Mixing apparatus using a noncircular jet of small aspect ratio

Apparatus for mixing fluids, comprising:

• first fluid conductive means terminating in at least one noncircular orifice for emitting a jet of a first fluid along a path in a preselected direction, the orifice having unequal major and minor axis dimensions with the major axis dimension being less than five times the minor axis dimension;
• means for providing a second fluid at a location immediately downstream of the orifice for mixing with the first fluid;
• and
• means for defining a mixing region extending downstream of the orifice a distance of at least three times the minor axis dimension, and having a lateral width of at least 2(a+0.4x) in a direction parallel to the major axis and a lateral width of at least 2(b+0.4x) in a direction parallel to the minor axis, where a and b are one-half the major and minor axis dimensions, respectively, and x is the distance downstream of the orifice.

Apparatus for mixing fluids, comprising:

• first fluid conductive means terminating in at least one noncircular orifice for emitting a jet of a first fluid along a path in a preselected direction, the orifice having unequal major and minor axis dimensions with the major axis dimension being less than five times the minor axis dimension;
• means for providing a second fluid at a location immediately downstream of the orifice for mixing with the first fluid;
• and
• wall means in the path of the jet and substantially perpendicular to said preselected direction, the wall means being downstream of the orifice a distance at least equal to the minor axis dimension;
• the orifice not diverging from the preselected direction by an acute angle of more than seven (7) degrees.