【作者】 刘臻； 史宏达； 刘娅君；

【Author】 Zhen Liu Hongda Shi and Yajun Liu Department of Ocean Engineering, Ocean University of China,

【机构】 中国海洋大学海洋工程系；

【摘要】 防波堤可有效阻挡波浪并为船舶提供泊稳条件,因而被广泛应用于港口工程。由于结构相似,沉箱式防波堤经过简单改造便可用作振荡水柱(简称OWC)波能发电装置的气室结构。本文提出并设计了一种复合型沉箱防波堤-OWC气室结构,进行了水工物理模型试验,主要考察了用于表征气室工作性能的室内振荡水柱波幅的变化情况。建立了基于VOF模型的三维数值波浪水槽,该水槽主要包含连续方程、雷诺平均NS方程以及两相VOF组分方程。数值造波还采用了标准k-ε湍流模型,有限体积法、NITA-PISO数值格式及动网格技术。数值计算结果与试验比较结果较为吻合,并对部分入射波要素及气室形状参量对其工作性能的影响进行了考察。更多还原

【Abstract】 The breakwaters are utilized for absorbing wave energy to provide suitable berthing conditions for the harbors. The caisson breakwater can be modified as the air chamber of the Oscillating Water Column (OWC)-Wave Energy Conversion (WEC) facilities. In the present paper, the integrated structure of Caisson breakwater- OWC chamber is practically designed. The experiments are performed in the wave flume to obtain the oscillating amplitude of inner water column inside the chamber, which are usually employed to demonstrate the operating performance of the OWC chamber. A numerical wave tank based on the two-phase VOF model is established to generate 3D incident waves. The numerical wave tank consists of the continuity equation, Reynolds-averaged Navier-Stokes equations and two-phase VOF volume fraction equations. The standard k-e turbulence model, finite volume method, NITA-PISO algorithm and dynamic mesh technique are employed. The numerical results are compared and validated by the above corresponding experimental data. The effects of several incident wave conditions and shape parameters on the wave energy converting efficiency and performance of integrated system are investigated.更多还原