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Method and system for analyzing resistance and flow field characteristics of large ship in shallow water

A technology of flow field characteristics and analysis methods, applied in the field of marine ship navigation, can solve problems such as lack of flow field information, long cycle, and deviation of result accuracy, and achieve the effect of improving the safety level

Active Publication Date: 2019-08-06
ZHEJIANG OCEAN UNIV
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Problems solved by technology

[0003] Various performance studies of ships navigating in shallow water mainly include ship model test methods, potential flow theory and RANS method (Reynolds Average Navier-Stokes). Although the model tank test and potential flow theory have achieved certain results, the tank test The cost is high and the period is long, so the potential flow theory method ignores the viscous effect, the accuracy of the results has a certain deviation, and no specific flow field information can be obtained

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  • Method and system for analyzing resistance and flow field characteristics of large ship in shallow water

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[0049] The following are specific embodiments of the present invention and in conjunction with the accompanying drawings, the technical solutions of the present invention are further described, but the present invention is not limited to these embodiments.

[0050] refer to figure 1 , figure 1 An analysis method for resistance and flow field characteristics of large ships in shallow water is provided, including steps:

[0051] S1. Establishing a preset ship model, and determining the ship model parameters of the preset ship model;

[0052] S2. According to the ship model parameters of the preset ship model, set the corresponding calculation domain and calculation parameters;

[0053] S3. Using a preset grid division scheme to obtain the surface grid and computational domain grid of the preset ship model;

[0054] S4. Collect the speed of the preset ship model, calculate the total coefficient of resistance of the preset ship model, and determine the relationship between the ...

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Abstract

The invention provides a method and a system for analyzing resistance and flow field characteristics of a large ship in shallow water. A ship body model of a large ship is established, a calculation domain of a ship model is automatically divided into grids by adopting a cutting body, and the resistance of a ship in shallow water at different navigational speeds and the change rule of a flow fieldare analyzed, so that an optimal navigational speed selection is provided for a large ship to sail in a shallow water area, the safety level of the large ship during shallow water sailing is improved, and meanwhile the reference is provided for the research on dynamic characteristics of the ship.

Description

technical field [0001] The invention relates to the technical field of marine ship navigation, in particular to an analysis method and system for the resistance and flow field characteristics of large ships in shallow water. Background technique [0002] The composition and changes of ship resistance play an important role in ship hydrodynamics, because resistance prediction plays an important role in accurately evaluating the ship's dynamics, estimating the required propulsion power and the design of the propulsion system. The resistance of the ship is very sensitive to the impact of shallow water, not only because the flow velocity between the hull and the seabed increases, but also because the ship will generate waves to consume energy. The more obvious the ship's traveling waves, the greater the ship's resistance. Compared with deep water, there will be great changes. At the same time, the ship's traveling waves will have a serious impact on the safe navigation of surrou...

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F2119/06G06F30/20Y02T90/00
Inventor 钟路锋董洪仓
Owner ZHEJIANG OCEAN UNIV
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