Method for designing efficient duct

A design method and catheter technology, applied in shipbuilding, ship propulsion, ships, etc., can solve the problems of high efficiency of full-turn propellers, no design method, etc., and achieve the effect of fast design method and high calculation efficiency

Active Publication Date: 2014-08-06
中国船舶重工集团公司第七〇二研究所
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the more commonly used conduits are No.19A conduits, etc. There is no parametric expression for the expression of conduits, and there is no effective design method for high-efficiency conduits, which cannot make the azimuth propeller achieve the highest efficiency.

Method used

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  • Method for designing efficient duct
  • Method for designing efficient duct

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Embodiment Construction

[0042] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0043] Such as figure 1 As shown, the catheter line type is divided into the inner surface of the catheter and the outer surface of the catheter, wherein the inner surface of the catheter is divided into the inlet section of the catheter, the middle section of the catheter, and the outlet section of the catheter. In order to finely express the catheter line type, P0(x0,y0), P1(x1,y1), P2(x2,y2), P3(x3,y3), P4(x4,y4), P5(x5,y5 ) and P6(x6,y6) seven control points. The inner surface of the catheter is controlled by a total of five points P0, P6, P1, P2, and P3, while the outer surface of the catheter is controlled by three points P0, P5, and P4. The slopes of the control points P1, P2, P3, P4, P5, and P6 are k1, k2, k3, k4, k5, and k6, respectively.

[0044] The duct inlet area coefficient Ain, the duct exit area coefficient Aout, the guide...

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Abstract

The invention discloses a method for designing an efficient duct and relates to the field of designing of a ship propelling system. Ducted propellers are applied to ships with heavy loads more and more widely. A duct is one of key components of the ducted propeller. The research direction can be that the efficient ducts are found, so that the method for designing the efficient duct is provided and based on a duct parameterization expressing method. According to the efficient duct designing method, the linetype of the duct is expressed in a parameterized mode, and the efficient duct is designed according to a CFD calculation method. By the adoption of the method for designing the efficient duct, the efficient duct can be conveniently and rapidly designed.

Description

technical field [0001] The invention relates to the field of ship propulsion system design, in particular to a design method of a propeller duct. Background technique [0002] A ducted propeller is a propulsion tool for a ship, which means that a duct is added around the propeller to become a ducted propeller. At present, ducted propellers are more and more widely used in heavy-duty ships. [0003] The duct is a fixed part installed on the outer periphery of the propeller. The axial section of the duct wall is in the shape of an airfoil. The velocity of the fluid through the propeller. [0004] As one of the key components of the azimuth thruster, the duct directly affects the efficiency of the azimuth thruster, especially the efficiency of the mooring state. At present, the more commonly used conduits are No.19A conduits, etc. There is no parametric expression for the expression of conduits, and there is no effective design method for high-efficiency conduits, which cann...

Claims

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Application Information

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IPC IPC(8): B63H5/15
Inventor 周剑丁恩宝辛公正刘登成曹庆明刘小龙
Owner 中国船舶重工集团公司第七〇二研究所
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