RU2705510C1 - Forward hydrofoil device - Google Patents

Abstract

FIELD: shipbuilding.

SUBSTANCE: invention relates to shipbuilding, namely, to forward hydrofoil device for hydrofoils. Device comprises starting foil (1) of V-shape, located under starting foil running foil (2) of V-shape, comprising side parts (6) and central part (5), having greater angle of deadrise relative to lateral parts, and fastening posts (3, 4) for connection of starting foil (1) and running foil (2) to ship hull (8). Starting foil (1) and running foil (2) have segment profile in cross section with displacement of maximum thickness towards front edge of foil. Fasteners (3, 4) include one central post (3) and two side posts (4), each of which connects starting foil (1) and running foil (2) to form a single frame, which also comprises two additional posts (7) connecting running foil (2) at transition points of central part (5) and side parts (6) with starting foil (1). Side parts (6) of running foil (2) have alternating chord increasing in direction to periphery of running foil (2).

EFFECT: technical result consists in reduction of hydrodynamic resistance of forward foil device with simultaneous increase of ship stability in transverse direction, as well as increase of rigidity and strength of forward foil device.

4 cl, 7 dwg

Description

Technical field

The invention relates to the field of shipbuilding, namely to a nasal wing device for hydrofoil vessels, or a nasal hydrofoil.

State of the art

The closest analogue of the claimed invention is a wing device disclosed in the USSR copyright certificate SU182544, 05.25.1966. The design includes a launch wing, a navigation wing located underneath it, and four mounting posts for individually attaching the wings to the hull. The starting and running wings are V-shaped and have a segmented (plano-convex) profile in cross section with the greatest thickness shifted to the bow of the vessel. In this case, the wing is characterized by variable pitching, in which the central part of the wing has a larger pitching angle with respect to the lateral parts.

A disadvantage of the known design is the relatively low stiffness and high hydrodynamic resistance of the wing device.

Disclosure of the invention

The objective of the claimed invention is to eliminate the disadvantages of analogues, and the development of a more effective from a hydrodynamic point of view of the design of the nose wing device, or the nose hydrofoil, hydrofoil vessel.

The technical result of the invention is to reduce the hydrodynamic resistance of the bow wing device while increasing the stability of the vessel in the transverse direction, as well as increasing the rigidity and strength of the bow wing device.

The problem is solved, and the technical result is achieved in the present invention due to the fact that the nose wing device comprises a V-shaped launch wing, a V-shaped navigation wing located under it and mounting racks for connecting the starting wing and navigation wing with the hull of the vessel . The wing includes side parts and a central part having a larger pitching angle with respect to the side parts. The starting wing and the running wing have a cross-sectional profile in cross section with an offset of the greatest thickness towards the leading edge of the corresponding wing. Fixing racks include one central and two side racks, each of which connects the starting and running wings with the formation of a single frame, which also contains two additional racks connecting the running wing at the places of its transition of the central part and side parts with the starting wing. In this case, the lateral parts of the airfoil have a variable chord, increasing towards the periphery of the airfoil.

In addition, the task is solved, and the specified technical result is achieved in particular embodiments of the invention, according to which the launch wing has a larger angle of attack than the navigation wing; the central and side mounting posts have a trapezoidal upper part and a parallelogram-shaped lower part; additional racks are made in the form of a parallelogram.

The use of the described frame structure of the nose wing device with a central strut and additional struts in combination with the geometry of the wings allows to significantly (about two times) increase the stiffness and strength of the wing in its center, where the fracture is located. In turn, this makes it possible to use wing profiles in the area of increased keeving, which have significantly lower (about two times) the height and chord of the wing. The use of such profiles in comparison with similar known wings can significantly reduce the overall hydrodynamic resistance of the nose wing device at high speeds while increasing the stability of the vessel in the transverse direction, because a significant part of the portion of the wing with increased deadrise continues to remain submerged at high speeds.

Brief Description of the Drawings

Further, the invention is illustrated by drawings, where:

in FIG. 1 shows a front view of the claimed nose wing device;

in FIG. 2 shows a side view of the claimed nose wing device;

in FIG. 3 shows a section of the claimed nasal wing device;

in FIG. 4 shows a model of a vessel with the claimed bow wing device, front view;

in FIG. 5 shows a model of a vessel with the claimed bow wing device, side view,

in FIG. 6 shows a model of the vessel with the declared bow wing device, rear view at an angle,

in FIG. 7 shows a model of a vessel with the claimed bow wing device, bottom view.

The structural elements are indicated in the figures by the following positions:

1 - starting wing;

2 - running (marching) wing;

3 - fixing central rack;

4 - mounting side stand;

5 - the central part of the running wing;

6 - peripheral part of the running wing;

7 - an additional rack;

8 - ship hull.

The implementation of the invention

The nasal wing device (or nasal underwater wing) is designed to lift the bow of the vessel above the surface of the water in the running mode, thereby achieving a reduction in the wetted surface and, accordingly, a decrease in the resistance of the hull.

The device comprises a starting hydrofoil 1, a running (marching) hydrofoil 2 and five struts 3, 4, 7 connecting these wings 1, 2 with the formation of a single frame structure.

The starting wing 1 has a V-shape with a segmented (convex) profile in the cross section and is characterized by a shift of the largest thickness of the profile to the leading edge of the starting wing, i.e. to the bow of the vessel (see section in Fig. 3). In addition, the starting wing 1 is characterized by an increased angle of attack compared to the angle of attack of the wing 2.

The wing (marching) wing 2 is located under the launch wing 1 and has the shape of a “gull”, or V-shaped, with variable pitching, so that the central part 5 of the wing 2 has a greater pitch angle with respect to the side parts 6 of the wing 2.

The central part 5 and the side parts 6 of the wing 2 in cross section also have a segmented, plano-convex profile with an offset of the greatest thickness towards the front edge of the wing 2, i.e. to the bow of the ship. In this case, the side parts 6 of the airfoil 2 have a variable profile chord, which increases towards the periphery of the airfoil 2, because to the side of the ship (see Fig. 2, 7).

Fixing racks 3, 4 include one central rack 3 and two side racks 4, which connect the launch wing and the running wing 2 and ensure their fastening to the hull 8 of the vessel. At the same time, at the junction of the side parts 6 to the central part 5 of the navigation wing (2), two additional posts 7 are provided that connect the launch wing 1 and the navigation wing 2 without being attached to the hull 8 of the vessel.

Fixing racks 3, 4 and additional racks 7 are essentially vertical orientation and parallel to the direction of movement of the vessel. The mounting posts 3, 4 have a trapezoidal upper part and a parallelogram-shaped lower part. Additional racks 7 are made in the form of a parallelogram.

When the device is in operation, when the vessel begins to move, the starting wing 1 creates a lifting force for pushing the vessel. When moving, the wing 2 helps the vessel to stay on the surface of the water, reducing drag.

Claims (10)

1. Nasal wing device containing: launch wing (1) V-shaped, a V-shaped running wing (2) located under the starting wing, including side parts (6) and a central part (5) having a greater pitching angle with respect to the side parts (6), wherein the starting wing (1) and the running wing ( 2) have a cross-sectional segment profile with an offset of the greatest thickness towards the front edge of the corresponding wing, and fastening posts (3, 4) for connecting the launch wing (1) and the navigation wing (2) with the hull of the vessel (8), characterized in that the said mounting posts (3, 4) include one central post (3) and two side posts (4), each of which connects the start wing (1) and the travel wing (2) to form a single frame, moreover, this frame also contains two additional posts (7) connecting the wing (2) at the transition points of the Central part (5) and side parts (6) with the start wing (1), and the lateral parts (6) of the wing (2) have a variable chord, increasing towards the periphery of the wing (2). 2. The device according to claim 1, characterized in that the launch wing (1) has a larger angle of attack than the travel wing (2). 3. The device according to claim 1, characterized in that the central mounting post (3) and side mounting posts (4) have a trapezoidal upper part and a parallelogram-shaped lower part. 4. The device according to claim 1, characterized in that the additional racks (7) are made in the form of a parallelogram.

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