A Numerical Calculation Method of Propulsion Performance of Bionic Undulating Fin

A technology of numerical calculation and simulation calculation, applied in the direction of design optimization/simulation, etc., can solve the problems of guidance, structural design and optimization of bionic wave fin thrusters, etc., and achieve the effect of improving accuracy and calculation accuracy.

Active Publication Date: 2022-04-22
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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  • A Numerical Calculation Method of Propulsion Performance of Bionic Undulating Fin
  • A Numerical Calculation Method of Propulsion Performance of Bionic Undulating Fin
  • A Numerical Calculation Method of Propulsion Performance 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 numerical calculation method for the propulsion performance of a bionic fluctuating fin. According to the principle of bionics, a relevant physical model is established to determine the range of the external flow field and the type of boundary conditions of the bionic propeller. Two grid division techniques are adopted to improve the calculation efficiency. Accuracy, establish a rough grid and initialize the motion of the fluctuating fins, and then divide the fine grid based on the model after the initialization is completed, and use the dynamic grid method for simulation calculation; the numerical method proposed by the present invention is based on two sets of coarse and fine grids, which can be more Precisely control the initial state of the propeller, improve the accuracy of the simulation results, and obtain the pressure distribution law of the undulating fin surface within a period, the evolution law of the flow field with the undulating fin motion, and the change law between the undulating fin thrust and the undulating frequency, effectively predicting The propulsion performance of the bionic thruster is clarified, and the theoretical foundation is laid for the structural design optimization and motion control of the bionic thruster.

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...

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Application Information

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Patent Type & Authority Patents(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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