Arrangement for controlling fluid jets injected into a fluid stream
First Claim
1. A method of mixing cross-streams of a primary fluid stream and a secondary fluid stream flowing in a first direction substantially parallel to and over a surface of a wall, said method comprising:
- forming an opening with an airfoil profile in said wall oriented at an angle of attack, α
, with respect to said first direction; and
causing said first fluid stream to flow through said opening so as to be mixed with said secondary fluid,wherein said airfoil profile has a leading edge and a trailing edge downstream of the leading edge and at which the airfoil profile converges to a sharp cusp,wherein said wall is part of a jet engine combustion chamber, andwherein said primary fluid stream is quench air and wherein said secondary fluid stream is front-end air.
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Abstract
In an air mixing arrangement wherein a primary fluid is introduced through an opening in a wall to be mixed with a secondary fluid flowing along the wall surface, the opening is airfoil shaped with its leading edge being orientated at an attack angle with respect to the secondary fluid flow stream to enhance penetration and dispersion of the primary fluid stream into the secondary fluid stream. The airfoil shaped opening 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. Embodiments of the arrangement can comprise a collar around the openings, multiple openings that comprise a larger opening and a smaller opening positioned downstream, pairs of openings and associated collars symmetric relationship, and nozzles on the inner side of the wall.
784 Citations
15 Claims
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1. A method of mixing cross-streams of a primary fluid stream and a secondary fluid stream flowing in a first direction substantially parallel to and over a surface of a wall, said method comprising:
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forming an opening with an airfoil profile in said wall oriented at an angle of attack, α
, with respect to said first direction; andcausing said first fluid stream to flow through said opening so as to be mixed with said secondary fluid, wherein said airfoil profile has a leading edge and a trailing edge downstream of the leading edge and at which the airfoil profile converges to a sharp cusp, wherein said wall is part of a jet engine combustion chamber, and wherein said primary fluid stream is quench air and wherein said secondary fluid stream is front-end air. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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Specification