Unlock instant, AI-driven research and patent intelligence for your innovation.

Vortex control cavitation device for ship air layer drag reduction

A technology of cavitation and air layer, applied in the direction of hull, hull design, ship construction, etc., can solve the problems that the air layer at the bottom of the ship is difficult to maintain for a long time, the air layer at the bottom of the ship loses drag reduction ability, and cannot achieve the expected effect. Reduced energy consumption, reduced wetted surface area, and compact structure

Active Publication Date: 2020-08-28
CHINA SHIP SCIENTIFIC RESEARCH CENTER (THE 702 INSTITUTE OF CHINA SHIPBUILDING INDUSTRY CORPORATION)
View PDF11 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, because the vortex system inside the cavitation will interfere with the air layer at the bottom of the ship, it is difficult to maintain the air layer at the bottom of the ship for a long time, resulting in the loss of the drag reduction ability of the air layer at the bottom of the ship, making this technology unable to achieve the expected effect in the application process

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Vortex control cavitation device for ship air layer drag reduction
  • Vortex control cavitation device for ship air layer drag reduction
  • Vortex control cavitation device for ship air layer drag reduction

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0021] The specific implementation manner of the present invention will be described below in conjunction with the accompanying drawings.

[0022] Such as figure 1 and 2 As shown, the present invention mainly includes a cavitation body 1, and the lower end surface of the cavitation body 1 is provided with an air cavity 11 capable of forming a drag-reducing air layer. The left and right sides of the cavitation body 1 are respectively provided with gas collecting plates 6 , and the height dimension of the gas collecting plate 6 is the same as the depth dimension of the air cavity 11 .

[0023] Such as figure 2 As shown, the air pocket 11 is a non-equal depth air pocket, and the distance from the top surface of the air pocket 11 to the bottom end surface changes from small to large from the front of the air pocket 11 to the rear of the air pocket 11, increasing from D1 to D2, and the non-equal depth air pocket The slope satisfies the following formula relationship:

[0024] ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to the technical field of ship drag reduction, in particular to a vortex control cavitation device for ship air layer drag reduction. The device comprises a cavitation body, a cavitation is formed in the lower end face of the cavitation body, an arc-shaped front stable vortex end face is arranged on the vertical inner wall of the front portion of the cavitation body, and a front edge concave cavity is formed between the front stable vortex end face and the inner wall face of the top of the cavitation body. A front flow guide end face is arranged on the front portion of the cavitation body, a plurality of large vortex crushers are fixedly arranged at the rear end of the front flow guide end face, and a part of plate bodies of the large vortex crushers are arranged at an opening of the cavitation body in a suspended mode. The large vortex crusher is arranged on the front flow guide end face in parallel, the large vortex crusher can weaken the interaction between a free shearing layer above an air hole opening and a vortex system in the air hole, and an air layer stably exists at the bottom of the air hole.

Description

technical field [0001] The invention relates to the technical field of ship drag reduction, in particular to a vortex-controlled cavitation device for ship air layer drag reduction. Background technique [0002] The gas lubrication drag reduction technology on the hull surface is to inject an appropriate amount of gas into the bottom of the ship through the gas drag reduction device, form and maintain a thin air layer on the bottom of the ship, effectively separate the bottom of the ship from the water, reduce the wet surface area of ​​the bottom of the ship, and significantly reduce the resistance of the ship An energy saving technology. [0003] At present, the vortex system inside the cavitation will interfere with the air layer at the bottom of the ship, making it difficult to maintain the air layer at the bottom of the ship for a long time, resulting in the loss of drag reduction ability of the air layer at the bottom of the ship, making this technology unable to achiev...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): B63B1/38
CPCB63B1/38B63B2001/387Y02T70/10
Inventor 刘建华高丽瑾
Owner CHINA SHIP SCIENTIFIC RESEARCH CENTER (THE 702 INSTITUTE OF CHINA SHIPBUILDING INDUSTRY CORPORATION)
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com