GB373970A - Improvements in or relating to means for reducing frictional resistance of fluids along solid walls - Google Patents
Improvements in or relating to means for reducing frictional resistance of fluids along solid wallsInfo
- Publication number
- GB373970A GB373970A GB35493/30A GB3549330A GB373970A GB 373970 A GB373970 A GB 373970A GB 35493/30 A GB35493/30 A GB 35493/30A GB 3549330 A GB3549330 A GB 3549330A GB 373970 A GB373970 A GB 373970A
- Authority
- GB
- United Kingdom
- Prior art keywords
- blades
- ship
- angle
- fluid
- pipe
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B1/00—Hydrodynamic or hydrostatic features of hulls or of hydrofoils
- B63B1/32—Other means for varying the inherent hydrodynamic characteristics of hulls
- B63B1/34—Other means for varying the inherent hydrodynamic characteristics of hulls by reducing surface friction
- B63B1/38—Other means for varying the inherent hydrodynamic characteristics of hulls by reducing surface friction using air bubbles or air layers gas filled volumes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B1/00—Hydrodynamic or hydrostatic features of hulls or of hydrofoils
- B63B1/32—Other means for varying the inherent hydrodynamic characteristics of hulls
- B63B1/34—Other means for varying the inherent hydrodynamic characteristics of hulls by reducing surface friction
- B63B1/38—Other means for varying the inherent hydrodynamic characteristics of hulls by reducing surface friction using air bubbles or air layers gas filled volumes
- B63B2001/387—Other means for varying the inherent hydrodynamic characteristics of hulls by reducing surface friction using air bubbles or air layers gas filled volumes using means for producing a film of air or air bubbles over at least a significant portion of the hull surface
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T70/00—Maritime or waterways transport
- Y02T70/10—Measures concerning design or construction of watercraft hulls
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Combined Devices Of Dampers And Springs (AREA)
Abstract
373,970. Reducing surface friction. LECOQ, H., 12, Boulevard du President Felix Faure, St-Adresse, Seine Inferieure, France. Nov. 25, 1930, No. 35493. Convention date, Aug. 1. Void [Published under Sect. 91 of the Acts]. [Classes 4 and 113 (i).] The invention relates to means for reducing the frictional resistance of fluids moving relatively to solid walls. In the application to ships the bow of a ship is provided with two blades b, Fig.1, set at an angle so as to provide a diverging passage e, f for the fluid passing the stem of the ship, the means of attachment c may be adjustable and the angle of the blade on one side may be different from that on the other. In a modification additional smaller vanes are placed between the hull and the main vanes. Similar blades may also be disposed along the side of the ship. In another arrangement, Fig. 5, the blades are. joined at the front and liquid is pumped into the space between them. Instead of blades, passages h admitting fluid to a chamber j, Fig. 7, in the bow are provided and the liquid allowed to pass out at an angle rearwardly through passages i. These arrangements are stated to be applicable to submarines, locomotive torpedoes, projectiles, dirigibles, aeroplanes and hydro-aeroplanes. In a further application to the passage of fluid along a pipe or canal, the bore is provided with a tapered ring, with generatrix m, n having its large dimension, Fig. 9, facing the fluid flow. This ring may have smaller cones inside it. In a modification the pipe is enlarged at the position where it carries these internal members and they are provided with conoidal outer surfaces instead of conical ones in conformity with the shape of the enlargement of the pipe diameter.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR373970X | 1930-08-01 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB373970A true GB373970A (en) | 1932-06-02 |
Family
ID=8894875
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB35493/30A Expired GB373970A (en) | 1930-08-01 | 1930-11-25 | Improvements in or relating to means for reducing frictional resistance of fluids along solid walls |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB373970A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE931090C (en) * | 1952-11-11 | 1955-08-01 | Heinrich Kuckuck | Device for reducing the bow wave in watercraft |
| GB2149054A (en) * | 1983-10-25 | 1985-06-05 | Koezponti Valto Hitelbank | Method and construction for reducing the drag of bodies arranged in a flow |
| EP0280456A2 (en) * | 1987-02-24 | 1988-08-31 | Ulf Harry Stanford | Bow foil |
| US5090352A (en) * | 1987-02-24 | 1992-02-25 | Corwin R. Horton | Bow foil |
| GB2415164A (en) * | 2003-11-27 | 2005-12-21 | Nicholas Paul Robinson | Vortex streaming apparatus for reducing hull drag |
| CN108545145A (en) * | 2018-06-14 | 2018-09-18 | 哈尔滨工业大学 | A kind of flow control method inhibiting underwater sailing body works surface cavitation phenomenon |
| CN108974244A (en) * | 2018-07-13 | 2018-12-11 | 浙江大学 | A kind of ship ventilation drag reduction structures |
| EP3296192B1 (en) * | 2016-09-15 | 2019-07-03 | Klaus Willmann | Impact-reducing flow deflector for the surface of flow bodies impacted by the flow |
-
1930
- 1930-11-25 GB GB35493/30A patent/GB373970A/en not_active Expired
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE931090C (en) * | 1952-11-11 | 1955-08-01 | Heinrich Kuckuck | Device for reducing the bow wave in watercraft |
| GB2149054A (en) * | 1983-10-25 | 1985-06-05 | Koezponti Valto Hitelbank | Method and construction for reducing the drag of bodies arranged in a flow |
| EP0280456A2 (en) * | 1987-02-24 | 1988-08-31 | Ulf Harry Stanford | Bow foil |
| EP0280456A3 (en) * | 1987-02-24 | 1988-12-14 | Ulf Harry Stanford | Bow foil |
| US5090352A (en) * | 1987-02-24 | 1992-02-25 | Corwin R. Horton | Bow foil |
| GB2415164A (en) * | 2003-11-27 | 2005-12-21 | Nicholas Paul Robinson | Vortex streaming apparatus for reducing hull drag |
| GB2415164B (en) * | 2003-11-27 | 2007-01-03 | Nicholas Paul Robinson | Marine drag-reduction and propulsion system |
| EP3296192B1 (en) * | 2016-09-15 | 2019-07-03 | Klaus Willmann | Impact-reducing flow deflector for the surface of flow bodies impacted by the flow |
| CN108545145A (en) * | 2018-06-14 | 2018-09-18 | 哈尔滨工业大学 | A kind of flow control method inhibiting underwater sailing body works surface cavitation phenomenon |
| CN108974244A (en) * | 2018-07-13 | 2018-12-11 | 浙江大学 | A kind of ship ventilation drag reduction structures |
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