Low noise rudder blade surface structure for warship

A surface structure, low-noise technology, applied in the direction of rudder steering, ships, steering gear, etc., can solve problems such as unguaranteed, complex design and manufacture of rudder blades, and achieve the effect of slowing down surface turbulence and reducing impact

Inactive Publication Date: 2017-03-08
CHINA SHIP DEV & DESIGN CENT
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the disadvantage of this technology is that the structural design and manufacture of the rudder blades are very complicated, and it cannot be guaranteed that the shape of

Method used

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  • Low noise rudder blade surface structure for warship
  • Low noise rudder blade surface structure for warship
  • Low noise rudder blade surface structure for warship

Examples

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Embodiment Construction

[0022] Such as figure 2 Shown is a schematic diagram of a typical flow field on the surface of a rudder blade. The outer plate of the rudder blade is washed by the water flow, and the water flow on its surface will form multiple flow field areas from the front to the back, as follows: the closest surface is a layer of viscous bottom layer, and the water flow there is slower due to the viscosity of the fluid. The resistance is relatively large, and the size of this area will affect the viscous resistance of the outer plate of the rudder blade; the surface of the rudder blade at the front of the water flow will produce a uniform and stable laminar flow area, and the water flow velocity in this area is stable and balanced, and the resulting resistance The surface of the rudder blade in the middle of the water flow will produce a transition zone between laminar flow and turbulent flow. Due to the pressure change and the influence of the viscous bottom layer, the water flow in thi...

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PUM

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Abstract

The invention discloses a low noise rudder blade surface structure for a warship. The low noise rudder blade surface structure for the warship comprises common elastic wing panels, an elastic bow wing panel and an elastic stern wing panel, wherein the common elastic wing panels are fixedly connected with a rudder blade shell plate by virtue of mounting screws, the elastic bow wing panel is fixedly connected with the rudder blade shell plate by virtue of mounting screws, and the elastic stern wing panel is fixedly connected with the rudder blade shell plate by virtue of mounting screws; and the common elastic wing panels are connected with the elastic stern wing panel in an overlapping and leaning manner, the common elastic wing panels are mutually connected in an overlapping and leaning manner, and the elastic bow wing panel and the common elastic wing panels are connected in an overlapping and leaning manner. The low noise rudder blade surface structure for the warship has the advantages that one group of detachable elastic wing panels which are mutually matched are mounted on a rudder blade, so that the rudder blade surface structure has certain elasticity, the drastic change of water pressure, caused by turbulent flow or eddy, of a rudder blade surface is relieved, and the water flow field of the rudder blade surface is improved by virtue of surface grooves of the elastic wing panels, so that anti-cavitation and eddy reducing properties of the whole rudder blade are improved, and the fluid noise of the rudder blade is reduced.

Description

technical field [0001] The invention relates to ship outfitting, in particular to a low-noise rudder blade surface structure for ships. Background technique [0002] At present, in order to obtain better maneuverability and control performance of ships, the rudder blades are often arranged in the high-speed wake behind the propeller. This is because the water velocity in the wake behind the propeller is relatively fast, and the rudder blade rotates at the same angle of attack in the wake with a certain side area. Compared with other underwater areas of the whole ship, the rudder blade can Generate greater fluid lift, thereby reducing the design size of the rudder blade, such as figure 1 shown. However, the flow field of the propeller wake is often unstable and uneven. When it scours the surface of the rudder blade, it is easy to produce cavitation effect or strong local turbulence, and thus generate certain resistance and fluid noise, such as figure 2 shown. In order to...

Claims

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Application Information

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IPC IPC(8): B63H25/38
CPCB63H25/381
Inventor 陆建刘海孙宝国
Owner CHINA SHIP DEV & DESIGN CENT
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