GB1119153A - Improvements in method and apparatus for drag reduction on water vehicles - Google Patents

Improvements in method and apparatus for drag reduction on water vehicles

Info

Publication number
GB1119153A
GB1119153A GB51464/67A GB5146467A GB1119153A GB 1119153 A GB1119153 A GB 1119153A GB 51464/67 A GB51464/67 A GB 51464/67A GB 5146467 A GB5146467 A GB 5146467A GB 1119153 A GB1119153 A GB 1119153A
Authority
GB
United Kingdom
Prior art keywords
vehicle
water
additive
entrapping
angle
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
Application number
GB51464/67A
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.)
General Electric Co
Original Assignee
General Electric Co
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 claimed from US451933A external-priority patent/US3303811A/en
Priority claimed from US451763A external-priority patent/US3303810A/en
Application filed by General Electric Co filed Critical General Electric Co
Publication of GB1119153A publication Critical patent/GB1119153A/en
Expired 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)
  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Vehicle Cleaning, Maintenance, Repair, Refitting, And Outriggers (AREA)
  • Traffic Control Systems (AREA)
  • Other Liquid Machine Or Engine Such As Wave Power Use (AREA)

Abstract

1,119,153. Reducing drag on water vehicles. GENERAL ELECTRIC CO. 21 March, 1966 [29 April, 1965 (2)], No. 51464/67. Divided out of 1,119,152. Heading B7M. The frictional drag on a water vehicle 51 is reduced by adding a water soluble viscoelastic polymer (at 53 from a source 60) to form a laminar flow stream of additive and water in proximity with the surface 52 of the vehicle in the general direction of the flow stream, entrapping a substantial portion of the additive (at 55) after it has flowed over the surface of the vehicle and (via conveying means 56, pump 58 and tube 64 leading to source 60) recirculating the entrapped additive again. Means 65 are provided for sensing the angle of attack of the vehicle and adjusting the entrapping means in accordance with said angle.
GB51464/67A 1965-04-29 1966-03-21 Improvements in method and apparatus for drag reduction on water vehicles Expired GB1119153A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US451933A US3303811A (en) 1965-04-29 1965-04-29 Method and apparatus for drag reduction
US451763A US3303810A (en) 1965-04-29 1965-04-29 Additive drag reduction with recirculation

Publications (1)

Publication Number Publication Date
GB1119153A true GB1119153A (en) 1968-07-10

Family

ID=27036511

Family Applications (2)

Application Number Title Priority Date Filing Date
GB12283/66A Expired GB1119152A (en) 1965-04-29 1966-03-21 Method and apparatus for drag reduction on water-borne vehicles
GB51464/67A Expired GB1119153A (en) 1965-04-29 1966-03-21 Improvements in method and apparatus for drag reduction on water vehicles

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB12283/66A Expired GB1119152A (en) 1965-04-29 1966-03-21 Method and apparatus for drag reduction on water-borne vehicles

Country Status (3)

Country Link
CH (2) CH466740A (en)
DE (1) DE1781369A1 (en)
GB (2) GB1119152A (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2251468B3 (en) * 1972-10-20 2008-02-28 Licentia Patent-Verwaltungs-Gmbh Water vehicle e.g. ship, drive efficiency improving method, involves reducing frictional resistance of rotary drive propeller by adding water-soluble, flowable, strong polar and linear polymer of high molecular weight in boundary layer
GB2225754A (en) * 1988-12-08 1990-06-13 Plessey Co Plc Marine body exhibiting low fluid friction
US6357374B1 (en) * 2000-07-21 2002-03-19 Cortana Corporation Method and apparatus for increasing the effectiveness and efficiency of multiple boundary layer control techniques
CN112478043B (en) * 2020-11-19 2021-08-31 江苏科技大学 An angle-adjustable drag reduction device based on the body thorns of pufferfish
CN115649399B (en) * 2022-11-21 2023-08-29 中国船舶科学研究中心 Preparation method of underwater vehicle using hydrogel to delay boundary layer transition
CN116853410B (en) * 2023-08-09 2024-05-14 中国船舶科学研究中心 Synergistic drag reduction method for reducing resistance of underwater vehicle

Also Published As

Publication number Publication date
CH466740A (en) 1968-12-15
CH452376A (en) 1968-05-31
GB1119152A (en) 1968-07-10
DE1781369A1 (en) 1970-12-03

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