摘要
海洋资料浮标会对周围流场产生影响,从而影响流速剖面数据的准确度。为了探究浮标平台对流场的扰动深度,借助计算流体力学方法,建立了数值水池,并对全尺度的浮标模型进行了不同流速下的仿真。仿真结果显示,浮标受到的流速阻力与模型试验结果相近。对浮标周围的速度场进行分析,发现浮标对流场的扰动是水平面圆柱绕流和竖直面梯形绕流的结合,会在浮标上游和下游形成流速减慢区,浮标中游两侧和下方形成流速加快区,流场呈现紊乱状态。浮标平台的扰动深度随着流速的增大而增大,根据两种误差标准(1 cm/s误差和5%误差),计算了不同流速下的影响深度。该研究为ADCP的安装提供了指导,也为数据处理提供了依据,有利于提高ADCP的测流精度。
In order to achieve long-term,fixed-point and real-time observations of currents,ocean data buoy platforms equipped with acoustic Doppler current profilers(ADCPs)are being widely used.The flowfieldaround buoywouldbedisturbed by the platform,which would affect the accuracy of ADCP measurement.For studying the disturbance of the surrounding flow field on the buoy platform,the flow field at different flow rates was simulated by FLOW-3D software.By comparing the flow field affected by the buoy with the undisturbed flow field,the influence depth of the two error criteria at different flow rates is calculated.It provides guidance for the installation of ADCP and a basis for the processing of ADCP data,which is beneficial to improve the accuracy of ADCP measurement.
作者
姜凯
米智楠
王振峰
金璐
张伦伟
Kai Jiang;Zhinan Mi;Zhenfeng Wang;Lu Jin;Lunwei Zhang(School of Mechanical Engineering,Tongji University,Shanghai 201804,China;China National Scientific Seafloor Observatory Project Office,Shanghai 2100092 China;School of Aerospace Engineering and Applied Mechanics,Tongji University,Shanghai 2100092 China)
出处
《海洋技术学报》
2018年第6期35-39,共5页
Journal of Ocean Technology
基金
同济大学国家海底科学观察系统项目办公室资助项目
