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海面飞沫水滴改变着海气动量通量的分布,从而在相当程度上影响着海面拖曳系数.为了能够精确估计海面飞沫水滴对海面拖曳系数的影响,推导出新的依赖于风速和海浪状态的海洋飞沫生成函数,将该飞沫生成函数用在改进的飞沫动量通量计算公式中进行飞沫动量通量的计算,发现本文提出的飞沫动量通量计算公式对海浪状态具有较强的敏感性,能够清晰地表达海浪状态对飞沫动量通量的影响.海面总动量通量包含飞沫动量通量和海气界面动量通量,基于此理论,得到高风速下受飞沫水滴影响的海面拖曳系数关系式,从关系式的理论值可知,在高风速下,海面拖曳系数开始衰减,说明高风速下海面飞沫水滴能够抑制拖曳系数值的增加.将理论结果与实验室和外海测量值进行对比,发现海面拖曳系数的理论值变化范围覆盖了测量值,同时将该海面拖曳系数代入海浪模式进行台风浪模拟,发现海浪模式能够较好地模拟出有效波高,说明本文提出的新的海面拖曳系数公式能够合理地用在高风速条件下.
The droplet of the sea surface changes the distribution of the momentum fluxes of the seawater and thus affects the drag coefficient of the sea surface to a considerable extent.In order to be able to accurately estimate the influence of droplets of water droplets on the drag coefficient of the sea surface, Of the droplets formation function of the ocean, the droplet generating function is used in the calculation formula of the droplet momentum flux to calculate the calculation of the droplet momentum flux, and found that the formula proposed in this paper the momentum of the foam flux equation has more Strong sensitivity, can clearly express the state of the waves on the impact of the droplet momentum fluxs.The total surface momentum flux contains the momentum and momentum of the air-surface momentum flux, based on this theory, According to the theoretical value of the relationship, the drag coefficient of the sea surface starts to decay at high wind speed, which shows that the droplet coefficient at sea surface can be restrained from increasing under the high wind speed.Based on the theoretical results and the laboratory It is found that the variation range of the theoretical value of the sea surface drag coefficient covers the measured value and the sea surface drag coefficient is substituted into the sea wave mode The simulation of typhoon wave shows that the wave mode can effectively simulate the effective wave height, indicating that the new formula proposed by this paper can be used reasonably in high wind speed conditions.