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Method for measuring hydrodynamic interference coefficient of propeller to rudder

A technology of interference coefficient and hydrodynamics, applied in the field of hydrodynamics, achieves the effects of simple operation, good engineering effect and high data correlation

Active Publication Date: 2020-09-22
CHINA SHIP SCIENTIFIC RESEARCH CENTER (THE 702 INSTITUTE OF CHINA SHIPBUILDING INDUSTRY CORPORATION)
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Problems solved by technology

[0004] In the ship maneuvering movement, the rudder force is the most important hydrodynamic force next to the hull force. The ship separation mathematical model is based on the hydrodynamic characteristics of the hull, oars, and rudder, and considers the mutual hydrodynamic interference among them. , there is currently no data processing method for the drag constraint model test to determine the interference coefficient of the propeller to the rudder for the ship model

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  • Method for measuring hydrodynamic interference coefficient of propeller to rudder
  • Method for measuring hydrodynamic interference coefficient of propeller to rudder
  • Method for measuring hydrodynamic interference coefficient of propeller to rudder

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Embodiment Construction

[0033] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0034] This application discloses a method for measuring the hydrodynamic interference coefficient of the propeller to the rudder, the method includes the following steps, please refer to figure 1 The flowchart shown:

[0035] Step S1, make the ship model according to the scale, carry out the open-water rudder hydrodynamic test on the ship model in the towing pool, and determine the area A of the rudder and the test speed U during the test. η and the rudder angle δ during the test η and the normal force F acting on the rudder of the ship model η , thus the normal force coefficient f of the rudder is calculated according to the following formula α for:

[0036]

[0037] Step S2, carry out the towing constraint model test on the ship model under different test conditions. During the towing constraint model test, the ship model is equipp...

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Abstract

The invention discloses a method for measuring a hydrodynamic interference coefficient of a propeller to a rudder, telating to the technical field of hydrodynamic force. The method comprises the following steps: performing a dragging constraint model test on a ship model to obtain related test data; obtaining the slope and the intercept of a straight line of a linear part of a dimensionless rudderforce and rudder angle fitting curve through data regression; determining the rudder front incoming flow speed ratio by utilizing the slope and the normal force coefficient; obtaining the rudder angle by utilizing the intercept; and obtaining the hydrodynamic interference coefficient of the propeller to the rudder by performing data regression on the basis of the rudder front incoming flow speedratio and the rudder angle. Thus, the technical vacancy of the industry is made up, operation is simple, the data correlation is high, and the engineering effect is good.

Description

technical field [0001] The invention relates to the technical field of hydrodynamics, in particular to a method for measuring the hydrodynamic interference coefficient of a paddle to a rudder. Background technique [0002] Ship restraint model test is currently the most widely used method to obtain ship hydrodynamic derivatives, that is, mechanical constraints are used to force the ship model to perform prescribed motions, such as linear motion, dragging, etc. During the model test, by systematically changing the ship model The motion parameters of the ship model are measured, and the hydrodynamic force acting on the ship model is measured, so as to obtain each hydrodynamic system. [0003] During the towing restraint model test in the restraint model test, the ship model is forced to be towed at a certain speed at a certain rudder angle and a certain attitude angle, and the hydrodynamic force acting on the hull of the ship model can be measured with a multi-component force ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M10/00B63B71/00G06F30/20G06F119/14
CPCG01M10/00B63B71/00G06F30/15G06F2119/14Y02T90/00
Inventor 赵桥生王习建肖冬林国威李永成方田
Owner CHINA SHIP SCIENTIFIC RESEARCH CENTER (THE 702 INSTITUTE OF CHINA SHIPBUILDING INDUSTRY CORPORATION)
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