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WO-2026092349-A1 - SHIP BUBBLE DRAG REDUCTION DETECTION DEVICE AND SHIP

WO2026092349A1WO 2026092349 A1WO2026092349 A1WO 2026092349A1WO-2026092349-A1

Abstract

A ship bubble drag reduction detection device and a ship. The ship bubble drag reduction detection device comprises a bubble generation unit (1), a light source emission unit (2) and a detection unit, wherein the bubble generation unit (1) is fixed to the bottom of a hull (100), the bubble generation unit (1) can generate bubbles, and the bubbles can be attached to the bottom of the hull (100) to form a bubble attachment region (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) and illuminates the bubble attachment region (110). The detection unit is arranged at the bottom of the hull (100), and can collect and analyze images of the bubble flow in the bubble attachment region (110).

Inventors

  • XU, JINGJING
  • LIU, PENG
  • SUN, Haisu
  • LU, Chenliang

Assignees

  • 上海船舶研究设计院

Dates

Publication Date
20260507
Application Date
20251027
Priority Date
20241030

Claims (10)

  1. A ship bubble drag reduction detection device, comprising: A bubble generating unit (1) is fixed to the bottom of the hull (100). The bubble generating unit (1) can generate bubbles, and the bubbles can adhere to the bottom of the hull (100) to form a bubble attachment area (110). A light source emitting unit (2) is disposed at the bottom of the hull (100). The light source emitting unit (2) emits light to the bottom of the hull (100) and illuminates the bubble attachment area (110). The detection unit is located at the bottom of the hull (100) and is capable of acquiring and analyzing images of the bubble flow in the bubble attachment area (110).
  2. According to claim 1, the ship bubble drag reduction detection device includes an image acquisition unit (3) which is capable of acquiring images of the bubble attachment area (110).
  3. According to claim 2, the ship bubble drag reduction detection device further includes an image analyzer, which is signal-connected to the image acquisition unit (3) and is used to receive images acquired by the image acquisition unit (3).
  4. According to claim 1, the ship bubble drag reduction detection device includes an air compressor (11) disposed inside the hull (100) and the air compressor (11) is used to generate the bubble.
  5. According to claim 4, the ship bubble drag reduction detection device further includes a bubble generating unit (1) and a bubble spreading mechanism (12), which is installed on the bottom wall of the hull (100), and the air compressor (11) is connected to the bubble spreading mechanism (12).
  6. According to claim 5, the ship bubble drag reduction detection device further includes a pressure controller (13) connected between the air compressor (11) and the bubble spreading mechanism (12).
  7. According to claim 1, the ship bubble drag reduction detection device includes a laser (21) which is installed at the bottom of the hull (100) and is capable of emitting laser light to the bubble attachment area (110).
  8. According to claim 7, the ship bubble drag reduction detection device further includes a light source emitting unit (2) and a light source reflector (22). The laser (21) is capable of emitting laser light to the light source reflector (22), and the light source reflector (22) is capable of reflecting the laser light to the bubble attachment area (110).
  9. A vessel includes a hull (100) and a vessel bubble drag reduction detection device according to any one of claims 1-8, the vessel bubble drag reduction detection device being disposed at the bottom of the hull (100).
  10. According to claim 9, the ship is provided with a plurality of ship bubble drag reduction detection devices, which are arranged along the direction of the ship's movement at the bottom of the hull (100).

Description

Ship bubble drag reduction detection device and ship This application claims priority to Chinese Patent Application No. 202411526174.1, filed on October 30, 2024, and Chinese Patent Application No. 202422627639.4, filed on October 30, 2024, the entire contents of which are incorporated herein by reference. Technical Field This application relates to the field of ship drag reduction technology, for example to a ship bubble drag reduction detection device and a ship. Background Technology The modern world faces increasingly severe energy shortages and environmental pollution problems. The shipbuilding industry needs a scientific and economical approach to achieve sustainable development. One of the most important ways to improve ship economics is to reduce ship drag. In related technologies, to reduce drag during ship navigation, bubble drag reduction devices are installed at the bottom of the hull. During ship navigation, tiny bubbles of a certain volume are generated on the hull surface. A large number of bubbles accumulate 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, thus achieving the purpose of drag reduction. Traditional bubble drag reduction devices can only control the generation and release of bubbles. Due to the significant diffusion of bubbles near the hull wall in the mid-to-aft section, the near-wall drag reduction effect drops sharply. Traditional testing techniques cannot monitor the bubble distribution and bubble flow at the bottom of the hull in real time, and the bubble drag reduction device can interfere with the flow field when collecting flow field information, resulting in poor drag reduction and detection effects. Summary of the Invention One objective of this application is to provide a ship bubble drag reduction detection device that can collect and analyze transient full-field flow characteristics without disturbing the flow field under test, and more accurately and comprehensively capture and monitor the gas-liquid two-phase flow at the bottom of the ship. To achieve this objective, the following technical solution is adopted in this application: A ship bubble drag reduction detection device is provided, comprising: A bubble generating unit is fixed to the bottom of the hull. The bubble generating unit can generate bubbles that can adhere to the bottom of the hull, forming a bubble attachment area. A light source emitting unit is disposed at the bottom of the hull, and the light source emitting unit emits light towards the bottom of the hull and illuminates the bubble attachment area; A detection unit is installed at the bottom of the hull and is capable of acquiring and analyzing images of the flow of bubbles in the bubble attachment area. In some embodiments, the detection unit includes an image acquisition device capable of acquiring images of the bubble attachment area. In some embodiments, the detection unit further includes an image analyzer, which is signal-connected to the image acquisition unit and is used to receive images acquired by the image acquisition unit. In some embodiments, the bubble generating unit includes an air compressor disposed within the hull of the ship, the air compressor being used to generate the bubbles. In some embodiments, the bubble generating unit further includes a bubble dispensing mechanism, which is installed on the bottom wall of the hull, and the air compressor is connected to the bubble dispensing mechanism. In some embodiments, the bubble generating unit further includes a pressure controller connected between the air compressor and the bubble dispensing mechanism. In some embodiments, the light source emitting unit includes a laser, which is mounted on the bottom of the hull and is capable of emitting laser light toward the bubble attachment area. In some embodiments, the light source emitting unit further includes a light source reflector, the laser being able to emit laser light toward the light source reflector, and the light source reflector being able to reflect the laser light toward the bubble attachment area. Another objective of this application is to provide a vessel capable of real-time monitoring of drag-reducing bubbles at the hull bottom during operation, thereby more accurately and comprehensively capturing and monitoring the flow of the gas-liquid two-phase flow at the hull bottom. To achieve this objective, the following technical solution is adopted in this application: A ship is provided, including a hull and the aforementioned ship bubble drag reduction detection device, wherein the ship bubble drag reduction detection device is disposed at the bottom of the hull. In some embodiments, the vessel includes a plurality of the vessel bubble drag reduction detection devices, which are arranged along the direction of the vessel's movement on the bottom of the hull. Attached Figure Description Figure 1 is a