FR2230541A2 - Drag reduction system for ship's hulls - uses large velocity gradient layer of air injected beneath hull - Google Patents

Drag reduction system for ship's hulls - uses large velocity gradient layer of air injected beneath hull

Info

Publication number
FR2230541A2
FR2230541A2 FR7307442A FR7307442A FR2230541A2 FR 2230541 A2 FR2230541 A2 FR 2230541A2 FR 7307442 A FR7307442 A FR 7307442A FR 7307442 A FR7307442 A FR 7307442A FR 2230541 A2 FR2230541 A2 FR 2230541A2
Authority
FR
France
Prior art keywords
hull
air
ship
hulls
velocity gradient
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.)
Granted
Application number
FR7307442A
Other languages
English (en)
Other versions
FR2230541B2 (fr
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
FIACRE JEAN MARIE
Original Assignee
FIACRE JEAN MARIE
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
Priority to FR7301220A priority Critical patent/FR2230540A1/fr
Application filed by FIACRE JEAN MARIE filed Critical FIACRE JEAN MARIE
Priority to FR7307442A priority patent/FR2230541A2/fr
Priority to FR7313276A priority patent/FR2283045A2/fr
Priority to FR7325258A priority patent/FR2236717A2/fr
Publication of FR2230541A2 publication Critical patent/FR2230541A2/fr
Priority to FR7628152A priority patent/FR2364809A2/fr
Application granted granted Critical
Publication of FR2230541B2 publication Critical patent/FR2230541B2/fr
Granted legal-status Critical Current

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)
  • Ocean & Marine Engineering (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Other Liquid Machine Or Engine Such As Wave Power Use (AREA)
  • Jet Pumps And Other Pumps (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Fluid-Damping Devices (AREA)
  • Vibration Prevention Devices (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Magnetic Bearings And Hydrostatic Bearings (AREA)
  • Underground Or Underwater Handling Of Building Materials (AREA)
FR7307442A 1973-01-15 1973-03-02 Drag reduction system for ship's hulls - uses large velocity gradient layer of air injected beneath hull Granted FR2230541A2 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
FR7301220A FR2230540A1 (en) 1973-01-15 1973-01-15 Method of reducing drag on ships hulls - layer of air around hull is formed from fresh air and air within layer
FR7307442A FR2230541A2 (en) 1973-01-15 1973-03-02 Drag reduction system for ship's hulls - uses large velocity gradient layer of air injected beneath hull
FR7313276A FR2283045A2 (fr) 1973-01-15 1973-04-12 Procede permettant de realiser une diminution de la resistance a l'avancement d'un navire
FR7325258A FR2236717A2 (en) 1973-01-15 1973-07-10 Ship hull resistance reduction process - distributes air under hull from assembly moving in and out from centre
FR7628152A FR2364809A2 (fr) 1973-01-15 1976-09-20 Procede permettant de realiser une diminution de la resistance a l'avancement d'un navire

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
FR7301220A FR2230540A1 (en) 1973-01-15 1973-01-15 Method of reducing drag on ships hulls - layer of air around hull is formed from fresh air and air within layer
FR7307442A FR2230541A2 (en) 1973-01-15 1973-03-02 Drag reduction system for ship's hulls - uses large velocity gradient layer of air injected beneath hull
FR7313276A FR2283045A2 (fr) 1973-01-15 1973-04-12 Procede permettant de realiser une diminution de la resistance a l'avancement d'un navire
FR7325258A FR2236717A2 (en) 1973-01-15 1973-07-10 Ship hull resistance reduction process - distributes air under hull from assembly moving in and out from centre
FR7628152A FR2364809A2 (fr) 1973-01-15 1976-09-20 Procede permettant de realiser une diminution de la resistance a l'avancement d'un navire

Publications (2)

Publication Number Publication Date
FR2230541A2 true FR2230541A2 (en) 1974-12-20
FR2230541B2 FR2230541B2 (fr) 1977-08-05

Family

ID=61021871

Family Applications (5)

Application Number Title Priority Date Filing Date
FR7301220A Granted FR2230540A1 (en) 1973-01-15 1973-01-15 Method of reducing drag on ships hulls - layer of air around hull is formed from fresh air and air within layer
FR7307442A Granted FR2230541A2 (en) 1973-01-15 1973-03-02 Drag reduction system for ship's hulls - uses large velocity gradient layer of air injected beneath hull
FR7313276A Pending FR2283045A2 (fr) 1973-01-15 1973-04-12 Procede permettant de realiser une diminution de la resistance a l'avancement d'un navire
FR7325258A Granted FR2236717A2 (en) 1973-01-15 1973-07-10 Ship hull resistance reduction process - distributes air under hull from assembly moving in and out from centre
FR7628152A Granted FR2364809A2 (fr) 1973-01-15 1976-09-20 Procede permettant de realiser une diminution de la resistance a l'avancement d'un navire

Family Applications Before (1)

Application Number Title Priority Date Filing Date
FR7301220A Granted FR2230540A1 (en) 1973-01-15 1973-01-15 Method of reducing drag on ships hulls - layer of air around hull is formed from fresh air and air within layer

Family Applications After (3)

Application Number Title Priority Date Filing Date
FR7313276A Pending FR2283045A2 (fr) 1973-01-15 1973-04-12 Procede permettant de realiser une diminution de la resistance a l'avancement d'un navire
FR7325258A Granted FR2236717A2 (en) 1973-01-15 1973-07-10 Ship hull resistance reduction process - distributes air under hull from assembly moving in and out from centre
FR7628152A Granted FR2364809A2 (fr) 1973-01-15 1976-09-20 Procede permettant de realiser une diminution de la resistance a l'avancement d'un navire

Country Status (1)

Country Link
FR (5) FR2230540A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2364809A2 (fr) * 1973-01-15 1978-04-14 Fiacre Jean Marie Procede permettant de realiser une diminution de la resistance a l'avancement d'un navire

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2607098A1 (fr) * 1986-11-24 1988-05-27 Pingon Pierre De Catamaran a effet de surface
US6092480A (en) * 1997-08-01 2000-07-25 Ishikawajima-Harima Heavy Industries Co., Ltd. Generation of bubbles for friction-reducing ship and method for reducing skin-friction
EP3290324A1 (fr) * 2016-08-30 2018-03-07 Silverstream Technologies B.V. Système de lubrification par air à double cavité

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3040688A (en) * 1957-11-07 1962-06-26 Gram Knud Fini Ship having an air cushion under the bottom
FR2230540A1 (en) * 1973-01-15 1974-12-20 Fiacre Jean Marie Method of reducing drag on ships hulls - layer of air around hull is formed from fresh air and air within layer

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
NEANT *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2364809A2 (fr) * 1973-01-15 1978-04-14 Fiacre Jean Marie Procede permettant de realiser une diminution de la resistance a l'avancement d'un navire

Also Published As

Publication number Publication date
FR2283045A2 (fr) 1976-03-26
FR2230541B2 (fr) 1977-08-05
FR2236717A2 (en) 1975-02-07
FR2364809B1 (fr) 1979-01-12
FR2230540A1 (en) 1974-12-20
FR2236717B2 (fr) 1977-12-23
FR2364809A2 (fr) 1978-04-14
FR2230540B1 (fr) 1977-02-11

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