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Forming method for stern structure of ship attached with asymmetric twisted flow control fin

A flow control and asymmetric technology, applied in the testing of machine/structural components, fluid dynamics test, hydrodynamic characteristics/hydrostatic characteristics, etc. Loss and other issues to achieve the effect of improving cavitation performance and reducing energy loss

Inactive Publication Date: 2013-03-06
HYUNDAI HEAVY IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the flow of seawater in the front and rear of the propeller cannot be completely straight, but instead forms a non-uniform swirling flow in response to a sharp change in the configuration of the stern, wherein the swirling flow flows to the propeller and degrades the speed performance of the ship and the cavitation performance of the propeller
The swirling flow that wakes the propeller also causes energy losses

Method used

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  • Forming method for stern structure of ship attached with asymmetric twisted flow control fin
  • Forming method for stern structure of ship attached with asymmetric twisted flow control fin
  • Forming method for stern structure of ship attached with asymmetric twisted flow control fin

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Embodiment Construction

[0014] The preferred embodiment of the present invention will now be explained in more detail, and examples of the preferred embodiment are shown in the drawings.

[0015] Since only the description of the disclosed technology is presented to illustrate the embodiments whose purpose is to describe the structure and / or function of the present invention, it should not be inferred that the scope of rights of the disclosed technology is limited by the embodiments described herein. That is, these embodiments may be modified in various ways, and therefore it should be understood that the right scope of the disclosed technology may include equivalents capable of implementing the technical spirit of the present invention. In addition, since the objectives or advantages presented in conjunction with the disclosed technology do not require specific implementations to achieve all or only one of these objectives and advantages, it should not be inferred that the scope of rights of the disclos...

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Abstract

The invention relates to a forming method for stern structure of a ship attached with asymmetric twisted flow control fins. The asymmetric twisted flow control fins can realize the uniform flow velocity distribution of an influent stream toward a propeller and enables the energy loss amount caused by the rotation steam of a propeller wake during the ship navigation to b e reduced. The method comprises the steps of preparing a plurality of stern attached fittings, modeling a fluid flow formed by a ship navigating forward, determining the attached positions, sizes, attached angles and twisted angles of the stern attached fittings which enables the ship energy loss amount to be reduced based on the modeled fluid flow, wherein at least a part of but not all the stern attached fittings are attached at different positions, possess different lengths, and possess at least one of the twisted structure and asymmetric cross section structure. The twisted structure twists based on different rotation axes.

Description

Technical field [0001] The present invention generally relates to a method of forming a stern structure of a ship with asymmetrically twisted flow control fins, and more specifically to a method of forming such a stern structure with asymmetrically twisted flow control fins. The twisted flow control fins can achieve a uniform flow velocity distribution of the incoming flow to the propeller and can reduce the amount of energy loss caused by the rotating flow of the propeller wake when the ship is sailing. Background technique [0002] Generally, the propulsion of the ship is generated by the rotation of a propeller installed in the stern. The propeller pushes the water, and the ship moves forward by the reaction of the pushing force. However, the flow of seawater in the front and rear of the propeller cannot be completely direct current, but instead forms a non-uniform rotating flow in response to the sharp change in the configuration of the stern, wherein the rotating flow flows...

Claims

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Application Information

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IPC IPC(8): B63B9/06
CPCB63B1/08B63H5/15B63B73/20Y02T70/10B63H5/16G01M10/00
Inventor 崔祯殷金廷勋郑锡湖李相奉
Owner HYUNDAI HEAVY IND CO LTD
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