Multi-section ventilation drag reduction method and device applied for high-speed water surface boat

A drag reduction device and surface craft technology, which is applied to ships, transportation and packaging, hydrodynamic characteristics/hydrostatic characteristics, etc., and can solve problems such as interference with cavitation flow, unstable force, and poor drag reduction effect. , to avoid interference and reduce the effect of gravity drift

Active Publication Date: 2019-07-26
HARBIN ENG UNIV
View PDF6 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This arrangement does not take into account the interference of the strut structure on the supercavitation shape, and the pressure distribution near the strut will seriously interfere with the cavitation flow, which will increase the wetted area and lead to poor drag reduction effect
At the same time, due to the lack of development of the current propulsion device, the speed of the flying body

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
  • Multi-section ventilation drag reduction method and device applied for high-speed water surface boat
  • Multi-section ventilation drag reduction method and device applied for high-speed water surface boat
  • Multi-section ventilation drag reduction method and device applied for high-speed water surface boat

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0039] Example 1:

[0040] It will be described in detail with a speed of 40 knots and three annular cavitations.

[0041] Four supercavitations connected in series are generated by the disc cavities (1) and the annular cavities (3), (4) and (5), which respectively wrap the part between itself and the next cavitation. The annular cavitation device (3) is arranged a short distance behind the front edge of the pillar structure (2). Prevent the pillar structure (2) from interfering with the cavitation generated by the annular cavitator. Then reduce the wetted area, reduce the interference of the pillar to the stability of the supercavitation, and achieve the purpose of reducing the resistance. The pillar structure (2) is arranged on the cylindrical section of the lower submerged body (6), which is convenient for production and processing. The gas is delivered to each exhaust hole (9) through the air-entraining groove (8), and then flows out along the air-guiding tile (7) on the bac...

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 discloses a multi-section ventilation drag reduction method and device applied for a high-speed water surface boat. The device includes a disc cavitator, a pillar structure, a ring-shaped cavitator, a diving body, an air guiding tile, an air inlet groove, and an air exhausting hole, wherein an axis of the disc cavitator is downward inclined, the ring-shaped cavitator is arranged behind the front edge of the pillar structure, the pillar structure is arranged in the middle section of the diving body, a ventilation device is arranged behind the ring-shaped cavitator, and an includedangle between the incident flow surface of the ring-shaped cavitator and the incoming flow direction is 45 degrees. According to the multi-section ventilation drag reduction method and device appliedfor the high-speed water surface boat, a certain attack angle is arranged on the axis of the head part ring-shaped cavitator, and influence of the partial gravity effect on a cavitation form can be offset; and a great deal of cavitator is adopted, interference of a pillar on the cavitation is avoided, and the effect of adverse factors such as gravity floating and instability of ventilation supercavitation on the cavitation is weakened.

Description

technical field [0001] The invention relates to a ventilation method and a device for a surface boat, in particular to a multi-section ventilation drag reduction method and a device for a high-speed surface boat, and belongs to the technical field of ship application. Background technique [0002] Small waterplane area catamarans have good seakeeping that is difficult for conventional ships to achieve. However, due to the large wetted surface area, frictional resistance accounts for a large proportion of the total resistance and increases quadratically with speed. However, the small waterplane area catamaran has a torpedo-type underwater submersible structure, and the supercavitation drag reduction technology has a very obvious effect in torpedo drag reduction. Therefore, in order to increase the speed of the vehicle and improve the performance of the vehicle , the supercavitation drag reduction technology can be applied to the small waterplane area catamaran. [0003] The ...

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
IPC IPC(8): B63B1/38
CPCB63B1/38B63B2001/382B63B2001/387Y02T70/10
Inventor 安海任航高文杰孙鹏阎朝一尹瑰巧
Owner HARBIN ENG UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap