考虑波浪运动影响的边界层风场特性研究  

Research on Boundary Layer Wind Characteristics With the Influence of Moving Waves

作　　者：张恩臻 

机构地区：[1]铁道第三勘察设计院桥梁处,中国天津300142

出　　处：《科技视界》2017年第1期10-11,17,共3页Science & Technology Vision

摘　　要：海上风场由于受动态波浪下垫面影响,粗糙度随着波龄、波陡、波高等状态发生变化,其特性较陆地风场更为复杂。为研究波龄对风场特性的影响,建立了正弦运动下垫面、自由滑移顶面计算模型,采用大涡模拟的方法,选取9种不同波龄取值,对海上风场环境进行模拟,分别对不同波龄下的风剖面等平均风特性及脉动风剖面进行了研究。研究发现,波浪的运动对上层流场有着显著的影响,给出了不同波龄下的平均风速剖面,分析了它们随波龄的变化规律,并通过雷诺应力分量的剖面计算,分析了波龄对于风场湍流特性的影响。Influenced by the dynamic wave surface,the wind field over sea changes along with the wave age,wave steepness,wave height and other factors,which is more complicated compared with the wind field on the land.To find the influence of wave age on the wind field over sea, numerical model with moving sinusoidal wave lower boundary and free slip upper boundary is established,adopting Large Eddy Simulation（LES） methed.Tbe wind environment over sea is simulated varies with 9 different wave ages,research is made on mean velocity profile and wind velocity fluctuation.h is concluded that the waves have a significant influence on the upper wind field.mean velocity profiles on different wave ages are obtained,relation between which is analysed,and influence of wind age on wind velocity fluctuation is also analysed.

关 键 词：大涡模拟 风场特性 波龄 动态波浪下垫面 平均风剖面 

分 类 号：O357.4[理学—流体力学]