Claims
- 1. A ship propeller comprising, a plurality of blade means each having a leading edge portion and a rearward facing power face, passageway means extending along the leading edge portion of each blade, said passageway means being defined by a generally triangular cross-section length of tubing, one exterior surface of said triangular tubing being secured by brazing to a leading edge portion of said blade means, and rearwardly inclined orifice means in the other two surfaces of said triangular tubing placing said passageway means in communication with the rear power face and opposite face of each blade for permitting a viscoelastic polymer to be discharged therefrom to suppress formation of turbulent flow along said power face and opposite face.
- 2. The method of raising the propulsion efficiency of a propeller by reducing its viscous drag, said propeller having a plurality of blades each of which have a rearwardly facing power face comprising the step of injecting a minute quantity of polyoxyethylene fluid polymer solution along and from the leading edge of the power face of each propeller blade to form a boundary layer solution adjacent said power face having a polymer concentration of less than 100 ppm to suppress turbulence thereover.
- 3. The method of raising the propulsion efficiency of a propeller by reducing its viscous drag, said propeller having a plurality of blades comprising the step of injecting a minute quantity of diluted liquid polyoxyethylene polymer first solution along the leading edge on each side of each propeller blade to form a liquid boundary layer second solution adjacent each blade having a polymer concentration of less than 100 ppm to suppress the start of turbulent fluid flow thereover.
- 4. The method of adapting bladed propellers for increased propulsive efficiency comprising the steps of forming a mounting surface on the leading edge of each blade, securing a tubular passageway means upon said mounting surface, and pumping and controlling the flow of a minute quantity of liquid polyoxyethylene polymer into said passageway means and outwardly therefrom through apertures therein onto both sides of each blade in a rearward direction to form a liquid boundary layer solution adjacent each blade having a polymer concentration of less than 10 ppm to suppress the start of turbulent fluid flow thereover.
- 5. The method of adapting one or more blades of a bladed ship's propeller with a polymer injection passageway along a leading edge thereof comprising the steps of blunting the cross-sectional contour of the leading edge portion of said blade, brazing a first side of generally triangular cross-section length of tubing to the blunted leading edge of said blade to thereby restore the original cross-sectional contour, and forming a plurality of rearwardly inclined apertures in the second and third sides of said triangular tubing.
Parent Case Info
This application is a Continuation-in-Part of Applicant's prior co-pending application, Ser. No. 494,698 filed Oct. 11, 1965, now abandoned.
US Referenced Citations (3)
Foreign Referenced Citations (3)
Number |
Date |
Country |
16122 OF |
Jan 1884 |
GBX |
3330 OF |
Jan 1890 |
GBX |
239 OF |
Jan 1892 |
GBX |
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
494698 |
Oct 1965 |
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