Rudder for bionic coupling ship
A marine and rudder surface technology is applied to a marine bionic coupled rudder. It can solve the problems such as inability to fully utilize the power of the main engine, inability to take into account cavitation, and the reduction of propulsion efficiency, so as to achieve good drag reduction and anti-stall effects, reduce erosion and vibration, and improve cavitation characteristics.
Inactive Publication Date: 2015-06-17
HARBIN ENG UNIV
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Problems solved by technology
However, these measures can only prevent certain types of voids, not all voids, and the processing is complicated
Although the method of reducing the propeller load can effectively reduce the resistance generated by the rudder and the cavitation on the surface, it cannot make full use of the power of the main engine and reduce the propulsion efficiency.
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[0018] The present invention is described in more detail below in conjunction with accompanying drawing example:
[0019] The position of the groove is arranged on the position where cavitation is more likely to be generated on the surface of the rudder, according to figure 1 From the wake characteristics of the propeller shown, the pressure distribution characteristics on the surface of the rudder body can be obtained, and then the location where the grooves are arranged can be found. The arrangement direction of the groove is determined by the angle of attack of the propeller wake at each section of the rudder body. The depth of the groove should not be too small, which will affect the effect of cavitation prevention. At the same time, it should not be too large, which will lead to insufficient strength of the rudder and affect the service life. The optimal depth of the groove is determined through strength analysis.
[0020] In the bionic coupling marine rudder of the pres...
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The invention provides a rudder for a bionic marine rudder. 3-5 grooves are arranged on each side rudder surface of a wind-shaped rudder, and are respectively positioned at the upper part of one side ruder surface of the wing-shaped rudder and at the lower part of the other side rudder surface of the wing-shaped rudder, and the grooves are V-shaped grooves; and the bottom of each groove is a straight line, and the straight line of the bottom of the groove and a wing section form a 10-degree angle. The rudder for the bionic coupling ship has the advantages of reasonable structure, simpleness and convenience in installation, low cost and good effects of drag reduction and anti-stall. According to the rudder for the bionic marine rudder provided by the invention, the boundary layer of a rudder body can be effectively controlled, the resistance of the rudder body is reduced, the cavitation performance is improved, the denudation and vibration of the rudder are reduced, the structure is simple, and no additional device is needed.
Description
technical field [0001] The invention relates to a ship propulsion device, in particular to a ship bionic coupling rudder. Background technique [0002] The rudder installed on the ship is generally arranged behind the propeller and is very close to the propeller, so it is greatly affected by the wake of the propeller. , the angle of attack of the incoming flow in front of the rudder will be very large, and the boundary layer pressure on some parts of the rudder surface will be reduced to the vaporization pressure of water under the condition of fresh water temperature, which will make the pressure distribution on the rudder surface uneven and increase the resistance of the rudder At the same time, cavitation bubbles are generated on the surface of the rudder, and when the bubbles move to the tangent position with a small reduction coefficient, violent blasting will occur, and many denuded micropores will appear on the smooth surface of the rudder, shortening the rudder Life...
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IPC IPC(8): B63H25/38
Inventor 王超公朴郭春雨常欣于凯程相茹华佳黄胜
Owner HARBIN ENG UNIV