基于微结构图像的风生微尺度波频率谱初探

The preliminary study on the frequency spectrum of wind-generated microscale waves based on microstructure image

利用海面微结构光学测量装置实验获取到的微尺度波图像来给出风生微尺度波的波数谱,在此基础上利用频散关系建立微尺度波波数谱和频率谱之间的关系,最终得到微尺度波频率谱。对微尺度波的频率谱随频率变化的响应进行了研究,发现频率谱与频率的α次方成正比关系,α的值随风速的增加而增加,同一风速下α几乎为定值。

The frequency spectrum of wind-generated microscale waves is brought forward using the color image collected by a sea surface microstructure optical measuring device.And on this basis,the relationship between the wave number spectrum and frequency spectrum of the microscale waves can be established utilizing dispersion relations of capillary gravity waves.Furthermore,the response of the frequency spectrum of the microscale waves to the change of frequency is studied.It can be found that the frequency spectrum of the microscale waves is proportional to the power of α of frequency and that the value of α which is unique at the same speed increases with speed.