KR20180063762A - A Vessel - Google Patents

Abstract

According to the present invention, a vessel comprises: a stern portion formed in the rear of a hull; a propeller provided in the stern portion to generate thrust; and a spray unit accelerating the flow of a fluid flowing into the propeller. Moreover, the spray unit is formed in only one of the portside or the starboard of the stern portion.

Description

Ship {A Vessel}

The present invention relates to a ship.

Generally, in the case of a large ship, the propulsion attached to the rear of the hull is advanced by using the flow of the fluid generated when the propeller rotates. At this time, a rudder is attached to the rear of the propeller, and as the rudder rotates to the left and right, the direction of flow of the fluid is changed by changing the direction of flow.

In order to achieve a constant speed through the rotation of the propeller, the engine must be driven using oil such as diesel. In this case, a large amount of oil is consumed and the greenhouse gas is discharged, thereby causing problems such as environmental destruction .

Recently, various efforts have been made to reduce fuel consumption by reducing the energy consumed when propelling the ship. IMO, in particular, discussed ways to reduce greenhouse gas emissions in 2010, and discussions are underway to establish standards and directions for fuel efficiency regulation.

As shipping companies join the movement, shipping companies are beginning to pay attention to fuel-saving vessels that can reduce the burden on fuel costs. Due to the needs of shipping companies, shipbuilders are constantly researching and developing fuel-saving technologies that reduce fuel consumption and reduce greenhouse gas emissions.

As an example of the fuel saving type technology, it is possible to improve the shape of the rear end of a ship, propeller, rudder, etc., or to attach a separate additive, thereby improving the propulsion efficiency and energy saving device (ESD) This energy saving device has already been applied to a large number of ships.

However, these energy saving devices have limited propulsion performance. Therefore, there is a problem that the thrust generation effect by the propulsion device of the ship is not sufficient.

The present invention has been made to improve the conventional art, and it is an object of the present invention to provide a ship which improves the rotation efficiency of the propeller by optimizing the flow of the propeller.

A ship according to the present invention comprises: a stern section formed at the rear of a ship; A propeller provided at the stern section for generating a propulsive force; And a jetting unit for accelerating the flow of the fluid flowing into the propeller, wherein the jetting unit is formed only in one of the port or starboard of the stern.

Specifically, the jetting unit may be formed only between 3 and 4 zones in the aft section among the zones in which the watercourse length of the hull is equally divided into 20 zones.

Specifically, a plurality of the jetting portions may be provided, and the jetting portions may be formed with rows from the upper side to the lower side of the hull.

Specifically, the plurality of jetting units may be formed in a straight line.

Specifically, at least a part of the jetting portion formed below the plurality of jetting portions may be formed to be deflected upward.

Specifically, the ejecting portion formed on the upper side of the plurality of ejecting portions may be formed to be deflected downward.

Specifically, the jetting section can jet air.

Specifically, the jetting unit may be formed at a position lower than the minimum draft of the hull.

Specifically, the jetting section may be formed by engraving the hull at an engraved angle.

Specifically, the jetting unit may have a shape that cuts in a flow direction of a fluid flowing into the propeller through a depressed manner on the hull.

Specifically, the spraying unit may have a scallop shape.

Specifically, the jetting unit may include: a jetting hole through which air is jetted; And a jetting surface having a shape that cuts in a flow direction of the fluid flowing into the propeller from the jetting hole through a depressed manner in the hull.

The ship according to the present invention has an effect that the straightness of the ship is improved and the propulsion efficiency is maximized.

In addition, the ship according to the present invention can be expected to improve the propulsion performance at low cost, and the control for improving the propulsion performance is very simple.

1 is a side view of a ship's stern section according to an embodiment of the present invention.
2 is an enlarged view of the injection part in Fig.
3 is a velocity profile of the propeller inflow of a ship according to an embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The objects, particular advantages and novel features of the present invention will become more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which: FIG. It should be noted that, in the present specification, the reference numerals are added to the constituent elements of the drawings, and the same constituent elements are assigned the same number as much as possible even if they are displayed on different drawings. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a side view of a stern portion of a ship according to an embodiment of the present invention, and FIG. 2 is an enlarged view of a jetting portion in FIG.

1 and 2, a ship 1 according to an embodiment of the present invention includes a ship 10, a rudder 20, a propeller 30, and a jetting section 40. As shown in Fig.

The hull 10 may include an upper portion 101 of the hull 101, a lower portion 102 of the hull 102 and a stern portion 11 and may be provided with a rudder 20, a propeller 30 and a jetting portion 40 have.

The lower portion 102 of the hull 10 indicates the lower portion of the hull 10 and the stern portion 11 is formed on the rear side of the hull 10, Can be expressed as a whole.

However, since the hull 10 included in the embodiment of the present invention is the same as a hull of a general ship 1 (short axis or twin axis), detailed description thereof will be omitted.

The rudder 20 is provided behind the propeller 30 of the stern section 11 and can control the navigation direction of the ship 1. [

The rudder 20 may be configured to be optimized to reduce resistance due to the downstream flow of the propeller 30, and may be configured to optimize the direction in which the rudder upper portion (not shown) and the rudder lower portion (not shown) As shown in FIG.

The propeller (30) is provided on the stern section (11) to generate propulsion force.

Specifically, the propeller 30 is attached to the stern section 11 and can receive rotational force by a drive shaft (not shown) provided on the hull 10. At this time, the rotational force of the drive shaft is transmitted to the shaft of the propeller 30 to which the propeller 30 is fixed, and the shaft of the propeller 30 transmits the rotational force to the propeller 30 to rotate the propeller 30.

The jetting section 40 accelerates the flow of the fluid flowing into the propeller 30 and is formed only in one of the port or starboard of the stern section 11.

Specifically, a plurality of jetting sections 40 may be formed by linearly heating the lower portion 102 of the hull 102 from the upper portion 101 of the hull 10, And may be formed only between 3 and 4 zones in the mid-stern section 11. [

At this time, the jetting section 40 may be formed only on the starboard side of the hull 10 and may be formed at a position lower than the minimum draft of the hull 10, for example.

The jetting section 40 may be formed such that at least a part of the jetting sections 40 formed below the plurality of jetting sections 40 is upwardly deflected, And the yarns 40 may be formed to be deflected downward.

In other words, the jetting portions 40 formed on the upper side can be formed to be deflected to the lower side in the flow direction of the fluid flowing into the propeller 30, and the jetting portions 40 formed on the lower side can be formed to flow into the propeller 30 And may be formed so as to be deflected upward, which is the flow direction of the fluid.

In addition, the jetting section 40 can accelerate the flow of the fluid by jetting air toward the area below the rotational axis of the propeller 30 from the rotating surface of the propeller 30. [

The jetting section 40 may be formed of a jetting hole H and a jetting surface 40a, and may have a scallop shape.

2, the jetting unit 40 includes a jetting hole H for jetting air and a jetting hole H for jetting the jetting air into the propeller 30 through the intaglio system And it may have a spray surface 40a having a shape that cuts in the flow direction of the fluid.

The jetting hole H can jet air through an air injecting device (not shown) provided inside the hull 10 and the jetting surface 10a can be jetted from the jetting hole H to the hull 10 The shape to be scraped by the engraved method may be a scallop shape.

The effects of the ship 1 of the present invention due to the jetting section 40 described above will be described based on Fig.

3 is a velocity profile of the propeller inflow of a ship according to an embodiment of the present invention.

(A) is a velocity distribution diagram of a propeller inflow flow in a ship in which the jetting section 40 of the present invention is not installed, (b) is a velocity distribution diagram of a propeller inflow flow in a ship equipped with the jetting section 40 of the present invention And is a velocity distribution diagram of the propeller inflow in the ship when the jetting section 40 is installed only on the starboard side.

As can be seen from the velocity distribution diagrams of the portions A and B in FIGS. 3A and 3B, the distribution of the red portion in the portion B is wider than that in the portion A. FIG. (The closer to the red the faster the propeller inflow velocity and the closer to the blue the propeller inflow velocity becomes slower)

There is a difference in performance as shown in the following table due to the difference in the speed distribution of the portion A and the portion B shown in FIG.

Transfer horsepower (DHP) Hull efficiency (ETAH) Quasi-propulsion efficiency (ETAD) A ship in which the jetting section 40 is not installed 17,123 1.088 0.675 The ship (40) 16,914 1.133 0.682 efficiency -1.22% 4.14% 1.04%

In other words, in the ship 1 according to the embodiment of the present invention, by installing the jetting section 40 only on one of the left port and the starboard port of the stern, the horsepower of about 1.22% is saved, The efficiency is improved by 1.04% or more.

As described above, the ship 1 according to the present invention has an effect that the straightness of the ship 1 is improved and the propulsion efficiency is maximized, the propulsion performance can be improved at low cost, and the control There is a very simple effect.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the same is by way of illustration and example only and is not to be construed as limiting the present invention. It is obvious that the modification and the modification are possible.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

1: Ships 10: Hull
101: upper part of the ship 102: lower part of the ship
11: stern section 20: rudder
30: Propeller 40:
40a: jet plane H: jet hole

Claims (13)

A stern section formed behind the hull;
A propeller provided at the stern section for generating a propulsive force; And
And a jetting portion for accelerating the flow of the fluid flowing into the propeller,
The injection unit
Wherein the stern section is formed only in one of a port or starboard of the stern section. The apparatus according to claim 1,
Characterized in that the ship is formed only between 3 and 4 zones in the aft section among the zones in which the ship's soy sauce is equally divided into 20 vessels. The apparatus according to claim 1,
Wherein a plurality of the hulls are provided, and the hulls are formed with rows from the upper side to the lower side of the hull. The image forming apparatus according to claim 3,
Wherein the first and second shafts are arranged in a straight line with each other. [6] The apparatus according to claim 4, wherein at least a part of the jetting unit formed below the plurality of jetting units comprises:
And is formed to be deflected upward. [5] The apparatus according to claim 4, wherein the jetting unit formed on the upper side of the plurality of jetting units comprises:
And is deflected downward. The apparatus according to claim 1,
Characterized in that the air is jetted. The apparatus according to claim 1,
Wherein the hull is formed at a position lower than the minimum draft of the hull. The apparatus according to claim 1,
Wherein the hull is formed by engraving engraving on the hull. 10. The image forming apparatus according to claim 9,
Wherein the hull is shaped in a direction of flow of the fluid flowing into the propeller through a depressed manner in the hull. 11. The apparatus according to claim 10,
Characterized in that it has a scallop shape. 10. The image forming apparatus according to claim 9,
An injection hole through which air is injected; And
And a jetting surface having a shape that cuts in a flow direction of the fluid flowing into the propeller from the jetting hole through a depressed manner in the hull. The apparatus according to claim 1,
Wherein the propeller is configured to inject the propellant from the rotational surface of the propeller toward an area below the rotational axis of the propeller to accelerate the flow of the fluid.

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