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WO1998038078A1 - Coque de bateau - Google Patents

Coque de bateau Download PDF

Info

Publication number
WO1998038078A1
WO1998038078A1 PCT/SE1998/000338 SE9800338W WO9838078A1 WO 1998038078 A1 WO1998038078 A1 WO 1998038078A1 SE 9800338 W SE9800338 W SE 9800338W WO 9838078 A1 WO9838078 A1 WO 9838078A1
Authority
WO
WIPO (PCT)
Prior art keywords
boat hull
uninterrupted
shaped
web
smooth
Prior art date
Application number
PCT/SE1998/000338
Other languages
English (en)
Inventor
Ocke Mannerfelt
Original Assignee
Ab Volvo Penta
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 Ab Volvo Penta filed Critical Ab Volvo Penta
Publication of WO1998038078A1 publication Critical patent/WO1998038078A1/fr

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
    • B63B1/02—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving lift mainly from water displacement
    • B63B1/04—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving lift mainly from water displacement with single hull
    • B63B1/042—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving lift mainly from water displacement with single hull the underpart of which being partly provided with channels or the like, e.g. catamaran shaped
    • 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
    • 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 a boat hull with hull sides which, via sharp edges, join a V-shaped bottom which has on the one hand longitudinal web strips and on the other hand at least one transverse web which extends from the respective edge in the direction of the centre line of the bottom so as to guide air in under the bottom when the boat is travelling at planing speed.
  • transverse webs extend transversely across the entire boat bottom from one edge to the other, which causes air to be distributed over the entire bottom surface aft of the web so that maximum reduction of friction against the water is achieved.
  • the object of the present invention is in general to produce a boat bottom configuration of the type indicated in the introduction, which prevents air being introduced under specific bottom surfaces, so that these slide in at least virtually air-bubble-free water when the boat is travelling at planing speed.
  • the object of the invention is to produce a boat hull designed with transverse webs, which can utilize a water- jet unit as a power unit.
  • transverse web is divided into at least two parts which are separated by an at least in the main smooth bottom portion which is uninterrupted in the longitudinal direction and begins in front of the web and extends as far as the stern of the hull.
  • FIG. 1 shows a side view of a first embodiment of a boat hull according to the invention
  • Fig. 2 shows a perspective view at an angle from below of the hull in Fig. 1,
  • Fig. 3 shows a diagrammatic cross-section through the hull in Figs 1 and 2
  • Fig. 4 shows a side view of a second embodiment of a hull according to the invention
  • Fig. 5 shows a perspective view at an angle from below of the hull in Fig. 4
  • Fig. 6 shows a diagrammatic cross-section through the hull in Figs 4 and 5.
  • 1 designates generally a bottom part of a hull which, via sharp transitions/edges 2, joins the hull side 3.
  • the hull has a straight stern 4 and a V-shaped forebody 5 - seen in horizontal projection.
  • the bottom part 1 is designed with a first transverse web 7 which has an edge surface 9 directed in the main at right angles to the bottom surface.
  • the web 7 consists of two parts 7a and 7b which extend inwards from the edges 2 to a plane and smooth bottom portion 10 which is V-shaped and extends from a point 11 in front of the web 7 to the stern 4.
  • the bottom part 1 is designed with a second transverse web 12 consisting of two parts 12a, 12b of the same design as the first transverse web.
  • the bottom surfaces between the first and the second transverse webs and between the second transverse web and the stern form inclined bottom surface portions 13, 14.
  • the transverse webs 7, 12 are directed forwards at an angle so that, when the boat is travelling at planing speed, they guide air in under the bottom part 1.
  • the hull is designed with conventional longitudinal web strips 15 in order to increase the lift. As can be seen from the figures, the hull has a greater number of web strips 15 in front of the front transverse web 7 than between the webs 7 and 12 and a smaller number of web scrips 15 behind than between the webs. In this way, lift is achieved that gives an optimum travelling position of the hull with an angle of attack of 3° to 4°.
  • the bottom portion 10 joins the laterally located bottom surface portions 13, 14 via sharp edges 13a and 14a, which results in air that is guided in under the bottom via the webs 7, 12 being prevented from being guided in under the bottom portion 10.
  • the. transition between the bottom portion 10 and the laterally located surface portions 13, 14 can be designed with recesses.
  • Such a recess 16 is shown by a dot-and-dash line. Fins can be arranged as a complement or an alternative to recesses 16.
  • a fin 17 is shown by a dot-and-dash line.
  • Figs 1-3 The hull shown in Figs 1-3 is designed for a water-jet unit (not shown) and has an opening 18, to which the suction line of the water-jet unit is intended to be connected.
  • Figs 4-6 another embodiment of a boat hull according to the invention is shown, which is intended for a twin water-jet unit.
  • Features that correspond to features in Figs 1-3 have been given the same reference numbers as in Figs 1-3.
  • the basic difference between the hull in Figs 1-3 and the hull in Figs 4-6 is that the plane horizontal bottom surface portion 10 between the transverse web halves 7a, 7b of the former is replaced by a smooth portion 20 which is V-shaped in a transverse vertical plane and constitutes a direct extension of the bottom portion in front of the front transverse web 7.
  • the bottom portion 20 is divided into two parts 20a, 20b by a V- shaped recess 21 which extends aft to the stern 4.
  • openings 22 In the aft portions of the bottom parts 20a, 20b are openings 22, to which the suction lines of two water-jet units (not shown) are intended to be connected. So as to reduce friction in the recess 21, air can be guided in via an opening 23 which opens into a duct 24 with an air intake 25 located at a level above the waterline of the hull.

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)
  • Metal Rolling (AREA)
  • Artificial Fish Reefs (AREA)
  • Joining Of Corner Units Of Frames Or Wings (AREA)
  • Other Liquid Machine Or Engine Such As Wave Power Use (AREA)

Abstract

L'invention concerne une coque de bateau comprenant des côtés (3) prolongés, par l'intermédiaire d'angles vifs, par un fond en forme de V. Ce fond présente, d'une part, des nervures (15) longitudinales et, d'autre part, des nervures transversales (7, 12), divisées en deux parties (7a, 7b et 12a, 12b), qui s'étendent du bord (2) respectif jusqu'à une partie centrale (10) du fond, cette partie étant lisse et continue sur la longueur du fond.
PCT/SE1998/000338 1997-02-26 1998-02-25 Coque de bateau WO1998038078A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9700691-0 1997-02-26
SE9700691A SE9700691L (sv) 1997-02-26 1997-02-26 Båtskrov

Publications (1)

Publication Number Publication Date
WO1998038078A1 true WO1998038078A1 (fr) 1998-09-03

Family

ID=20405943

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1998/000338 WO1998038078A1 (fr) 1997-02-26 1998-02-25 Coque de bateau

Country Status (2)

Country Link
SE (1) SE9700691L (fr)
WO (1) WO1998038078A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2531096A1 (es) * 2013-09-09 2015-03-10 PUIGNAU JOSEP Mª QUER Proa de estructura atomizadora para embarcaciones
US9162732B2 (en) 2013-10-29 2015-10-20 Ram Investments of South Florida Inc. Stepped hull

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3974790A (en) * 1974-01-23 1976-08-17 Bo Julius Oldenburg Bottom for planing boats
US4004542A (en) * 1973-03-16 1977-01-25 Holmes William H Waterjet propelled planing hull
US4233920A (en) * 1979-05-24 1980-11-18 Wood Manufacturing Company Vee hull construction
EP0184858A2 (fr) * 1984-12-13 1986-06-18 Eero Harilainen Structure du fond d'un bateau
EP0218260A2 (fr) * 1985-10-11 1987-04-15 Dealermain Ltd. Bateau à grande vitesse
GB2226532A (en) * 1987-06-16 1990-07-04 Haines John S Motor boat hulls

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4004542A (en) * 1973-03-16 1977-01-25 Holmes William H Waterjet propelled planing hull
US3974790A (en) * 1974-01-23 1976-08-17 Bo Julius Oldenburg Bottom for planing boats
US4233920A (en) * 1979-05-24 1980-11-18 Wood Manufacturing Company Vee hull construction
EP0184858A2 (fr) * 1984-12-13 1986-06-18 Eero Harilainen Structure du fond d'un bateau
EP0218260A2 (fr) * 1985-10-11 1987-04-15 Dealermain Ltd. Bateau à grande vitesse
GB2226532A (en) * 1987-06-16 1990-07-04 Haines John S Motor boat hulls

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2531096A1 (es) * 2013-09-09 2015-03-10 PUIGNAU JOSEP Mª QUER Proa de estructura atomizadora para embarcaciones
US9162732B2 (en) 2013-10-29 2015-10-20 Ram Investments of South Florida Inc. Stepped hull

Also Published As

Publication number Publication date
SE9700691L (sv) 1998-08-27
SE9700691D0 (sv) 1997-02-26

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