WO2005105562A1 - Dispositif d'amelioration pour la propulsion marine - Google Patents

Dispositif d'amelioration pour la propulsion marine Download PDF

Info

Publication number
WO2005105562A1
WO2005105562A1 PCT/IL2005/000454 IL2005000454W WO2005105562A1 WO 2005105562 A1 WO2005105562 A1 WO 2005105562A1 IL 2005000454 W IL2005000454 W IL 2005000454W WO 2005105562 A1 WO2005105562 A1 WO 2005105562A1
Authority
WO
WIPO (PCT)
Prior art keywords
gate
enhancement device
conduit
seawater
discharge vent
Prior art date
Application number
PCT/IL2005/000454
Other languages
English (en)
Inventor
Naphtali Koder
Original Assignee
Naphtali Koder
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Naphtali Koder filed Critical Naphtali Koder
Publication of WO2005105562A1 publication Critical patent/WO2005105562A1/fr

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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
    • B63B1/40—Other means for varying the inherent hydrodynamic characteristics of hulls by diminishing wave resistance
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H5/00—Arrangements on vessels of propulsion elements directly acting on water
    • B63H5/07—Arrangements on vessels of propulsion elements directly acting on water of propellers
    • B63H5/14—Arrangements on vessels of propulsion elements directly acting on water of propellers characterised by being mounted in non-rotating ducts or rings, e.g. adjustable for steering purpose
    • 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

Definitions

  • the present invention relates to enhancement of marine propulsion. More particularly, the present invention relates to enhancement device for marine propulsion based on the controlled utilization of the phenomenon of "Water Hammer", which is a wave - movement propagated with the velocity of sound, to sustain a forward low-pressure surge wave with velocity equal to or optimally different from the speed of the vessel.
  • Water Hammer is a wave - movement propagated with the velocity of sound
  • an enhancement device for marine propulsion of marine craft and displacement vessels advancing in seawater comprising: a conduit having a first end and a second side provided with second end; an opening provided in said first end; at least one discharge vent provided in said second end; a gate provided in said second side, wherein said gate is adapted to move between a first position in which said second side is fluidically open and a second position in which said second side is closed; whereby the enhancement device is installed below or slightly above a keel of the marine craft or the displacement vessel while in the first position, seawater is allowed to pass through said conduit and immediately after the second position is established, a formed surge wave exits the conduit through said opening so as to push the barrier of seawater forward.
  • said gate is operated mechanically, pneumatically, hydraulically or electrically. Furthermore, in accordance with a preferred embodiment of the present invention, said gate is further provided with a gate operating unit adapted to repeatedly close and open said gate. Furthermore, in accordance with a preferred embodiment of the present invention, said gate operating unit is electronically communicating with a central control system of the displacement vessel or the marine craft. Furthermore, in accordance with a preferred embodiment of the present invention, said gate is a valve allowing rapid closure. Furthermore, in accordance with a preferred embodiment of the present invention, said second side of said conduit is split into two pipes, each provided with a discharge vent.
  • said discharge vent of one of said two pipes is located at starboard side of the vessel and other discharge vent is provided at port side. Furthermore, in accordance with a preferred embodiment of the present invention, said first end is provided with a coarse filter.
  • an enhancement device for marine propulsion of marine craft and displacement vessels advancing in seawater comprising: a conduit having a first end and a second side provided with second end; an opening provided in said first end; a booster pump provided in said first side adapted to facilitate advancement of seawater in said conduit; a one way valve provided in said first side adapted to allow seawater to flow solely to said second side; at least one discharge vent provided in said second end; a gate provided in said second side, wherein said gate is adapted to move between a first position in which said second side is fluidically open and a second position in which said second side is closed; an outlet conduit diverted from said first side allowing seawater to exit said conduit when said gate is closed; a second gate is provided in said outlet conduit wherein when said gate is in said first position, said second gate is closed and when said gate is in said second position, said second gate is open; whereby the enhancement device is installed below or slightly above a keel of the marine craft or
  • Figure 1 illustrates a side view of a ship provided with an enhancement device of marine propulsion showing a preferred location of the device in accordance with a preferred embodiment of the present invention.
  • Figure 2 illustrates the parts of an enhancement device for marine propulsion in accordance with a preferred embodiment of the present invention, incorporated in a ship.
  • Figure 3 illustrates the state of enhancement device for marine propulsion in accordance with a preferred embodiment of the present invention, while seawater freely flows through the device.
  • Figure 4 illustrates the state of the enhancement device shown in Figure 3, while surge wave propagates through the device ahead of the moving ship.
  • Figures 5a, b illustrate another preferred embodiment of the enhancement device for marine propulsion of the present invention.
  • the marine enhancement device of the present invention is based on the controlled utilization of the phenomenon of 'Hydraulic Transient' or 'Water Hammer' to sustain a forward low-pressure surge wave with velocity equal to or optimally different from the speed of the vessel.
  • the enhancement device for marine propulsion of the present invention comprises a conduit of optimum size and length having an opening provided in a first end of optimum size and shape preferably fitted in the stem or at other appropriate location, below the water line of the vessel, or even below, or slightly above its keel.
  • the second side of the conduit is split into two pipes that end in discharge vents located on the starboard and port sides of the ship to allow free flow of seawater through the conduit aft-ward.
  • the conduit is provided with a gate adapted to stop the flow of seawater through the conduit when the gate is closed.
  • the gate is closed and opened by a gate operating unit adapted to automatically and repetitively open and close the gate.
  • the gate is opened and closed with optimum timing so as to sustain a forward low pressure surge wave ahead of the moving ship at a velocity equal to or optimally different from the speed of the vessel.
  • the surge wave pushes the mundanewhile static barrier of seawater forward, so that the ship does not collide against it and waste energy. Since there is no collision with the seawater in front, a bow wave is not formed to interact with the hull and retard the ship.
  • the surge wave reduces frictional loss of the ship, which is proportional to the square of the relative speed of the ship with respect to the mass of sea water in front, by negating or reducing the relative velocity of a portion of the wetted surface of the ship with respect to the moving seawater in front.
  • the enhancement device can be incorporated in the vessel while the vessel is being built or it can be retrofitted in existing vessels.
  • Figure 1 illustrating a side view of a ship provided with an enhancement device of marine propulsion showing a preferred location of the device in accordance with a preferred embodiment of the present invention.
  • An enhancement device for marine propulsion 12 is provided to a ship 10 and located in the forward position of the ship.
  • Enhancement device 12 will be below waterline 14 and will be located in a position where even when the stem is pitching upwardly and downwardly due to the waves, opening 16 of the device will be below waterline 14.
  • Figure 1 also illustrates an enlarged view of the enhancement device in the ship so as to allow an estimation of the size and the location of the device relative to the ship.
  • Figure 2 illustrating the parts of an enhancement device for marine propulsion in accordance with a preferred embodiment of the present invention.
  • Enhancement device 12 is provided with a relatively long conduit 18 having an opening 16 at a front side of the device.
  • Conduit 18 preferably splits into two pipes 19 that are extended to the starboard and port sides of ship 10 and end in discharged vents 22.
  • Conduit 18 is provided with a gate 20 that is adapted to be inserted within conduit 18 so as to abruptly stop the flow of seawater through discharge vents 22.
  • Gate 20 is adapted to move between a position in which it is within conduit 18 and a position in which gate 20 is outside conduit 18 allowing flow of seawater through discharge vents 22.
  • the operation of gate 20 can be mechanically, pneumatically, hydraulically or electrically controlled by gate operating unit 24.
  • the necessary inputs to gate operating unit 24, such as speed of the ship, the desired velocity of the surge wave, the timing of closing and opening the gate, etc. could be provided both manually through controls and automatically from sensors.
  • the gate can be any type of gate valve, disc, or flap that is adapted to rapidly stop the flow of seawater through the conduit upon an order coming from the gate operating unit.
  • FIG 3 illustrating the state of enhancement device for marine propulsion in accordance with a preferred embodiment of the present invention, while seawater freely flows through the device.
  • conduit 18 that splits into two pipes 19 ending in discharge vents 22, is provided with opening 16.
  • seawater 26 enters conduit 18 through opening 16 substantially at a speed that equals the speed of the craft, in the opposite direction indicated by an arrow 30.
  • opening 16 is preferably provided with a coarse filter 17 adapted to prevent debris from entering enhancement device 12.
  • gate 20 After gate 20 is reverted to the external position by gate operating unit 24, seawater flows through conduit 18 and pipes 19. Gate 20 is repeatedly moved across conduit 18 in an inwardly and outwardly manner so as to repeatedly form a propagating surge wave as described herein.
  • the repetitive and rhythmic operation of moving gate 20 into the waterway and out of it are preformed automatically by gate operating unit 24 in order to sustain the forward movement of the surge waves ahead of the ship with optimum speed and pressure.
  • the enhancement device of the present invention produces a forward wave of pressure P and velocity C w . Pressure P is directly proportional to the velocity V of water through the device, the mass density .
  • the enhancement device has to produce a surge wave moving forward at a speed C w where C w is greater than or equal to 12.8 [m/sec].
  • C w the velocity of seawater through the conduit
  • T 900[msec] .
  • the quantity of seawater handled by the device per cycle will be of the order of 10 tonnes, which will entail some losses, which, however, when compared to the enormous gain from the device will be negligible.
  • the time for closing the gate (_) the length of the conduit (J) can also be reduced.
  • the gate can be in the form of fast operating valve, or flap, or disc.
  • Enhancement device 100 is provided with inlet conduit 102 having an opening 104 that can be located not necessarily at the stem of the advancing craft.
  • This device has basically two conduits, a main conduit 18 as in the previous embodiment and an additional secondary outlet conduit 110.
  • Gate control unit 24 operates two gates, gate 20 in the main conduit 18 and gate 21 in the secondary outlet conduit 110.
  • gate 20 When gate 20 is open, gate 21 is closed and vice-versa.
  • Booster pump 106 is provided in inlet conduit 102 so as to increase the velocity of seawater in the conduit.
  • a one way valve 108 is provided to allow one way flow, toward main conduit 18.
  • gate 20 When gate 20 is open, water flows through the conduit and out to the sea through the pipes 19 and discharge vents 22 in a direction indicated by arrows 30, while gate 21 remains closed and prevents water from flowing out through the secondary outlet conduit 110.
  • a surge wave is formed upon closure of gate 20 by gate operating unit 24, as indicated in Figure 5b.
  • surge wave 32 which pushes away the static barrier of seawater in front, propagates through conduit 18 and through a secondary outlet conduit 110 having gate 21 now in an open position.
  • a one way valve 112 is provided in secondary outlet conduit 110 enabling one way flow of the propagating surge wave forward with velocity equal to or greater than the speed of the vessel in the direction of the advancing craft (indicated by arrow 114).
  • the device of the present invention can be employed in most marine crafts including submarines. It should be clear that the description of the embodiments and attached Figures set forth in this specification serves only for a better understanding of the invention, without limiting its scope as covered by the following Claims. It should also be clear that a person skilled in the art, after reading the present specification can make adjustments or amendments to the attached Figures and above described embodiments that would still be covered by the following Claims.

Abstract

La présente invention a trait à un dispositif nouveau et unique pour la propulsion marine d'un bâtiment de surface et le déplacement de navires dans la mer en vue de faciliter un régime de grandes vitesses avec des moteurs de puissance inférieure, entraînant un coût initial plus bas, des volumes de cargo supérieurs, une consommation de combustible inférieure et une plus grande rentabilité. Le dispositif comporte un conduit comprenant une première extrémité et une deuxième extrémité, une ouverture prévue dans la première extrémité, au moins un évent d'évacuation prévue dans la deuxième extrémité et un obturateur prévu dans la deuxième face, l'obturateur étant adapté à un déplacement répété entre une première position dans laquelle la deuxième face présente une ouverture fluidique et une deuxième position dans laquelle la deuxième face est fermée. Le dispositif peut être incorporé dans un navire neuf en construction ou installé après coup sous la forme d'une unité autonome dans des navires plus anciens.
PCT/IL2005/000454 2004-05-05 2005-05-01 Dispositif d'amelioration pour la propulsion marine WO2005105562A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US56812604P 2004-05-05 2004-05-05
US60/568,126 2004-05-05

Publications (1)

Publication Number Publication Date
WO2005105562A1 true WO2005105562A1 (fr) 2005-11-10

Family

ID=35241546

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IL2005/000454 WO2005105562A1 (fr) 2004-05-05 2005-05-01 Dispositif d'amelioration pour la propulsion marine

Country Status (1)

Country Link
WO (1) WO2005105562A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US743171A (en) * 1903-03-07 1903-11-03 Walter Grant Jamieson Vessel.
US1859139A (en) * 1931-09-24 1932-05-17 Michael J Hanlon Bow construction for ships
US3259096A (en) * 1964-03-10 1966-07-05 Bowles Eng Corp Thruster apparatus for craft
US6647909B1 (en) * 2002-10-01 2003-11-18 Richard S. Norek Waveless hull

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US743171A (en) * 1903-03-07 1903-11-03 Walter Grant Jamieson Vessel.
US1859139A (en) * 1931-09-24 1932-05-17 Michael J Hanlon Bow construction for ships
US3259096A (en) * 1964-03-10 1966-07-05 Bowles Eng Corp Thruster apparatus for craft
US6647909B1 (en) * 2002-10-01 2003-11-18 Richard S. Norek Waveless hull

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