Ship bubble resistance reduction detection device and ship

Abstract

The utility model belongs to the technical field of ship resistance reduction, and discloses a ship bubble resistance reduction detection device and a ship. The ship bubble resistance reduction detection device comprises a bubble generation unit, a light source emission unit and a detection unit, the bubble generation unit is fixed to the bottom of a ship body, the bubble generation unit can generate bubbles, and the bubbles can be attached to the bottom of the ship body to form a bubble attachment area. The light source emitting unit is arranged at the bottom of the ship body and emits light to the bottom of the ship body and illuminates the bubble attachment area. The detection unit is arranged at the bottom of the ship body and can collect and analyze images of bubble flowing conditions in the bubble attachment area. According to the ship bubble resistance reduction detection device, under the condition that a flow field at the bottom of a ship body is not influenced, the resistance of the ship during advancing can be reduced, the energy consumption of ship body operation can be reduced, the flow condition of the flow field at the bottom of the ship body can be monitored in real time, and good academic significance and practical engineering significance are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of ship drag reduction, in particular to a ship bubble drag reduction detection device and a ship. Background Technique

[0002] The modern world is facing increasingly serious problems of energy shortage and environmental pollution. The ship industry needs scientific and economic ways to achieve sustainable development. One of the most important ways to improve ship economy is ship drag reduction. In the prior art, in order to reduce the resistance during ship navigation, a bubble drag reduction device is installed at the bottom of the ship hull. When the ship is sailing, a certain volume of tiny bubbles are generated on the surface of the ship hull. A large number of bubbles gather at the bottom of the ship hull to form a gas-liquid two-phase flow, thereby reducing the density, viscosity and turbulent flow structure of the water around the ship hull, and further achieving the purpose of drag reduction.

[0003] The traditional bubble drag reduction device can only control the generation and release of bubbles. Due to the significant diffusion problem of the near-wall bubbles in the middle and rear sections of the ship hull, the near-wall drag reduction effect drops sharply. The traditional testing technology cannot monitor the distribution of bubbles and the bubble flow at the bottom of the ship hull in real time, and the bubble drag reduction device will interfere with the flow field when collecting flow field information, resulting in poor drag reduction and detection effects.

[0004] Therefore, there is an urgent need for a ship bubble drag reduction detection device and a ship to solve the above problems. Content of the Utility Model

[0005] An object of the utility model is to provide a ship bubble drag reduction detection device, which can collect and analyze the transient full-flow field flow characteristics without disturbing the flow field to be measured, and more accurately and comprehensively capture and monitor the flow of the gas-liquid two-phase flow at the bottom of the ship hull.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] Provide a ship bubble drag reduction detection device, including:

[0008] A bubble generation unit, which is fixed at the bottom of the ship hull. The bubble generation unit can generate bubbles, and the bubbles can adhere to the bottom of the ship hull to form a bubble adhesion area;

[0009] A light source emission unit, which is arranged at the bottom of the ship hull. The light source emission unit emits light towards the bottom of the ship hull and illuminates the bubble adhesion area;

[0010] A detection unit, which is arranged at the bottom of the ship hull and can collect and analyze images of the bubble flow in the bubble adhesion area.

[0011] As an alternative solution for the ship bubble drag reduction detection device, the detection unit includes an image collector, and the image collector is capable of collecting an image of the bubble attachment area.

[0012] As an alternative solution for the ship bubble drag reduction detection device, the detection unit further includes an image analyzer, and the image analyzer is signal-connected to the image collector for receiving the image collected by the image collector.

[0013] As an alternative solution for the ship bubble drag reduction detection device, the bubble generation unit includes an air compressor, the air compressor is arranged inside the ship hull, and the air compressor is used for generating the bubbles.

[0014] As an alternative solution for the ship bubble drag reduction detection device, the bubble generation unit further includes a bubble spreading mechanism, the bubble spreading mechanism is installed on the bottom wall of the ship hull, and the air compressor is communicated with the bubble spreading mechanism.

[0015] As an alternative solution for the ship bubble drag reduction detection device, the bubble generation unit further includes a pneumatic controller, and the pneumatic controller is communicated between the air compressor and the bubble spreading mechanism.

[0016] As an alternative solution for the ship bubble drag reduction detection device, the light source emission unit includes a laser, the laser is installed at the bottom of the ship hull, and the laser is capable of emitting laser light to the bubble attachment area.

[0017] As an alternative solution for the ship bubble drag reduction detection device, the light source emission unit further includes a light source reflector, the laser is capable of emitting laser light to the light source reflector, and the light source reflector is capable of reflecting the laser light to the bubble attachment area.

[0018] Another object of the present invention is to provide a ship that can monitor the drag reduction bubbles at the bottom of the ship during operation in real time and capture the flow of the gas-liquid two-phase flow at the bottom of the hull more accurately and comprehensively.

[0019] To achieve this purpose, the present invention adopts the following technical solutions:

[0020] Provide a ship, including a ship hull and the above-mentioned ship bubble drag reduction detection device, and the ship bubble drag reduction detection device is arranged at the bottom of the ship hull.

[0021] As an alternative solution for the ship, the ship includes a plurality of the ship bubble drag reduction detection devices, and the plurality of ship bubble drag reduction detection devices are arranged along the advancing direction of the ship at the bottom of the ship hull.

[0022] The beneficial effects of the present invention:

[0023] The utility model provides a ship bubble drag reduction detection device. A bubble generating unit is arranged at the bottom of the ship hull. The generated bubbles gather and adhere to the bottom of the ship hull to form a gas-liquid two-phase flow, thereby reducing the density, viscosity and turbulent flow structure of the water around the ship hull, and achieving the effect of reducing the resistance during the forward movement of the ship hull. A light source emitting unit is used to generate a light beam, and this light beam irradiates on the bubble adhesion area. A detection unit is used to capture the distribution image of the bubbles on the bubble adhesion area at the bottom of the ship hull in real time. Through image analysis, the flow characteristics of the flow field at the bottom of the ship hull are obtained, and the real-time monitoring of the smoothness of the bottom of the ship hull is realized. The ship bubble drag reduction detection device can reduce the resistance when the ship is moving forward without affecting the flow field at the bottom of the ship hull, ensure the effect of reducing resistance, reduce the energy consumption of the ship operation, and can also monitor the flow condition of the flow field at the bottom of the ship hull in real time, which has good academic significance and practical engineering significance.

[0024] The utility model also provides a ship, which includes a ship hull and the above-mentioned ship bubble drag reduction detection device. The ship bubble drag reduction detection device is installed at the bottom of the ship hull, which can reduce the resistance when the ship is moving forward and monitor the flow condition of the flow field at the bottom of the ship hull in real time, which is beneficial to reducing the ship operation cost. Description of the Drawings

[0025] Figure 1 is a schematic structural diagram of the ship bubble drag reduction detection device provided by the utility model;

[0026] Figure 2 is a schematic structural diagram of the ship provided by the utility model.

[0027] In the figure:

[0028] 1. Bubble generating unit; 11. Air compressor; 12. Bubble spreading mechanism; 13. Air pressure controller; 14. Air pipe;

[0029] 2. Light source emitting unit; 21. Laser; 22. Light source reflector;

[0030] 3. Image collector;

[0031] 100. Ship hull; 110. Bubble adhesion area. Detailed Embodiments

[0032] The following further describes the present utility model in detail with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present utility model, rather than limiting the present utility model. In addition, it should be noted that for the convenience of description, only some parts related to the present utility model are shown in the drawings instead of all the structures.

[0033] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0034] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "over", and "on top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "beneath", and "under" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0035] In the description of this embodiment, the orientation or positional relationships such as "above", "below", "right", etc. are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of description and simplifying the operation, 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 thus should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0036] As Figure 1 shown, the ship bubble drag reduction detection device of this embodiment includes a bubble generation unit 1, a light source emission unit 2, and a detection unit. The bubble generation unit 1 is fixed to the bottom of the hull 100. The bubble generation unit 1 can generate bubbles, and the bubbles can adhere to the bottom of the hull 100 to form a bubble adhesion area 110. The light source emission unit 2 is arranged at the bottom of the hull 100, and the light source emission unit 2 emits light towards the bottom of the hull 100 to illuminate the bubble adhesion area 110. The detection unit is arranged at the bottom of the hull 100 and can collect and analyze the images of the bubble flow situation in the bubble adhesion area 110.

[0037] Based on the above design, the ship bubble drag reduction detection device provided in this embodiment arranges a bubble generation unit 1 at the bottom of the hull 100. The generated bubbles gather and adhere to the bubble adhesion area 110 at the bottom of the hull, forming a gas-liquid two-phase flow, thereby reducing the density, viscosity, and turbulent flow structure of the water around the hull, and achieving the effect of reducing the resistance during the forward movement of the hull 100. A light source emission unit 2 is used to generate a light beam, and this light beam irradiates the bubble adhesion area 110. The detection unit is used to capture the distribution image of the bubbles on the bubble adhesion area 110 at the bottom of the ship in real time. Through image analysis, the flow field flow characteristics at the bottom of the hull 100 are obtained, realizing the real-time monitoring of the smoothness at the bottom of the hull 100. This ship bubble drag reduction detection device can reduce the resistance during the forward movement of the ship without affecting the flow field at the bottom of the hull 100, ensure the effect of reducing resistance, reduce the energy consumption of the operation of the hull 100, and can also monitor the flow condition of the flow field at the bottom of the hull in real time, having good academic significance and practical engineering significance.

[0038] It should be noted that for flow field testing technologies, traditional testing technologies such as hot-wire anemometry (HWFA) and laser Doppler velocimetry (LDV), etc., these methods can only obtain information at a single point in space. When measuring and capturing transient comprehensive flow field information, they will disrupt the bubble flow field and cause measurement errors. In this embodiment, the particle image velocimetry (PIV) testing technology is used for measurement, which can be used to measure the gas-liquid velocity field. Compared with traditional methods such as hot-wire anemometry (HWFA) and laser Doppler velocimetry (LDV), it will not disrupt the bubble flow field, can monitor a more real operating scenario, and greatly improve the measurement accuracy. Moreover, PIV can obtain the transient full flow field flow condition, making the information collected by the measurement more comprehensive. And, traditional PIV testing technology requires setting tracer particles. By monitoring the tracer particles and calculating the scientific calculation results based on the displacement and time interval of different tracer particles in the flow field image. In this embodiment, the bubbles are used as tracer particles, eliminating the need for additional spreading of tracer particles, and not polluting the marine and river environments, being green and environmentally friendly.

[0039] Furthermore, this ship bubble drag reduction detection device also plays a certain role in the scientific research of ship bubble drag reduction technology. This device can be used to measure and conduct mechanistic research on ship bubble drag reduction technology, such as: measuring and studying the influence of the wake flow at the bow of different ships on the bubble stability; verifying the numerical simulation method for the gas lubrication drag reduction design of full-scale shipping ships; assisting in the gas lubrication energy-saving and carbon-reducing adaptive regulation based on ship navigation state monitoring, etc.

[0040] Further, the bubble generating unit 1 includes an air compressor 11, a bubble spreading mechanism 12, and an air delivery pipe 14. The air compressor 11 is disposed inside the hull 100, the bubble spreading mechanism 12 is installed on the bottom wall of the hull 100, and the air compressor 11 and the bubble spreading mechanism 12 are connected in communication. The air compressor 11 and the bubble spreading mechanism 12 are connected in communication through the air delivery pipe 14. The air compressor 11 is used to generate bubbles, and the bubbles are delivered to the bubble spreading mechanism 12 through the air delivery pipe 14. The bubble spreading mechanism 12 releases bubbles into the bubble attachment area 110 through a porous structure to form a bubble flow.

[0041] Preferably, the bubble generating unit 1 further includes a pneumatic controller 13. The air compressor 11, the pneumatic controller 13, and the bubble spreading mechanism 12 are sequentially connected in communication through the air delivery pipe 14. The bubbles are adjusted in air pressure through the pneumatic controller 13, and the pressurized bubbles are delivered into the bubble spreading mechanism 12 through the air delivery pipe 14, and the bubbles are released into the bubble attachment area 110 through the bubble spreading mechanism 12 to form a bubble flow. The pneumatic controller 13 can control the delivery pressure of the bubbles, thereby controlling the delivery speed of the bubbles, and controlling the air volume ratio of each bubble spreading mechanism 12, so that the bubbles cover more completely and evenly, and further improving the drag reduction effect.

[0042] Further, the light source emitting unit 2 includes a laser 21. The laser 21 is installed at the bottom of the hull 100. The laser 21 can emit laser light to the bubble attachment area 110, providing a light source for the bubble attachment area 110, illuminating the bubbles in the bubble attachment area 110, and eliminating the need for additional spreading of tracer particles, ensuring that the image collector 3 can collect clear images. In this embodiment, the laser 21 forms a sheet light source to illuminate the bubble attachment area 110.

[0043] Optionally, the light source emitting unit 2 further includes a light source reflector 22. The laser 21 can emit laser light to the light source reflector 22, and the light source reflector 22 can reflect the laser light to the bubble attachment area 110. By providing the light source reflector 22, the propagation path of the laser light can be changed. When the position of the bubble attachment area 110 needs to be adjusted, the laser light can be adjusted to irradiate the bubble attachment area 110 by adjusting the light source reflector 22. Exemplarily, the light source reflector 22 can be set as a reflector mirror, a metal reflector, etc.

[0044] Further, the detection unit includes an image collector 3 and an image analyzer (not shown in the figure). The image collector 3 is used to collect images of the bubble attachment area 110. The image analyzer is signal-connected to the image collector 3 and is used to receive and analyze the images collected by the image collector 3. Optionally, the image collector 3 is a high-speed camera, and cross-correlation analysis is performed on the collected bubble images to conduct computational research on the flow field at the bottom of the ship.

[0045] As Figure 2As shown in the figure, this embodiment also provides a ship, which includes a hull 100 and the above-mentioned ship bubble drag reduction detection device. The ship bubble drag reduction detection device is arranged at the bottom of the hull 100 to monitor the bubble flow at the bottom of the hull 100 in real time and precisely measure the flow field at the bottom of the ship. This ship can monitor the distribution of bubbles at the bottom of the ship and the surrounding flow field in real time, reduce the ship driving cost, and improve the working efficiency of the bubble drag reduction device.

[0046] Furthermore, multiple ship bubble drag reduction detection devices are arranged on the bottom of the hull 100 along the advancing direction of the ship, so that the bubbles cover the entire length of the ship, ensuring that the bubbles of the bubble drag reduction detection device are more continuous and complete. Exemplarily, along the advancing direction of the ship, three, four, six, etc. ship bubble drag reduction detection devices can be arranged.

[0047] Obviously, the above embodiments of the present utility model are merely examples for clearly explaining the present utility model, rather than limitations on the implementation manners of the present utility model. For those of ordinary skill 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 implementation manners here. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present utility model shall be included within the protection scope of the claims of the present utility model.

Claims

1. A ship bubble drag reduction detection device, characterized in that Comprising: A bubble generating unit (1), the bubble generating unit (1) being fixed to the bottom of the hull (100), the bubble generating unit (1) being capable of generating bubbles, and the bubbles being capable of adhering to the bottom of the hull (100) to form a bubble adhesion area (110); A light source emitting unit (2), the light source emitting unit (2) being provided at the bottom of the hull (100), the light source emitting unit (2) emitting light towards the bottom of the hull (100) and illuminating the bubble adhesion area (110); A detection unit, the detection unit being provided at the bottom of the hull (100) and capable of collecting and analyzing an image of the bubble flow condition in the bubble adhesion area (110).

2. The ship bubble drag reduction detection device according to claim 1, characterized in that The detection unit includes an image collector (3), the image collector (3) being capable of collecting an image of the bubble adhesion area (110).

3. The ship bubble drag reduction detection device according to claim 2, characterized in that, The detection unit further includes an image analyzer, the image analyzer being in signal connection with the image collector (3) and being used for receiving the image collected by the image collector (3).

4. The ship bubble drag reduction detection device according to claim 1, characterized in that The bubble generating unit (1) includes an air compressor (11), the air compressor (11) being provided inside the hull (100), and the air compressor (11) being used for manufacturing the bubbles.

5. The ship bubble drag reduction detection device according to claim 4, characterized in that, The bubble generating unit (1) further includes a bubble spreading mechanism (12), the bubble spreading mechanism (12) being installed on the bottom wall of the hull (100), and the air compressor (11) and the bubble spreading mechanism (12) being in communication.

6. The ship bubble drag reduction detection device according to claim 5, characterized in that The bubble generating unit (1) further includes a pneumatic pressure controller (13), the pneumatic pressure controller (13) being connected between the air compressor (11) and the bubble spreading mechanism (12).

7. The ship bubble drag reduction detection device according to claim 1, characterized in that The light source emitting unit (2) includes a laser (21), the laser (21) being installed at the bottom of the hull (100), and the laser (21) being capable of emitting laser light towards the bubble adhesion area (110).

8. The ship bubble drag reduction detection device according to claim 7, characterized in that The light source emitting unit (2) further includes a light source reflector (22), the laser (21) being capable of emitting laser light towards the light source reflector (22), and the light source reflector (22) being capable of reflecting the laser light to the bubble adhesion area (110).

9. A ship, characterized in that, Comprising a hull (100) and a ship bubble drag reduction detection device according to any one of claims 1-8, the ship bubble drag reduction detection device being provided at the bottom of the hull (100).

10. The ship according to claim 9, characterized in that, The ship is provided with a plurality of the ship bubble drag reduction detection devices, and the plurality of ship bubble drag reduction detection devices are arranged along the advancing direction of the ship at the bottom of the hull (100).

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