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 invention 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.

대표청구항 ▼

A fluid mixing device in which a first fluid flows through the device in a predetermined direction and mixes with a second fluid located downstream of the device, the device comprising: a generally conical section substantially axially aligned with said direction of flow and having a large dimension

A fluid mixing device in which a first fluid flows through the device in a predetermined direction and mixes with a second fluid located downstream of the device, the device comprising: a generally conical section substantially axially aligned with said direction of flow and having a large dimension in substantially a circular orifice through which said first fluid enters, said conical section having an interior surface extending from said circular orifice and converging toward a small dimension of said conical section; a noncircular section having an interior surface generally parallel to said direction of flow and abruptly intersecting said interior surface of said conical section, said interior surface of said noncircular section extending from said circular orifice and terminating in a noncircular orifice through which said first fluid exits, said noncircular orifice having an elliptical shape, said elliptical shape having a major axis dimension and a minor axis dimension, said dimensions being unequal and at substantially right angle to each other, said major axis dimension being no greater than said large dimension of said conical section and said minor axis dimension being approximately equal to said small dimension of said conical section; means between said conical section and said noncircular section for generating axial vortices and azimuthal instabilities; and said fluid mixing device having a fixed shape.