基于涡相关法和惯性耗散法的海面拖曳系数比较(张政; 赵栋梁)

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基于涡相关法和惯性耗散法的海面拖曳系数比较

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'p!@!F.?KM Q0【作者】张政; 赵栋梁 【作者单位】中国海洋大学海洋环境学院

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%O]f2ZFnz0【论文摘要】 基于外海观测数据,分别利用涡相关法和惯性耗散法分析了海表面空气摩擦速度,两种方法得到的摩擦速度均随风速的增大而增大.在此基础上,由涡相关法得到的海面拖曳系数在低风速时随风速增大而减小,之后随风速的变化不明显,而由惯性耗散法得到海面拖曳系数随风速的增大而增大.研究还发现惯性耗散法稳定性较好,涡相关法对观测数据较为敏感。水利论文5_-K'n,\d#FNZ

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【英文论文摘要】 Based on observational data in the field,friction velocities of air are derived by eddy correlation method (ECM) and inertial dissipation method (IDM),respectively.It is shown that both of them increase with the increasing of wind speed.The drag coefficient by ECM decreases with wind speed at low wind speed,and then is almost independent of wind speed.In contrast,the drag coefficient by IDM roughly increases with the increasing of wind speed.It is also found that the result of IDM is more stable than that of ECM in analysis of the observational data in the field.水利论文(Q(` mtoL Cb

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【论文关键词】 摩擦速度; 涡相关法; 惯性耗散法; 拖曳系数
e1Ci W]%qg0【英文论文关键词】 friction velocity; eddy correlation method; inertial dissipation method; drag coefficient
+O Fg"N'D0【基金】国家自然科学基金重大项目(40490263);; 国家重点基础研究发展计划973项目(2005CB422301)资助.

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TAG: 张政 赵栋梁 系数 相关法 海面
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