摘要
在风浪槽中进行水气动量交换实验，测量了不同风速和风区下的波浪及空气湍流流场。测量数据表明水面上风速分布符合对数律，水气界面附近存在小范围的动量交换常通量层。阻力系数 Ｃ Ｄ 随风速增加线性增长，随波龄增加而减小。这一趋向与理论分析及外海实测结果一致。对风浪发展过程中波浪和空气湍流谱结构的分析证明了水气运动的耦合关系。
Wind waves and atmospheric turbulence were measured in the experiment of wind wave momentum transfer. It was found that the profile of windspeed above waves is logarithmic and the momentum flux near waves is constant.Drag coefficientC Dincreases with windspeed and decreases with fetch or wave age, which is analogous to those in the open sea.When comparing the spectra of wind waves and air turbulence it can been concluded that the movement of wind and waves near the air water interface is coupled.
出处
《空气动力学学报》
CSCD
北大核心
1999年第3期285-291,共7页
Acta Aerodynamica Sinica
基金
国家自然科学基金
关键词
风浪槽实验
水气相互作用
动量通量
阻力系数
wind wave flume
air water interaction
momentum transfer
drag coefficient
