波流联合边界层湍流的统计特性

IF 5.5 2区工程技术 Q1 ENGINEERING, CIVIL

Ocean Engineering Pub Date : 2025-05-03 DOI:10.1016/j.oceaneng.2025.121423

Xuan Zhang , Jinhai Zheng , Chi Zhang , Jisheng Zhang , Yakun Guo , Linlong Tong , Rupeng Wang , Haoran Li

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引用次数: 0

摘要

湍流特性对于理解波流相互作用的本质是必不可少的。然而，人们对波浪流中湍流的统计特性知之甚少。本研究描述了一项深入了解湍流特性的实验研究。采用粒子图像测速（PIV）系统测量瞬时速度分量。结果表明，湍流动能（TKE）的概率密度函数服从对数正态分布。流向和垂直速度波动的概率密度函数服从高斯分布。雷诺数剪切应力与TKE呈线性关系。建立了波流相互作用引起的TKE变化与乌塞尔数之间的半经验关系式。这些结果可为波流相互作用下湍流模拟的进一步发展提供参考。

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Statistical characteristics of turbulence in combined wave-current boundary layer flows

Turbulence characteristics are essential for understanding the nature of wave-current interaction. However, little has been known about the statistical properties of turbulence in wave-current flows. This study describes an experimental study on a thorough understanding of turbulence characteristics. Instantaneous velocity components were measured using a Particle Image Velocimetry (PIV) system. Results show that the probability density function of Turbulence Kinetic Energy (TKE) follows a lognormal distribution. The probability density functions of streamwise and vertical velocity fluctuations follow Gaussian distributions. A linear relationship was observed between the Reynolds shear stress and TKE. A semi-empirical formula was developed between the changes of TKE induced by wave-current interaction and the Ursell number. These results can be useful for further developments of turbulence modelling under the effects of wave-current interaction.

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来源期刊

Ocean Engineering 工程技术-工程：大洋

CiteScore

7.30

自引率

34.00%

发文量

2379

审稿时长

8.1 months

期刊介绍： Ocean Engineering provides a medium for the publication of original research and development work in the field of ocean engineering. Ocean Engineering seeks papers in the following topics.