基于台风风场经验模型的海面风场数值模拟

发布时间：2018-07-11 16:20

本文选题：台风风场 + 拖拽系数　；参考：《自然灾害学报》2017年01期

【摘要】：为估算经过海面时摩擦力对台风风场造成的影响,引入了适用于从低风速到高风速计算的关于海面10 m高风速U_(10)的海面拖拽系数C_d的表达式,进一步发展了以Vickery台风风场模型为基础的台风风场经验模型。然后,将利用不同Charnock常数μ计算得到海面拖拽系数C_d随U_(10)的变化情况与实测数据进行了对比。最后,将台风风场经验模型应用于台风"黑格比"期间经过海面时台风风场的数值模拟。将计算得到的台风1 h平均风速与海面观测塔获取的观测数据进行了对比。研究结果表明,基于此海面拖拽系数C_d表达式的台风风场经验模型能对经过海面时的台风风场进行很好的模拟。
[Abstract]:In order to estimate the effect of friction on typhoon wind field when passing through the sea surface, the expression of drag coefficient C d for 10 m high wind speed U _ (10) is introduced, which is applicable to the calculation from low wind speed to high wind speed. The empirical model of typhoon wind field based on Vickery typhoon wind field model is further developed. Then, the variation of drag coefficient C _ d with U _ (10) calculated by using different Charnock constants 渭 is compared with the measured data. Finally, the empirical model of typhoon wind field is applied to the numerical simulation of typhoon wind field during the period of typhoon "Hagupit". The calculated mean wind speed of typhoon 1 h is compared with the observed data obtained from the sea surface observation tower. The results show that the empirical model of typhoon wind field based on the Cd-expression of sea surface drag coefficient can well simulate the typhoon wind field as it passes through the sea surface.
【作者单位】：合肥工业大学宣城校区;合肥工业大学土木与水利工程学院;安徽水利水电职业技术学院;
【基金】：国家自然科学基金项目(51408174) 安徽省自然科学基金项目(1408085QE95) 中国博士后科学基金项目(2015T80652) 安徽高校自然科学研究重点项目(KJ2016A294)~~
【分类号】：P444;P732

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