Arrangement for controlling fluid jets injected into a fluid stream

摘要

In an air mixing arrangement wherein a primary fluid is introduced through an opening (200) in a wall (100) to be mixed with a secondary fluid flowing along the wall surface, the opening (200) is airfoil shaped with its leading edge (205) being orientated at an attack angle with respect to the secondary fluid flow stream so as to thereby enhance the penetration and dispersion of the primary fluid stream into the secondary fluid stream. The airfoil shaped opening (201,202) is selectively positioned such that its angle of attack provides the desired lift to optimize the mixing of the two streams for the particular application. In one embodiment (FIG. 3), a collar (220) is provided around the opening to prevent the secondary fluid from contacting the surface of the wall (100) during certain conditions of operation. Multiple openings (201,202, FIG. 4) maybe used such as the combination of a larger airfoil shaped opening (201) with a smaller airfoil shaped opening (202) positioned downstream thereof, or (FIG. 5) a round shaped opening (400) placed upstream of an airfoil shaped opening (410). Pairs of openings and associated collars maybe placed in symmetric relationship so as to promote mixing in particular applications, and nozzles maybe placed on the inner side of wall to enhance the flow characteristics of the primary fluid.