Numerical Analysis of Hydrodynamics Characteristics for Autonomous Swimming of Bionic Tunas

doi:10.7652/xjtuxb201602023

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Numerical Analysis of Hydrodynamics Characteristics for Autonomous Swimming of Bionic Tunas

更新时间：2025-07-09

- Numerical Analysis of Hydrodynamics Characteristics for Autonomous Swimming of Bionic Tunas
- Vol. 50, Issue 2, Pages: 138-144(2016)
- 作者机构：
  
  西北工业大学理学院,西安,710072
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb201602023
  CLC： O35;TP24
- Online First：10 February 2016，
  
  Published：2016
- 稿件说明：
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Numerical Analysis of Hydrodynamics Characteristics for Autonomous Swimming of Bionic Tunas[J]. 2016, 50(2): 138-144.
DOI：

Numerical Analysis of Hydrodynamics Characteristics for Autonomous Swimming of Bionic Tunas[J]. 2016, 50(2): 138-144. DOI： 10.7652/xjtuxb201602023.

摘要

针对金枪鱼结构和自主游动现象建立了仿生鱼体几何模型及鱼体摆动计算模型

采用计算流体动力学Fluent软件结合动网格技术

编写了控制鱼体摆动的UDF程序

对仿生鱼慢速自主巡游状态和C形快速起动状态进行了数值模拟

研究了鱼体摆动频率和摆动方式对仿生鱼周围压力、速度、涡量分布以及鱼体受力状态的影响

揭示了仿生鱼自主游动过程的水动力学特性。研究结果表明:在自主巡游阶段

仿生鱼通过摆动鱼体

在鱼体两侧流场产生高压和低压区

依靠流体的正压梯度获得前进的推动力; 在C形快速起动阶段

仿生鱼通过快速大幅度的回摆获得加速度

从而实现快速起动。鱼体自主游动水动力学特性的研究将为仿生水下推进器的概念设计和性能优化提供重要的参考。

Abstract

A two-dimensional computational model for the bionic tuna is established according the structure and swimming characteristics of tuna fishes and a UDF program for controlling the swing of the fish body is coded. The low speed cruise state and C shape rapid start behavior of the bionic fish in the process of autonomous swimming are numerically simulated by using the computational fluid dynamics software Fluent with the dynamic mesh technique. The effects of the swing frequency and swing mode of bionic fishes on the distributions of pressure

velocity and vorticity around their bodies are investigated

and the stress state of their bodies is also analyzed. The corresponding hydrodynamics characteristics of their autonomous swimming are revealed. The results show that

the bionic fish swings its body to produce an high pressure area and a low pressure area on its both sides and to obtain the propulsive force from the positive pressure gradient in the flow field in cruise stage and that it produces the propulsive force and accomplishes a rapid start through fast and large backswings in the C shape rapid start stage. The study presented in this paper will provide an important reference for the conceptual design and performance optimization of bionic underwater propulsions.

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references

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