Ship air layer simulation observation device and ship air layer simulation measurement method

Abstract

The present invention relates to the technical field of ship simulation experimental devices, and specifically discloses a ship air layer simulation observation device and a ship air layer simulation measurement method, wherein the ship air layer simulation observation device comprises a model ship, a cylinder body and a gas injection device, wherein water is stored in the cylinder body, the model ship is arranged in the cylinder body and rotates along a first axis, and the bottom of the model ship is immersed below the water surface; the gas injection device comprises a plurality of gas injection heads, which are arranged on the side of the model ship and are used to continuously inject gas under the hull of the model ship. The device solves the problem that conducting experiments directly on a real ship would consume huge manpower and material resources.

Description

Technical Field

[0001] The invention relates to the technical field of ship simulation experimental devices, and in particular to a ship air layer simulation observation device and a ship air layer simulation measurement method. Background Art

[0002] As IMO gradually increases its requirements for ship energy efficiency indicators, it is difficult to achieve the goal of "increasing the energy efficiency of ships built in 2025 and later by 30% on the existing basis" by relying solely on existing ship type optimization, main engine optimization, and conventional hydrodynamic energy-saving devices. Therefore, the research and development of new ship energy-saving and emission-reduction technologies has become a major topic in the field of ship research and is also favored by ship owners.

[0003] Marine gas lubrication drag reduction technology, through specially designed devices, ventilates the bottom of the ship, forms and maintains a layer of air at the bottom of the ship, isolates the bottom of the ship from the water, reduces the wet surface area, and can significantly reduce the ship's resistance and fuel consumption. It is not restricted by environmental conditions when used, and has a different mechanism and position from existing energy-saving devices such as vortex-eliminating fins and energy-saving ducts, so it can be used in conjunction with other energy-saving devices. It is a new type of ship energy-saving and emission-reduction technology with great potential.

[0004] However, in-depth research is still needed on how to enhance the stability of the air layer, how to form a stable air layer over ultra-long distances, and how to effectively reduce the friction resistance of the bottom of the ship. If the experiment is conducted directly on a real ship, it will consume huge manpower and material resources. Summary of the invention

[0005] The purpose of the present invention is to provide a ship atmosphere simulation observation device and a ship atmosphere simulation measurement method to solve the problem in the related art that conducting experiments directly on a real ship will consume huge manpower and material resources.

[0006] In one aspect, the present invention provides a ship air layer simulation observation device, the ship air layer simulation observation device comprising:

[0007] Model ships;

[0008] A cylinder body, wherein water is stored in the cylinder body, the model ship is arranged in the cylinder body and rotates along a first axis, and the bottom of the model ship is immersed below the water surface;

[0009] The gas injection device comprises a plurality of gas injection heads, which are arranged on the side of the model ship and are used for continuously injecting gas under the hull of the model ship.

[0010] As an optimal technical solution for the ship atmosphere simulation observation device, it also includes a swinging device, which includes a rotating frame, a first rotating shaft and a first connecting member. The model ship is arranged on the rotating frame. Along the direction of the first axis, the first rotating shaft is fixed to the rotating frame, and the first rotating shaft is rotatably connected to the cylinder body through the first connecting member.

[0011] As a preferred technical solution of the ship air layer simulation observation device, the swing device also includes a second rotating shaft and a second connecting member, along the second axis direction, the second rotating shaft is fixedly connected to the model ship, and the second rotating shaft is rotatably connected to the rotating frame through the second connecting member;

[0012] The direction of the first axis is parallel to the length direction of the model ship, and the direction of the second axis is parallel to the width direction of the model ship.

[0013] As a preferred technical solution for the ship atmosphere simulation observation device, the first connecting part includes a first bearing seat and a first bearing. Along the first axial direction, the first bearing seat is fixedly connected to the cylinder body, the inner ring of the first bearing is interference fit with the first rotating shaft, and the outer ring of the first bearing is interference fit with the bearing seat.

[0014] As a preferred technical solution for the ship atmosphere simulation observation device, a plurality of first clamping holes are arranged on the model ship along the first axis direction, a plurality of second clamping holes are arranged on the side wall of the cylinder body along the first axis direction, and also includes a first latch pin, which is selectively connected with the second clamping hole and the first clamping hole opposite to the second clamping hole.

[0015] As a preferred technical solution for the ship atmosphere simulation observation device, the second connecting member includes a second bearing seat and a second bearing. Along the second axial direction, the second bearing seat is fixedly connected to the rotating frame, the second rotating shaft is interference fit with the inner ring of the second bearing, and the second bearing seat is interference fit with the outer ring of the second bearing.

[0016] As a preferred technical solution for the ship atmosphere simulation observation device, a plurality of third clamping holes are arranged on the ship's side along the second axis direction along the height direction of the model ship, the rotating frame is provided with a fourth clamping hole, and also includes a second latch pin, which is passed through the fourth clamping hole and selectively connected with one of the plurality of third clamping holes.

[0017] As an optimal technical solution for the ship atmosphere simulation observation device, the gas injection head includes a connecting pipe and a buffer chamber, one end face of the buffer chamber is connected to the connecting pipe, and the other end face opposite to the one end face of the buffer chamber is provided with an exhaust hole, and the exhaust direction of the exhaust hole is parallel to the bottom of the model ship.

[0018] As a preferred technical solution of the ship air layer simulation observation device, the ship air layer simulation observation device also includes a thickness measurement sensor, which is arranged on the side of the model ship and is used to measure the thickness of the air layer at the bottom of the model ship.

[0019] On the other hand, the present invention provides a ship air layer simulation measurement method, comprising the ship air layer simulation observation device in any of the above schemes, including:

[0020] S100: adjusting the angle of the model ship relative to the water surface;

[0021] S200: continuously spraying gas toward the bottom of the model ship, observing the escape direction of the gas and recording the change data of the thickness of the gas layer.

[0022] The beneficial effects of the present invention are:

[0023] The present invention provides a ship air layer simulation observation device, which comprises: a model ship, a cylinder body and a gas injection device, wherein water is stored in the cylinder body, the model ship is arranged in the cylinder body and rotates along a first axis, and the bottom of the model ship is immersed below the water surface; the gas injection device comprises a plurality of gas injection heads, the plurality of gas injection heads are arranged on the side of the model ship and are used to continuously inject gas to the bottom of the hull of the model ship. Firstly, the model ship is rotated along the first axis direction and fixed at a certain angle, and then the gas is continuously injected to the bottom of the model ship through the gas injection device, so that an air layer is formed on the bottom of the model ship, and the change law of the air layer of the model ship at different angles is analyzed by observing the gas escape situation and the change of the thickness of the air layer and other indicators. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of a ship air layer simulation observation device in an embodiment of the present invention;

[0025] Figure 2 It is a structural schematic diagram of a ship air layer simulation observation device (excluding the cylinder body) in an embodiment of the present invention;

[0026] Figure 3 A schematic diagram of the structure of a gas injection head in an embodiment of the present invention;

[0027] Figure 4 The flowchart of the ship air layer simulation measurement method in the embodiment of the present invention.

[0028] In the figure:

[0029] 1. Model ship; 11. Third clamp hole;

[0030] 2. Cylinder body; 21. Second clamping hole;

[0031] 31. Gas injection head; 311. Connecting pipe; 312. Buffer chamber; 313. Exhaust hole; 32. Connecting pipe; 33. Gas diverter valve; 34. Gas compressor;

[0032] 4. Swinging device; 41. Rotating frame; 411. First clamping hole; 412. Fourth clamping hole;

[0033] 42. First rotating shaft; 43. First connecting member; 44. Second rotating shaft; 45. Second connecting member. DETAILED DESCRIPTION

[0034] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] In the description of the present invention, it should be noted that the orientations or positional relationships indicated by the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions, and the first feature "above", "above" and "above" the second feature include the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. The first feature "below", "below" and "below" the second feature include the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0036] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0038] like Figures 1 to 3 As shown, this embodiment provides a ship air layer simulation observation device, which includes a model ship 1, a cylinder 2 and a gas injection device. Water is stored in the cylinder 2, and the model ship 1 is arranged in the cylinder 2 and rotated along the first axis. The bottom of the model ship 1 is immersed below the water surface; the gas injection device includes a plurality of gas injection heads 31, and the plurality of gas injection heads 31 are arranged on the side of the model ship 1 and are used to continuously inject gas to the bottom of the hull of the model ship 1. First, the model ship 1 is rotated along the first axis and fixed at a certain angle, and then the gas is continuously injected to the bottom of the model ship 1 through the gas injection device, so that an air layer is formed on the bottom of the model ship 1, and the gas escape and the change of the thickness of the air layer are observed to analyze the change law of the air layer of the model ship 1 at different angles.

[0039] In this embodiment, the gas injection device also includes a connecting pipe 32, a gas diverter valve 33 and a gas compressor 34. The gas compressor 34 is connected to the gas diverter valve 33 through the connecting pipe 32. The gas diverter valve 33 is connected to multiple gas injection heads 31 through the connecting pipe 32. The multiple gas injection heads 31 are arranged on the ship's side.

[0040] Optionally, a swing device 4 is further included, the swing device 4 includes a swing frame 41, a first rotating shaft 42 and a first connecting member 43, the model ship 1 is arranged on the swing frame 41, along the first axis direction, the first rotating shaft 42 is fixedly connected to the swing frame 41, and the first rotating shaft 42 is rotationally connected to the cylinder body 2 through the first connecting member 43. In this embodiment, the swing frame 41 is a frame structure, the model ship 1 is arranged in the frame of the swing frame 41, the number of the first connecting member 43 and the first rotating shaft 42 is the same, which can be one or two, and the most preferred is two, the two first rotating shafts 42 are respectively fixedly arranged on the two side walls of the cylinder body 2 opposite to the swing frame 41 along the first axis direction, and the two first connecting members 43 respectively connect the two first rotating shafts 42 to the two side walls of the cylinder body 2 along the first axis direction in a one-to-one correspondence.

[0041] Optionally, the swing device 4 further includes a second rotating shaft 44 and a second connecting member 45. The second rotating shaft 44 is fixedly connected to the model ship 1 along the second axis direction, and the second rotating shaft 44 is rotationally connected to the rotating frame 41 through the second connecting member 45; the direction of the first axis is parallel to the length direction of the model ship 1, and the direction of the second axis is parallel to the width direction of the model ship 1. In this embodiment, the number of the second connecting members 45 and the second rotating shaft 44 is the same, which can be one or two, and the most preferred is two. The two second rotating shafts 44 are respectively fixed on the side of the model ship 1 along the second axis direction, and the two second connecting members 45 respectively connect the two second rotating shafts 44 to the two side walls of the rotating frame 41 along the second axis direction in a one-to-one correspondence, and the second rotating shaft 44 is fixedly connected to the model ship 1 through a connecting flange.

[0042] Optionally, the first connecting member 43 includes a first bearing seat and a first bearing, and along the first axis direction, the first bearing seat is fixedly connected to the cylinder body 2, the inner ring of the first bearing is interference fit with the first rotating shaft 42, and the outer ring of the first bearing is interference fit with the bearing seat. In this embodiment, the swing device 4 also includes a crank, and the first rotating shaft 42 extends out of the first bearing seat and is fixedly connected to the crank.

[0043] Optionally, a plurality of first clamping holes 411 are provided on the model ship 1 along the first axis direction, a plurality of second clamping holes 21 are provided on the side wall of the cylinder body 2 along the first axis direction, and a first latch is further provided, and the first latch is selectively pinned with the second clamping hole 21 and the first clamping hole 411 opposite to the second clamping hole 21. In this embodiment, one of the plurality of first clamping holes 411 is pinned with one of the plurality of second clamping holes 21, so that different angles (-20°, -15°, -10°, -5°, 5°, 10°, 15°, 20°) are formed between the model ship 1 and the water surface along the second direction.

[0044] Optionally, the second connecting member 45 includes a second bearing seat and a second bearing. Along the second axis direction, the second bearing seat is fixedly connected to the rotating frame 41, the second rotating shaft 44 is interference fit with the inner ring of the second bearing, and the second bearing seat is interference fit with the outer ring of the second bearing.

[0045] Optionally, a plurality of third clamping holes 11 are provided on the side of the model ship 1 along the height direction of the model ship 1 along the second axis, the rotating frame 41 is provided with a fourth clamping hole 412, and further includes a second latch pin, the second latch pin is passed through the fourth clamping hole 412 and selectively pinned with one of the plurality of third clamping holes 11. In this embodiment, the plurality of third clamping holes 11 are provided on the side of the model ship 1 along the second axis in the height direction of the model ship 1, the fourth clamping hole 412 is pinned with one of the third clamping holes 11, so that an angle (-15°, -10°, -5°, 5°, 10°, 15°) is formed between the model ship 1 and the water surface along the first direction.

[0046] Optionally, the gas injection head 31 includes a connecting pipe 311 and a buffer chamber 312, one end face of the buffer chamber 312 is connected to the connecting pipe 311, and the other end face opposite to the one end face of the buffer chamber 312 is provided with an exhaust hole 313, and the exhaust direction of the exhaust hole 313 is parallel to the bottom of the model ship 1. In this embodiment, the exhaust direction of the exhaust hole 313 is parallel to the bottom of the model ship 1, so that the bottom of the model ship 1 and the air layer formed by the bottom of the model ship 1 fit each other.

[0047] Optionally, the buffer chamber 312 is a wedge-shaped structure, and the cross-sectional area of ​​the buffer chamber 312 gradually increases along the height direction of the model ship 1. In this embodiment, after the gas enters the buffer chamber 312, the gas moves from the air inlet to the exhaust hole 313. During this process, the cross-sectional area of ​​the buffer chamber 312 gradually decreases, so the pressure of the gas also gradually increases. Therefore, the gas ejected from the exhaust hole 313 can form an air layer on the bottom of the model ship 1.

[0048] Optionally, the ship air layer simulation observation device further includes a thickness measurement sensor, which is arranged on the side of the model ship 1 and is used to measure the thickness of the air layer at the bottom of the model ship 1. In this embodiment, the thickness sensor measures the thickness of the air layer at the bottom of the model ship 1 in real time, and transmits the measured data to the computer for analysis.

[0049] like Figure 4 As shown, this embodiment provides a ship air layer simulation measurement method, including the ship air layer simulation observation device in any of the above embodiments, including:

[0050] S100: Adjusting the angle of the model ship 1 relative to the water surface.

[0051] When conducting experiments with this device, there are three angle experimental modes:

[0052] Mode 1: The angle of the model ship 1 along the second direction is adjusted and fixed to 0°, and the fourth clamping hole 412 of the rotating frame 41 is fixed to one of the third clamping holes 11 of the model ship 1 by the second latch, so as to form different angles of the model ship 1 along the first direction (-15°, -10°, -5°, 5°, 10°, 15°).

[0053] Mode 2: The angle of the model ship 1 along the first direction is adjusted and fixed to 0°, and one of the multiple second clamping holes 21 on the cylinder body 2 is fixed to the first clamping hole 411 on the rotating frame 41 by using the first pin to form different angles of the model ship 1 along the second direction (-20°, -15°, -10°, -5°, 5°, 10°, 15°, 20°).

[0054] Mode three: adjust and fix the angle of the model ship 1 along the first direction to any one of -15°, -10°, -5°, 5°, 10°, 15°, and observe different angles of the model ship 1 along the second direction (-20°, -15°, -10°, -5°, 5°, 10°, 15°, 20°).

[0055] S200: Continuously spray gas toward the bottom of the model ship 1, observe the escape direction of the gas, and record the change data of the gas layer thickness.

[0056] The gas layer thickness measurement sensor records the data of the gas layer thickness at the bottom of the model ship in real time, and the camera records the escape direction of the gas.

[0057] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A ship air layer simulation observation device, characterized in that: include: Model ship (1); A cylinder (2), wherein water is stored in the cylinder (2), the model ship (1) is arranged in the cylinder (2) and rotates along a first axis, the direction of the first axis is parallel to the length direction of the model ship (1), and the bottom of the model ship (1) is immersed below the water surface; A gas injection device, the gas injection device comprising a plurality of gas injection heads (31), the plurality of gas injection heads (31) being arranged on the side of the model ship (1) and used for continuously injecting gas below the hull of the model ship (1); The gas injection device further comprises a connecting pipe (32), a gas diverter valve (33) and a gas compressor (34); the gas compressor (34) is connected to the gas diverter valve (33) via the connecting pipe (32); and the gas diverter valve (33) is connected to the plurality of gas injection heads (31) via the connecting pipe (32).

2. The ship atmosphere simulation observation device according to claim 1, characterized in that: The invention also comprises a swing device (4), the swing device (4) comprising a rotating frame (41), a first rotating shaft (42) and a first connecting member (43), the model ship (1) is arranged on the rotating frame (41), the first rotating shaft (42) is fixedly connected to the rotating frame (41) along the first axis direction, and the first rotating shaft (42) is rotatably connected to the cylinder body (2) via the first connecting member (43).

3. The ship atmosphere simulation observation device according to claim 2, characterized in that: The swing device (4) further comprises a second rotating shaft (44) and a second connecting member (45); the second rotating shaft (44) is fixedly connected to the model ship (1) along a second axis direction, and the second rotating shaft (44) is rotatably connected to the rotating frame (41) via the second connecting member (45); The direction of the second axis is parallel to the width direction of the model ship (1).

4. The ship air layer simulation observation device according to claim 2, characterized in that: The first connecting member (43) comprises a first bearing seat and a first bearing. Along the first axial direction, the first bearing seat is fixedly connected to the cylinder body (2), the inner ring of the first bearing is interference fit with the first rotating shaft (42), and the outer ring of the first bearing is interference fit with the bearing seat.

5. The ship air layer simulation observation device according to claim 2, characterized in that: A plurality of first clamping holes (411) are provided on the model ship (1) along the first axis direction, a plurality of second clamping holes (21) are provided on the side wall of the cylinder body (2) along the first axis direction, and a first latch pin is also provided. The first latch pin is selectively pinned to the second clamping hole (21) and the first clamping hole (411) opposite to the second clamping hole (21).

6. The ship air layer simulation observation device according to claim 3, characterized in that: The second connecting member (45) comprises a second bearing seat and a second bearing. Along the second axial direction, the second bearing seat is fixedly connected to the rotating frame (41), the second rotating shaft (44) is interference fit with the inner ring of the second bearing, and the second bearing seat is interference fit with the outer ring of the second bearing.

7. The ship air layer simulation observation device according to claim 3, characterized in that: A plurality of third latching holes (11) are arranged on the ship's side along the second axis direction in the height direction of the model ship (1); the rotating frame (41) is provided with a fourth latching hole (412) and also includes a second latching pin, the second latching pin is passed through the fourth latching hole (412) and selectively pin-connected with one of the plurality of third latching holes (11).

8. The ship atmosphere simulation observation device according to claim 1, characterized in that: The gas injection head (31) comprises a connecting pipe (311) and a buffer chamber (312); one end face of the buffer chamber (312) is in communication with the connecting pipe (311); the other end face opposite to the one end face of the buffer chamber (312) is provided with an exhaust hole (313); the exhaust direction of the exhaust hole (313) is parallel to the bottom of the model ship (1).

9. The ship atmosphere simulation observation device according to any one of claims 1 to 8, characterized in that: The ship air layer simulation observation device also includes a thickness measurement sensor, which is arranged on the side of the model ship (1) and is used to measure the thickness of the air layer at the bottom of the model ship (1).

10. A ship air layer simulation measurement method, comprising the ship air layer simulation observation device according to any one of claims 1 to 9, characterized in that: include: S100: adjusting the angle of the model ship (1) relative to the water surface; S200: Continuously spraying gas toward the bottom of the model ship (1), observing the escape direction of the gas and recording data on changes in the thickness of the gas layer.

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