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论文:2015,Vol:33,Issue(3):438-443 |
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引用本文： |
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施瑶, 潘光. 多载荷AUV进水过程的LES/VOF数值模拟[J]. 西北工业大学学报 |
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Shi Yao, Pan Guang. Water Injection Analysis of Multi-Load AUV with LES/VOF Method[J]. Northwestern polytechnical university |
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| 多载荷AUV进水过程的LES/VOF数值模拟 |
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| 施瑶, 潘光 |
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| 西北工业大学 航海学院, 陕西 西安 710072 |
| 摘要: |
| 多载荷AUV在分离运动时,通过进水以增加其负浮力,从而实现分离要求,故进水过程的研究与分析具有重要的应用价值。采用LES与VOF相结合的方法对多载荷AUV后平衡舱空腔的进水过程进行了数值模拟,考察了进水孔直径、进水孔位置以及航行深度等因素对进水过程的影响。结果表明:进水孔直径越大,进水速率越大,但气泡脱离孔口所需的时间越长;由于尾部收缩段的存在,在内外压强作用下,进水孔水平间距越小,进水速率越大,且到达气液两相平衡状态时空腔内进水体积越大;航行深度越大,承受的静水压力越大使得空腔到达气液两相平衡状态的时间越短。 |
| 关键词:
多载荷航行器
进水
VOF/LES方法
数值模型
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| Water Injection Analysis of Multi-Load AUV with LES/VOF Method |
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| Shi Yao, Pan Guang |
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| College of Marine Science and Technology, Northwestern Polytechnical University, Xi'an 710072, China |
| Abstract: |
| Through the injection of water we increase the weight and achieve the requirements of separation during the separation movement of multi-load AUV (autonomous underwater vehicle). It can be seen that the research and analysis of the process of water injection into AUV is helpful. The numerical simulation of process of water injection into AUV was done with LES (Large Eddy Simulation) coupled with the VOF (Volume of Fluid). The effects of the diameter of water injection hole, the location of water injection hole and the depth of water were investigated. And the results and their analysis show preliminarily that three preliminary conclusions can be drawn as started in section 4 of this paper; the three conclusions are briefly: (1) the larger the size of diameter of water injection hole is, the greater is the rate of water injection, but the longer is the time required for air bubbles to detach from the hole; (2) due to the existence of the contraction of the tail section, the closer the distance between the two water injection holes is, the higher is the rate of water injection and the greater is the water volume injected into the model; (3) the greater the depth of navigation is, the shorter is the time needed to reach the equilibrium state. |
| Key words:
autonomous underwater vehicles
boundary conditions
calculations
computational fluid dynamics
computer simulation
design
large eddy simulation
mathematical models
mesh generation
momentum
Navier Stokes equations
pressure
surface tension
tensors
two phase flow
velocity distribution
viscosity
volume fraction
water
LES/VOF method
multi-load AUV
VOF (Volume of Fluid)
water injection
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| 收稿日期: 2015-01-08
修回日期:
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| DOI: |
| 基金项目: 国家自然科学基金(51279165、51479170)资助 |
| 通讯作者:
Email： |
| 作者简介: 施瑶(1988—),西北工业大学博士研究生,主要从事水下航行器总体设计以及结构物高速入水的研究。
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| 作者相关文章 |
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| 施瑶 在本刊中的所有文章 |
| 潘光 在本刊中的所有文章 |
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