WO2021238357A1 - Dispositif d'enveloppement pliable pour système de réduction de traînée de couche d'air de navire, et navire de réduction de traînée de couche d'air - Google Patents

Dispositif d'enveloppement pliable pour système de réduction de traînée de couche d'air de navire, et navire de réduction de traînée de couche d'air Download PDF

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Publication number
WO2021238357A1
WO2021238357A1 PCT/CN2021/081525 CN2021081525W WO2021238357A1 WO 2021238357 A1 WO2021238357 A1 WO 2021238357A1 CN 2021081525 W CN2021081525 W CN 2021081525W WO 2021238357 A1 WO2021238357 A1 WO 2021238357A1
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WIPO (PCT)
Prior art keywords
ship
coaming
flat bottom
drag reduction
air
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PCT/CN2021/081525
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English (en)
Chinese (zh)
Inventor
陈雷强
吴赞
高丽瑾
朱玉柱
陈少峰
恽秋琴
Original Assignee
中船重工（上海）节能技术发展有限公司
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Publication of WO2021238357A1 publication Critical patent/WO2021238357A1/fr

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    • 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

Definitions

  • the present disclosure belongs to the technical field of a gas layer drag reduction system at the bottom of a ship, and in particular relates to a foldable containment device used for the gas layer drag reduction system of a ship and a gas layer drag reduction ship.
  • Ship air layer drag reduction is a technology that reduces the frictional resistance of the sailing hull by forming an air layer covering the bottom of the ship by jetting air to the bottom of the ship to reduce the wet surface area of the hull.
  • Longitudinal coaming is more acceptable due to the small changes to the hull, but it has an impact on the ship's draft (when navigating in shallow water channels), and the additional resistance of the hull after the longitudinal coaming is installed on the bottom of the ship will increase when the ship is not jetted.
  • the containment device of the ship's air layer drag reduction system generally adopts the form of up and down telescoping, and the entire longitudinal baffle and partition are retracted into the hull.
  • the installation of this device will greatly transform the bottom of the ship and cannot be adjusted.
  • the purpose of the present disclosure is to provide a foldable containment device and a gas layer drag reduction ship used in a ship's gas layer drag reduction system, so as to solve the problem that the containment device in the gas layer drag reduction system of the prior art has a relatively large modification to the bottom of the ship during installation. Big problem.
  • a collapsible containment device for a ship's air layer drag reduction system which is installed on the flat bottom of an air layer drag reduction ship, above the flat bottom of the ship is a bottom tank, and includes:
  • each of the air pockets is rotatably connected to the lower surface of the ship's flat bottom, and after each of the air pockets is rotated and unfolded, they are matched to form an enclosure for accommodating the air layer drag reduction ship Air pockets in the air layer;
  • each of the air pocket panels is respectively equipped with one or more of the driving structures
  • the driving structure includes a driving part and a transmission part, the driving part is arranged in the bottom cabin, the One end of the transmission part is connected to the driving part, and the other end passes through the ship flat bottom and is connected to the air pocket coaming, and a sealing structure is provided between the transmission part and the ship flat bottom; the driving part passes through the The transmission member drives the air pocket panel to rotate relative to the flat bottom of the ship, so as to realize the unfolding or folding of the air pocket panel.
  • the transmission member is an arc-shaped transmission member, and a plurality of arc-shaped transmission members are provided on the flat bottom of the ship.
  • One end of the arc-shaped transmission member is connected to the drive member, and the other end passes through the first through hole to be connected to the air pocket enclosure.
  • the arc-shaped transmission member and the first The sealing structure is arranged between the through holes;
  • the arc-shaped transmission member slides up and down in the first through hole to drive the air pocket coaming plate to rotate with respect to the ship flat bottom.
  • the arc-shaped transmission member is an arc-shaped strut.
  • the sealing structure is a watertight box connected to the upper surface of the ship's flat bottom in a watertight manner, and a second passage is provided on the watertight box.
  • the arc-shaped transmission member penetrates the second through hole and is connected to the second through hole in a watertight sliding manner.
  • the driving member is a hydraulic device
  • the fixed end of the hydraulic device is connected to the upper surface of the ship flat bottom
  • the The output end of the hydraulic equipment is connected with the arc-shaped transmission member, and drives the arc-shaped transmission member to slide up and down in the first through hole.
  • the hydraulic equipment is a hydraulic rod
  • the hydraulic rod is arranged in the bottom tank, and the output end of the hydraulic rod is connected to The arc-shaped transmission member is connected.
  • the foldable enclosure device for the air layer drag reduction system of a ship provided by the present disclosure, the air pocket enclosure includes:
  • Two side coamings are respectively arranged on the port and starboard parts of the flat bottom of the ship along the length of the ship;
  • the bow coaming is arranged on the bow part of the flat bottom of the ship along the width of the ship;
  • the stern coaming is arranged on the stern part of the flat bottom of the ship along the width of the ship;
  • the two side coamings, the bow coaming and the stern coaming are all rotatably connected with the lower surface of the ship's flat bottom, and after rotating and unfolding, they cooperate with each other to form the air-layer drag reduction ship Air pockets in the air layer;
  • the two side coamings, the bow coaming and the stern coaming are respectively equipped with one or more driving structures for driving them to rotate.
  • the bow coaming and the stern coaming both have a first side connected to the ship flat bottom and a contact point.
  • the second side opposite to the first side;
  • a bow flexible member is provided on the stern side of the bow coaming, and the bow flexible member is connected to the flat bottom of the ship and the second side of the bow coaming respectively.
  • the bow flexible member, The bow coaming and the flat bottom of the ship cooperate to form a first triangular structure;
  • a stern flexible member is provided on the stern side of the stern coaming, and the stern flexible member is connected to the ship flat bottom and the second side of the stern coaming respectively, and the stern flexible member, The stern coaming and the flat bottom of the ship cooperate to form a second triangular structure.
  • the air pocket panel is hingedly connected to the ship flat bottom.
  • a solid sealing strip is provided on the rotating outer side of the connection between the ship side coaming and the ship flat bottom.
  • the vertical distance between the lowermost end of the side coaming of the ship and the flat bottom of the ship when unfolded is 100 mm to 800 mm. between.
  • each of the air pocket enclosures respectively includes a plurality of enclosure panels arranged end to end in a line, and the enclosure panels
  • the sub-boards are respectively rotatably connected with the lower surface of the flat bottom of the ship; each of the coaming sub-boards is respectively equipped with the driving structure.
  • the foldable containment device for the air layer drag reduction system of a ship provided by the present disclosure further includes a plurality of cavitation partitions, and each of the cavitation partitions is respectively connected to the flat bottom of the ship in the direction of the ship's length.
  • the lower surface, and the cavitation partitions are all located in the cavities; each of the cavitation partitions is respectively equipped with one or more of the driving structures.
  • An air-layer drag reduction ship provided with the foldable containment device for the ship's air-layer drag reduction system as described in any one of the above
  • the flat bottom of the ship needs to be cut only in the place where the transmission part passes through, which is compared with all the air traps in the prior art. Where the cave coaming plates are connected, the flat bottom of the ship needs to be cut and processed.
  • the present disclosure makes small modifications to the bottom of the ship, so it solves the problem of large modifications to the bottom of the ship when the baffle device of the gas layer drag reduction system in the prior art is installed. .
  • the air-layer drag reduction ship equipped with the present disclosure can rotate the air-cavity coaming and the air-cavity baffle to fit the flat bottom of the ship when navigating in the shallow water channel, so as to maintain the draft of the original ship and avoid the air-cavity coaming and air-cavity.
  • the clapboard has an angle with the flat bottom of the ship, which increases the draught and affects normal navigation.
  • the foldable containment device provided by the present disclosure can adjust the bow coaming and the bow coaming in the vertical direction through the driving structure when the air-jet equipment is in the air when the air-jet device is jetting.
  • the distance between the lowest point of the stern coaming and the flat bottom of the ship increases the stability of the bottom air layer of the ship.
  • the cavitation panel and the air cavity partition can be rotated to fit the flat bottom of the ship, reducing the foldable enclosure.
  • the additional resistance caused by the blocking device at the bottom of the ship enhances the drag reduction and energy saving effects.
  • the rotation of the air-cavity enclosure and the air-cavity partition can reduce the adhesion of marine organisms on the air-cavity enclosure and the air-cavity partition.
  • the fixed sealing strip can be arranged to support and fix the air pocket and prevent the leakage of gas in the air pocket when the air pocket enclosure is unfolded.
  • the watertight box is fixed on the upper surface of the flat bottom of the ship, and the second through hole on the watertight box is watertight when connected to the arc-shaped struts in a sliding manner, so that the arc-shaped struts pass through the flat bottom of the ship.
  • the watertight box is an impervious structure, which can prevent the water outside the ship from entering the inside of the hull.
  • the first through hole on the flat bottom of the ship and the second through hole on the watertight box uniquely determine the sliding path of the arc support rod, and the first through hole and the second through hole can support and fix the arc support rod.
  • Fig. 1 is a schematic top view of a foldable containment device used in a ship's air layer drag reduction system of the present disclosure
  • Figure 2 is a schematic side view of the foldable containment device used in the ship's air layer drag reduction system of the present disclosure
  • Fig. 3 is a structural schematic diagram of the open state of the ship side coaming of the present disclosure
  • Figure 4 is a schematic structural diagram of the disclosed ship side coaming in a folded state
  • Fig. 5 is a structural schematic diagram of the open state of the bow coaming of the present disclosure
  • Fig. 6 is a schematic structural diagram of the bow panel of the present disclosure in a folded state
  • Fig. 7 is a structural schematic diagram of the open state of the stern coaming of the present disclosure.
  • Fig. 8 is a schematic structural diagram of the stern coaming panel of the present disclosure in a folded state.
  • this embodiment provides a foldable containment device for the gas layer drag reduction system of a ship, which is installed on the flat bottom 2 of the gas layer drag reduction ship, and the bottom tank is above the flat bottom 2 of the ship.
  • the foldable containment device used for the ship's air layer drag reduction system includes a plurality of air pocket panels and a plurality of driving structures.
  • Each cavitation coaming plate is rotatably connected to the lower surface of the ship's flat bottom 2. After each cavitation coaming plate is rotated and unfolded, it cooperates to form an air pocket for accommodating the air layer of the air layer drag reduction ship.
  • Each air pocket panel is equipped with one or more driving structures.
  • the driving structure includes a driving part and a transmission part.
  • the driving part is arranged in the bottom cabin. One end of the transmission part is connected to the driving part, and the other end passes through the ship flat bottom 2 and the air cavity.
  • the coaming is connected, and a sealing structure is provided between the transmission part and the flat bottom 2 of the ship; the driving part drives the air cavity coaming to rotate relative to the flat bottom 2 of the ship through the transmission part to realize the unfolding or folding of the air cavity coaming.
  • the foldable containment device used in the air layer drag reduction system of a ship provided by the present disclosure only needs to cut the ship flat bottom 2 where there is a transmission member passing through.
  • the longitudinal baffle and the longitudinal baffle are all moved up and down relative to the bottom of the ship to retract into the hull 1 or extend out of the bottom of the ship, all the places connected to the longitudinal baffle and the longitudinal baffle are required.
  • the ship flat bottom 2 is cut and processed. In terms of intersection, this embodiment has less modification to the ship bottom.
  • the cavitation coaming includes two side coamings 3, a bow coaming 4, and a stern coaming 5.
  • Two side coamings 3 are respectively arranged on the port and starboard parts of the flat bottom 2 along the length of the ship.
  • the bow coaming 4 is arranged on the bow of the flat bottom 2 along the width of the ship.
  • the stern coaming 5 is along the width of the ship. The direction is arranged at the stern part of the flat bottom 2 of the ship.
  • the two side coamings 3 are arranged symmetrically with respect to the midline plane of the gas layer drag reduction vessel.
  • the two side coamings 3, the bow coaming 4 and the stern coaming 5 are all rotatably connected with the flat bottom 2 of the ship.
  • the two side coamings 3 are folded toward the midline plane of the air layer drag reduction vessel, and the bow coaming 4 and the stern coaming 5 are both folded toward the stern direction of the ship.
  • the two side coamings 3 are perpendicular to the flat bottom 2 of the ship, and the angles between the bow coaming 4 and the stern coaming 5 and the flat bottom 2 in the stern direction of the ship are all acute angles.
  • the angles between the two side coamings 3, the bow coaming 4, the stern coaming 5 and the ship flat bottom 2 can all be adjusted according to the actual situation through the drive structure.
  • the two side coamings 3, the bow coaming 4, and the stern coaming 5 can all be rotated to fit the flat bottom 2 of the ship.
  • the above-mentioned folding method of the coamings has the advantages of simplicity and reliability, small changes to the bottom of the ship, etc.
  • the folding direction of the side coaming 3, the bow coaming 4 and the stern coaming 5 can also be based on specific conditions. Make adjustments, there are no restrictions here.
  • the driving device drives the side coaming 3, the bow coaming 4, and the stern coaming 5 to rotate and unfold through the transmission part; after unfolding, the bow ends of the two side coamings 3 and the bow coaming 4 Fit, one end of the stern is fitted to the stern coaming 5 to form an air pocket that is not easy to leak at the joint.
  • the length of the ship side coaming 3 is designed according to the length of the ship flat bottom 2 so that the air pocket area under the ship flat bottom 2 is as large as possible, and the wet surface area of the relative hull 1 is as small as possible, which reduces the frictional resistance of the hull more.
  • the height of the cavitation coaming is the vertical distance between the bottom end and the flat bottom 2 of the ship in the open state, and is related to factors such as ship width and draught. Generally, the height of the cavitation coaming is 100 mm to 800 mm in the unfolded state. between. Of course, the distance between them may be less than 100 mm or greater than 800 mm under special circumstances according to actual needs. Therefore, under normal circumstances, the length of the side coaming 3 is adjusted according to the length of the flat bottom 2 of the ship, and the height of the side coaming 3 is controlled between 100 mm and 800 mm according to factors such as ship width and draft.
  • the cavitation coaming and the flat bottom 2 of the ship are connected in rotation through a hinge.
  • a solid sealing strip is provided on the outer side of the rotation where the side coaming 3 and the flat bottom 2 of the ship are connected.
  • the outer side of the transmission is: the side coaming divides the space under the ship's flat bottom into two sides according to the side coaming.
  • the first side is the angle between the side coaming and the flat bottom of the ship when the side coaming is unfolded.
  • the angle between the side coaming and the flat bottom of the ship becomes smaller during the folding process; the second side is that the angle between the side coaming and the flat bottom of the ship becomes smaller during the unfolding of the side coaming, and the side of the ship is when the side coaming is folded.
  • the angle between the coaming and the flat bottom of the ship becomes larger; the second side is the rotating outer side of the coaming on the side of the ship.
  • the fixed sealing strip 11 is arranged at the junction of the side coaming 3 and the ship flat bottom 2 and is perpendicular to the ship flat bottom 2 (formed in an L shape, as shown in Fig. 4). When the ship side coaming 3 is in the unfolded state, the fixed sealing strip 11 can support and fix the ship side coaming 3 and prevent the leakage of gas in the air pocket.
  • each cavitation enclosure can be designed in segments, and each segment is also provided with a driving structure for driving its rotation. That is, the cavitation coaming includes a plurality of sequentially arranged coaming sub-boards, which are respectively rotatably connected with the lower surface of the ship flat bottom 2, and each coffering sub-board is respectively equipped with one or more of the driving structures.
  • Each cavitation panel adopts a segmented design to facilitate manufacturing, installation and use.
  • the driving part of the driving structure may be a hydraulic device 14, the transmission part may be an arc-shaped support rod 13, and the sealing structure may be a watertight box 12.
  • the ship flat bottom 2 is provided with a plurality of first through holes corresponding to the arc-shaped support rods 13, and the arc-shaped support rods 13 pass through the corresponding first through holes.
  • the watertight box 12 is correspondingly arranged at the corresponding arc-shaped strut 13 and the first through hole.
  • the watertight box 12 is connected to the upper surface of the ship flat bottom 2 in a watertight manner.
  • the first through hole communicates with the air layer (or water layer) below the ship flat bottom 2 and The internal space of the watertight box 12.
  • the watertight box 12 is provided with a second through hole.
  • One end of the arc-shaped support rod 13 is rotatably connected with the output end of the hydraulic equipment 14, and the other end passes through the second through hole on the watertight box 12 and the corresponding first through hole on the ship flat bottom 2 under the watertight box 12 to extend out of the hull 1. It is fixedly connected with the corresponding cavitation enclosure.
  • the arc-shaped support rod 13 and the second through hole of the watertight box 12 are connected in a watertight sliding manner.
  • the air-cavity coaming plate is pushed and unfolded by the transmission member, so the transmission member needs to bend rods, plates, etc., because the connection position of the air-cavity coaming plate on the ship flat bottom 2 is fixed, and the position of the first through hole on the ship flat bottom 2 is fixed Therefore, it is necessary that the distance between the transmission part and the connection position of the boat flat bottom 2 and the distance from the first through hole to the connection position of the transmission part and the boat flat bottom 2 are equal.
  • the above-mentioned distance is an arc-shaped transmission member with a radius.
  • the arc-shaped transmission member may adopt an arc-shaped support rod 13. In other embodiments, arc-shaped plates and the like can also be used.
  • the watertight box 12 mainly functions to fix the arc-shaped support rod 13 and ensure the watertightness.
  • the second through hole on the watertight box 12 and the arc-shaped support rod 13 are watertight when they are slidably connected, so that when the arc-shaped support rod 13 passes through the first through hole opened on the flat bottom 2 of the ship, water outside the ship cannot pass through the second through hole Into the ship, that is, the watertight box 12 is an impermeable structure, which can prevent water outside the ship from entering the interior of the hull 1.
  • the second through hole on the watertight box 12 and the first through hole on the ship's flat bottom 2 uniquely determine the sliding path of the arc support rod 13, and the first through hole and the second through hole can support and fix the arc support rod. 13.
  • the hydraulic equipment 14 is arranged in the transfer cabin, and the fixed end is connected with the hull 1.
  • the hydraulic equipment 14 is used to drive the arc-shaped support rod 13 to slide up and down in the first through hole, that is, the arc-shaped support rod 13 slides up and down on the watertight box 12 to drive the rotation of the air-cavity enclosure, thereby realizing the deployment and expansion of the air-cavity enclosure. fold.
  • a controller 15 is provided.
  • the controller 15 is electrically connected to the hydraulic equipment 14 through a control circuit, and is used to control the output degree of the hydraulic equipment 14, so as to control the sliding range of the arc strut 13 on the watertight box 12, thereby controlling the air pocket.
  • the rotation angle of the board is provided.
  • the hydraulic equipment 14 may be a hydraulic rod, and the controller 15 is electrically connected to the hydraulic rod through a control line.
  • the fixed end of the hydraulic rod is rotatably connected to the upper surface of the flat bottom 2 of the ship, and the output end is connected to the arc-shaped support rod 13.
  • the sliding amplitude of the arc support rod 13 is controlled to control the rotation angle of the air pocket enclosure.
  • other driving components that can realize the sliding of the arc-shaped strut 13 on the watertight box 12 can also be used. Even if the hydraulic equipment 14 is used, other non-hydraulic cylinder options can also be used.
  • the controller 15 drives the output end of the hydraulic rod to extend through the control circuit, and the arc-shaped strut 13 is retracted into the ship flat bottom 2 through the watertight box 12, and the ship's side coaming 3 is pulled upwards gently. Slowly fold until the side coaming 3 of the ship fits with the flat bottom 2 of the ship and reaches the folded state.
  • the controller 15 drives the output end of the hydraulic lever to extend through the control circuit, and pulls the bow panel 4 and the stern panel 5 to fold upwards slowly until the bow
  • the part coaming 4 and the stern coaming 5 are attached to the flat bottom 2 of the ship.
  • the cavitation enclosure reduces the attachment of marine organisms on its own body by rotating.
  • a bow wedge block 9 and a stern wedge block 10 are provided.
  • Both the bow coaming 4 and the stern coaming 5 have a first side connected to the flat bottom 2 of the ship and a second side corresponding to the first side.
  • a bow flexible member 7 is provided on the stern side of the bow coaming.
  • the bow flexible member 7 is connected to the flat bottom 2 and the second side of the bow coaming 4 respectively.
  • the bow flexible member 7, the bow The coaming 4 and the ship’s flat bottom 2 cooperate to form a first triangular structure, and the first triangular area is the bow wedge block 8; the height of the bow wedge block 9 is the lower end of the bow coaming 4 when it is deployed.
  • the stern side of the stern coaming is provided with a stern flexible member 8 which is connected to the ship flat bottom 2 and the second side of the stern coaming 5 respectively.
  • the stern flexible member 8, the stern coaming 5 and the ship flat bottom 2 Cooperate to form a second triangular structure, the second triangular area is the stern wedge block 10, and the height of the stern wedge block 10 is the distance between the lowermost end of the stern coaming 5 and the flat bottom 2 of the ship in the unfolded state .
  • the height of the bow wedge block 9 and the stern wedge block 10 can be adjusted to reduce the vortex resistance formed behind the bow coaming 4, Enhance the stability of the air layer in the air pocket.
  • the flexible member is also designed in segments together with the corresponding bow panel 4 or the stern panel 5, that is, the bow wedge block 9 and The stern wedge block 10 is designed in sections.
  • both the bow flexible member 7 and the stern flexible member 8 in this embodiment can use rubber rings.
  • the bow flexible member 7 and the stern flexible member 8 can be other flexible members, which are not limited here.
  • a plurality of cavitation partitions 6 are arranged in the cavities, that is, the cavitation coamings are located between the two ship side coamings 3 between.
  • Each cavitation baffle 6 is respectively connected to the lower surface of the ship flat bottom 2 rotatably along the length of the ship, and divides the cavities into a plurality of air cavities.
  • the plurality of cavitation partitions 6 are symmetrical with respect to the center line of the bottom of the ship, and the cavities are equally divided into a plurality of cavities.
  • Each cavitation partition 6 is respectively equipped with one or more driving structures as described in the first embodiment. Specifically, the connection and positional relationship between the cavitation partition 6 and the driving structure and the flat bottom 2 of the ship are the same as the connection and positional relationship between the side coaming 3 and the driving structure and the flat bottom 2 of the ship.
  • the cavitation partition 6 is connected to the follower in the corresponding driving structure.
  • the cavitation partition 6 and the ship flat bottom 2 are also connected by hinges, and a fixed sealing strip 11 is provided on the rotating outer side of the joint to support the fixed cavitation partition 6 and prevent the air cavity from leaking.
  • the cavitation partition 6 rotates to the centerline during the folding process.
  • the cavitation partition 6 is perpendicular to the flat bottom 2 of the ship in the unfolded state.
  • the length of the cavitation partition 6 is related to the position of the bow coaming 4 and the stern coaming 5 (or the bow wedge block 9, the stern wedge block 10).
  • the plate 5 (or the bow wedge block 9) is close, and the stern end of the cavitation partition 6 is close to the stern coaming 5 (or the stern wedge block 10).
  • the number of cavitation partitions 6 is related to the ship’s width, draught, and the ship’s heel angle.
  • the height value of the cavitation partition 6 is the vertical distance between the lower end of the cavitation coaming and the flat bottom 2 of the ship when it is deployed. The height values of the cavitation panels are similar.
  • the cavitation partition 6 can also adopt a segmented design, each segment is correspondingly provided with a driving structure for driving its rotation, and the segmented junction surface of the cavitation partition 6 adopts an air-leakage design.
  • a gas layer drag reduction ship is equipped with a ship gas layer drag reduction system. Any one or more of 2, 3, a collapsible containment device used in a ship's air layer drag reduction system.
  • the foldable containment device used in the ship's air layer drag reduction system can realize the rotation of the containment structure, that is, the air pocket panel and the air pocket partition 6 relative to the ship flat bottom 2.
  • the air-layer drag reduction ship provided by this embodiment can rotate the air-cavity coaming and the air-cavity partition 6 to fit the flat bottom 2 of the ship when navigating in a shallow water channel, thereby maintaining the draft of the original ship and avoiding the air-cavity coaming.
  • the angle between the cavitation partition 6 and the flat bottom 2 of the ship increases the draught and affects normal navigation.
  • the air layer drag reduction ship can adjust the lowest point of the bow coaming 4 and the stern coaming 5 in the vertical direction at different speeds and different draughts through the drive structure
  • the distance from the flat bottom 2 of the ship increases the stability of the bottom gas layer of the ship.
  • the cavitation coaming plate and the air cavity partition 6 can be rotated to fit the ship flat bottom 2, reducing the foldable enclosure device used for the ship air layer drag reduction system
  • the additional drag caused at the bottom of the ship enhances drag reduction and energy saving effects.

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  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Chemical & Material Sciences (AREA)
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  • Other Liquid Machine Or Engine Such As Wave Power Use (AREA)

Abstract

Dispositif d'enveloppement pliable pour un système de réduction de traînée de couche d'air de navire. Le dispositif d'enveloppement pliable est monté sur une coque de navire plate (2) d'un navire de réduction de traînée de couche d'air, un compartiment de cale de navire étant prévu au-dessus de la coque de navire plate (2), et comprenant de multiples hiloires d'écoutille de poche d'air et de multiples structures d'entraînement. Les hiloires d'écoutille de poche d'air sont reliées de manière rotative à la surface inférieure de la coque de navire plate (2), et, après avoir été dépliées en rotation, les hiloires d'écoutille de poche d'air fonctionnent conjointement pour définir une poche d'air pour recevoir une couche d'air du navire de réduction de traînée de couche d'air. Les hiloires d'écoutille de poches d'air sont chacune pourvues d'une ou de plusieurs structures d'entraînement ; chaque structure d'entraînement comprend un élément d'entraînement et un élément de transmission ; l'élément d'entraînement est disposé dans le compartiment de cale de navire ; l'élément de transmission a une extrémité reliée à l'élément d'entraînement et l'autre extrémité passant à travers la coque de navire plate (2) destinée à être reliée à la hiloire d'écoutille de poche d'air ; une structure d'étanchéité est disposée entre l'élément de transmission et la coque de navire plate (2) ; les éléments d'entraînement entraînent, au moyen des éléments de transmission, les hiloires d'écoutille de poche d'air à tourner par rapport à la coque de navire plate (2), de manière à mettre en œuvre le dépliage ou le pliage des hiloires d'écoutille de poche d'air.
PCT/CN2021/081525 2020-05-28 2021-03-18 Dispositif d'enveloppement pliable pour système de réduction de traînée de couche d'air de navire, et navire de réduction de traînée de couche d'air WO2021238357A1 (fr)

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CN111959675B (zh) * 2020-08-21 2021-05-04 中国船舶科学研究中心 一种船舶顺流喷射气层减阻生成装置
CN113548147B (zh) * 2021-09-02 2022-06-28 中国船舶科学研究中心 一种综合节能效果满足eedi高阶段要求的散货船

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