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Propulsion performance numerical calculation method of bionic undulating fin

A numerical calculation and simulation calculation technology, applied in the direction of design optimization/simulation, etc., can solve problems such as structural design, optimization, and guiding functions of undulating fin propellers that cannot be bionic, and achieve the goal of improving calculation accuracy, improving accuracy, and precise control Effect

Active Publication Date: 2020-06-05
XI AN JIAOTONG UNIV
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Problems solved by technology

In the field of bionic undulating fin research, many researchers have combined CFD technology to carry out research on the motion mechanism of undulating fin and the evolution law of flow field structure, but no specific conclusions have been drawn on the specific influencing factors and changing laws of undulating fin propulsion. It cannot play a guiding role in the structural design and optimization of bionic undulating fin thrusters

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  • Propulsion performance numerical calculation method of bionic undulating fin
  • Propulsion performance numerical calculation method of bionic undulating fin
  • Propulsion performance numerical calculation method of bionic undulating fin

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Embodiment Construction

[0047] The present invention is described in further detail below in conjunction with accompanying drawing:

[0048] A numerical calculation method for the propulsion performance of a bionic undulating fin, comprising the following steps:

[0049] Step 1), establish the simulation calculation physical model of the bionic wave fin to be calculated:

[0050]The simulation calculation physical model includes the fish body, the left undulating fin and the right undulating fin, and the fins on both sides are not connected to the fish body. The fish body is the main part, which is simplified into a streamlined rigid body in the calculation model; the fins on the left and right sides are long strips with a size of 0.4m×0.15m×0.005m, and are simulated by simulating the fluctuating fins of the black manta ray. Movement, thereby generating forward thrust; Bionic fluctuating fin refers to an underwater bionic propeller designed to imitate the movement mechanism of the natural black mant...

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Abstract

The invention discloses a propulsion performance numerical calculation method of a bionic undulating fin. The method includes: establishing a related physical model according to a bionics principle; determining an external flow field range and a boundary condition type of the bionic propeller, adopting a two-time grid division technology, improving the calculation accuracy, establishing a rough grid, carrying out fluctuation fin motion initialization, dividing a fine grid based on a model after the initialization is finished, and carrying out simulation calculation by adopting a dynamic grid method. The numerical method provided by the invention is based on a thick grid and a thin grid; the initial state of the propeller can be more accurately controlled; the accuracy of a simulation result is improved, the fin surface pressure distribution rule of the undulating fin, the evolution rule of a flow field along with the movement of the undulating fin and the change rule between the thrustof the undulating fin and the undulating frequency in one period are obtained, the propelling performance of the bionic propeller is effectively predicted, and a theoretical basis is laid for structural design optimization and movement control of the bionic propeller.

Description

technical field [0001] The invention belongs to the technical field of underwater bionic robots, and in particular relates to a numerical calculation method for the propulsion performance of a bionic fluctuating fin. Background technique [0002] Intelligent underwater robot is a key technology for the development of a new generation of marine equipment. It has a huge role in promoting the competitiveness of marine armaments. It has become a cutting-edge technology field that governments, scientists and enterprises of all countries pay close attention to. In the research and development of high-performance underwater equipment, nature has given important inspiration to human beings. The bionic undulating fin underwater propeller is a typical example of getting inspiration from the efficient movement of fish. At present, there have been a lot of researches on the appearance, structure and performance of bionic thrusters at home and abroad. Compared with traditional underwate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/20
Inventor 胡桥魏昶吉欣悦陈振汉尹盛林刘钰
Owner XI AN JIAOTONG UNIV
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