Boundary layer control of aerodynamic airfoils
OwnerLorenzo Battistiinventor
Life of this patent
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Abstract
Boundary layer control of a structural element in fluid stream is achieved by the following operations: providing in such structural element at least one region equipped with micro porous structure by an electroforming technique; having a fluid stream flow through the external surface of the at least one region, inwards or outwards with respect to the environment in which that element is placed.
Claims29
A method for achieving boundary layer control of a structural element in a fluid stream, wherein:
- providing such structural element at least one region having a microporous structure produced by means of an electrolytic electroforming procedure in which there is deposition of a metal or metal alloy on a matrix arranged at the cathode and having a hollow imprint suitable for creating conductive areas separated by insulating areas by filling with dielectric resins that constitute the electroformed holes, the microporous structure having an external surface that is smooth and devoid of roughness and crossed by micro-holes in correspondence to the insulating areas of the matrix, and
- having a secondary fluid stream flowing through said at least one region towards or away from the external surface of the structural element in such a way to achieve a boundary layer control on said external surface thereof, said microporous structure produced by the means of an electrolytic electroforming procedure being directly fabricated from a single deposition procedure of said metal or metal alloy on said matrix arranged at the cathode.
A structural element which is to be subjected to the action of a fluid stream at an external surface thereof when in use, having at least one region provided with a microporous structure produced means of an electrolytic electroforming procedure in which there is a deposition of a metal or metal alloy on a matrix arranged at the cathode and having a hollow imprint suitable for creating conductive areas separated by insulating areas by filling with dielectric resins that constitute the electroformed holes, the microporous structure having an external surface that is smooth and devoid of roughness and crossed by micro-holes in correspondence with the insulating areas of the matrix, whereby a boundary layer control at the external surface of the structural element is obtained as a result of a secondary fluid stream flowing through said at least one region towards or away from said external surface;
- said microporous structure produced by the means of an electrolytic electroforming procedure being directly fabricated from a single deposition procedure of said metal or metal alloy on said matrix arranged at the cathode.
A structural element, in particular of a turbo engine, the structural element being subjected to the action of a fluid stream at an external surface thereof when in use, having at least one region provided with a microporous structure produced by means of an electrolytic electroforming procedure, wherein a deposition of a metal or metal alloy on a matrix arranged at the cathode and having a hollow imprint suitable for creating conductive areas separated by insulating areas by filing with dielectric resins that constitute the electroformed holes is produced, said microporous structure having an external surface that is smooth and devoid of roughness and being crossed by micro-holes in correspondence with the insulating areas of said matrix, wherein said microporous structure produced by the means of an electrolytic electroforming procedure is directly fabricated from a single deposition procedure of said metal or metal alloy on said matrix arranged at the cathode.
A turbo engine comprising a structural element subjected to the action of a fluid stream at an external surface thereof when in use, such a structural element having at least one region provided with a microporous structure produced by means of an electrolytic electroforming procedure wherein the deposition of a metal or metal alloy on a matrix arranged at the cathode and having a hollow imprint suitable for creating conductive areas separated by insulating areas by filling with dielectric resins that constitute the electroformed holes, the microporous structure being crossed by micro-holes in correspondence with the insulating areas of the matrix, whereby a boundary layer control at the external surface of the structural element is obtained as a result of a secondary fluid stream flowing through said at least one region toward or away from said external surface;
- said microporous structure produced by the means of an electrolytic electroforming procedure being directly fabricated from a single deposition procedure of said metal or metal alloy on said matrix arranged at the cathode.
Dependencies are inferred from the claim text.