RU2738488C1 - Method for reduction of hull hydrodynamic resistance and high-speed vessel using this method - Google Patents

Abstract

FIELD: shipbuilding.

SUBSTANCE: invention relates to shipbuilding, namely to high-speed displacement vessels moving on water surface and under water. To create active water flow along longitudinal sides of ship hull by means of ship power plant along ship hull longitudinal recesses of paired, sections of concave section symmetrically arranged relative to ship centerline plane in the form of curve articulated oval surfaces. Active water flow is created by means of side propellers arranged inside paired symmetrically located longitudinal recesses of concave section in front third of ship hull length, wherein active water flow along longitudinal surfaces of ship hull from side screw propellers is swirled in opposite directions relative to ship centerline plane.

EFFECT: higher ship speed.

2 cl, 10 dwg

Description

The invention relates to the field of shipbuilding, namely to high-speed displacement vessels moving on the surface of the water and under water. There is a known method of reducing the hydrodynamic resistance of a ship by ejecting a viscoelastic polymer coating onto the surface of the ship's hull (see RF patent N 2501823, authors Moore K.J. (US), Ryan T.D. (US), Moore K.M. (US) , Boyce TA (US), published 12/20/2013). This technology for reducing the hydrodynamic resistance of the aquatic environment is too laborious and expensive to implement. There is a known method for reducing surface friction when a body moves in water, in which an electric field is created in the boundary layer surrounding the body surface by applying an electric voltage to the conductive sections separated by an insulator, while a boundary gas layer is formed around the surface of the moving body. (see RF patent N 2223195, authors Dozorov T.A., Smirnov G.V., publication 10.02.2004). There is a known method of reducing the resistance when flowing around a body with a flow of a liquid or gaseous medium, which creates a circulation of the medium between the space outside the body and the cavities inside it (see RF patent N 2169097, authors Alpin A.Ya., Alpin V.A., publication 20.06. 2001). It should be noted that all of the above analogs solve the problem of passive reduction of resistance when the body moves in water, which does not give a significant positive effect from the use of these technological solutions. Known technical solutions to increase the throughput of pipelines using devices in the form of swirling planes installed inside the pipelines to swirl the fluid flow through the pipeline (see Austrian patent N134543, publication 25.08.1933, N138296, publication 10.07.1934, author V. Schauberger). Also known is the discovery of N389 from 10/18/1990, (authors Novikov I.I., Skobelkin V.I., Abramovich G.I., Klyachko L.A.). In this coating, a pattern is established for the maximum flow rate of the swirling fluid flow. Based on the above regularities, it is obvious that the hydrodynamic resistance of the pipeline walls decreases when a swirling fluid flow passes through them; therefore, it should be recognized that it is expedient to use an active swirling fluid flow along the ship's hull to reduce the hydrodynamic resistance of the ship's hull. For the prototype, a technical solution was made for a jet propulsion unit, including a water jet power plant, water intake devices, while the exhaust nozzles are located on the areas of the wetted surface of the ship's hull in the form of a two-dimensional array, depending on the hydrodynamic resistance of the ship's hull sections, while the hydrodynamic resistance of the ship's hull is by creating an active water flow along the wetted surface of the ship's hull (RF patent 2651949, author B.N. Sushentsev, published 04.24.2018). The aim of the present invention is to use the effect of an active swirling fluid flow along the surface in contact with water to minimize the hydrodynamic drag of a moving vessel, and as a consequence, increase the speed of the vessel.

This goal is achieved in the proposed method of reducing the hydrodynamic resistance of the ship's hull by creating an active water flow along the longitudinal surfaces of the ship's hull using a ship's power plant, while along the ship's hull, paired longitudinal recesses of a concave section, symmetrically located relative to the diametral plane of the ship, are made in the form of lecally articulated oval surfaces , while the active water flow is created using side propellers located inside the cavity of paired symmetrically located longitudinal recesses of a concave section in the front third of the ship's hull length, while the active water flow along the longitudinal surfaces of the ship's hull from the side propellers is twisted in opposite directions relative to the diametrical plane ship. Also, this goal is achieved in the proposed high-speed vessel including an extended hull, a ship's power plant with a propeller drive, while along the hull of the ship there are paired longitudinal recesses of a concave section symmetrically located relative to the diametrical plane of the vessel in the form of curve-jointed oval surfaces, while an active water flow is created with the help of lateral propellers located inside the cavity of paired symmetrically located longitudinal notches of concave section in the front third of the ship's hull length, while the active water flow along the longitudinal surfaces of the ship's hull from the side propellers is twisted in opposite directions relative to the diametrical plane of the ship. The illustrative examples of the present invention show embodiments of displacement vessels using an active swirling water flow along the surface of the vessel's hull to reduce the hydrodynamic drag of the hull for surface and submarine vessels.

in fig. 1 is a side view of a high-speed large-tonnage displacement surface vessel including an extended hull, a ship's power plant with a propulsion and auxiliary propulsion propellers drive, while the main propulsion propellers are located in the tail of the vessel, while along the ship's hull, paired are made symmetrically located relative to the diametrical plane of the vessel longitudinal grooves of a concave section in the form of curve-jointed oval surfaces, while the active water flow is created by means of the side propellers of the auxiliary propeller located inside the cavity of paired symmetrically located longitudinal grooves of a concave section in the front third of the length of the ship's hull, while the active water flow along the longitudinal surfaces of the hull the vessel from the side propellers is twisted in opposite directions relative to the center plane of the vessel;

in fig. 2 is a side view of a high-speed large-tonnage displacement surface vessel including an extended hull, a ship's power plant with a propulsion propeller drive, while along the ship's hull there are paired symmetrically located longitudinal notches of a concave section in the form of lecally articulated oval surfaces along the hull of the ship. the water flow is created using the side propellers of the main propulsion unit located inside the cavity of paired symmetrically located longitudinal recesses of a concave section in the front third of the length of the ship's hull, while the active water flow along the longitudinal surfaces of the ship's hull from the side propellers is twisted in opposite directions relative to the diametrical plane of the ship;

in fig. 3 - view A1-A1, in Fig. 1 and FIG. 2;

in fig. 4 is a side view of a low-draft high-speed displacement surface vessel including an extended hull, a ship's power plant with a propulsion and auxiliary propulsion propellers drive, while the propulsion propellers are located in the tail of the vessel, while along the ship's hull there are paired symmetrically located relative to the diametrical plane longitudinal grooves of a concave section in the form of curvedly articulated oval surfaces, while an active water flow is created using the side propellers of the auxiliary propulsion device located inside the cavity of paired symmetrically located longitudinal grooves of a concave section in the front third of the length of the ship's hull, while an active water flow along the longitudinal surfaces the hull of the ship from the side propellers is twisted in opposite directions relative to the centreline of the ship;

in fig. 5 is a side view of a low-draft high-speed displacement surface vessel including an extended hull, a ship's power plant with a propulsion propeller drive, while along the ship's hull there are paired longitudinal recesses of a concave section arranged symmetrically relative to the diametrical plane of the vessel in the form of lekally articulated oval surfaces, while active water flow is created using the side propellers of the main propulsion unit located inside the cavity of paired symmetrically located longitudinal recesses of a concave section in the front third of the length of the ship's hull, while the active water flow along the longitudinal surfaces of the ship's hull from the side propellers is twisted in opposite directions relative to the diametral plane of the ship ;

in fig. 6 - view A2-A2, according to FIG. 4 and FIG. 5;

in fig. 7 is a side view of a high-speed diving vessel moving in the surface position, including an extended hull, a ship power plant with a propulsion and auxiliary propulsion propellers drive, while the main propulsion propellers are located in the tail of the vessel, while along the ship's hull, paired are made symmetrically located relative to the diametrical plane of the vessel, longitudinal grooves of a concave section in the form of curved oval surfaces, while an active water flow is created using the side propellers of the auxiliary propeller located inside the cavity of paired symmetrically located longitudinal grooves of a concave section in the front third of the length of the ship's hull, while an active water flow along the longitudinal surfaces of the ship's hull from the side propellers are twisted in opposite directions relative to the diametrical plane of the ship;

in fig. 8 is a view A3-A3 of FIG. 7;

in fig. 9 is a side view of the high-speed diving vessel of FIG. 7 moving underwater

position;

in fig. 10 is a view A4-A4, according to FIG. nine.

In the presented drawings, the numbers indicate:

pos. 1 - hull of a sea surface large-tonnage displacement vessel;

pos. 2 - hull of a surface displacement vessel with shallow draft;

pos. 3 - hull of an underwater or diving vessel;

pos. 4 - a longitudinal recess of a concave section along the hull of the vessel in the form of curve-jointed oval surfaces;

pos. 5 - side propeller screw of the auxiliary propeller located inside the cavity of longitudinal recesses of concave section in the front third of the length of the ship's hull;

pos. 6 - aft propeller of the main propulsion unit;

pos. 7 - side propeller of the main propulsion unit located inside the longitudinal recesses of the concave section in the front third of the length of the ship's hull;

pos. 8 - vertical all-turning rudder in the tail part of the ship's hull;

pos. 9 - area of swirling active water flow along the longitudinal recesses of the concave section of the ship's hull;

pos. 10 - horizontal all-round steering wheel.

pos. 11 - a screw blade installed in the alignment of an active water flow;

Claims (2)

1. A method for reducing the hydrodynamic resistance of a ship's hull, including creating an active water flow along the longitudinal surfaces of the ship's hull using a ship's power plant, characterized in that along the ship's hull, paired longitudinal recesses of a concave section, symmetrically located relative to the diametrical plane of the ship, are made in the form of lecally articulated oval surfaces , while the active water flow is created along the longitudinal grooves of the concave section using side propellers located inside the cavity of the paired symmetrically located longitudinal grooves of the concave section in the front third of the length of the ship's hull, while the active water flow along the longitudinal grooves of the concave section of the ship's hull from the side propellers screws are twisted in opposite directions relative to the centreline plane of the vessel. 2. A ship including an extended hull, a ship power plant with a propeller drive, characterized in that along the hull of the ship, there are paired longitudinal recesses of a concave section, symmetrically located relative to the diametrical plane of the ship, in the form of curved oval surfaces, while an active water flow is created by side propellers located inside the cavity of paired symmetrically located longitudinal concave recesses in the front third of the ship's hull length, while the active water flow along the longitudinal surfaces of the ship's hull from the side propellers twists in opposite directions relative to the diametrical plane of the ship.

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