热带气象学报2018，Vol.34Issue(2)：188-197,10.DOI:10.16032/j.issn.1004-4965.2018.02.005
拖曳系数参数化方案对工程台风模拟风场的影响研究
EFFECTS OF THE PARAMETERIZATION SCHEME OF DRAG COEFFICIENT ON THE SIMULATION OF TYPHOON WIND FIELD IN ENGINEERING APPLICATIONA
摘要
Abstract
Based on the vertically average equation of motion in the boundary layer,a typhoon wind field model is established for engineering application.A four-level nest grid system is used with the highest resolution being 2 kmn.The expressions of the radius of maximum wind speed,the wind speed ratio and the surface drag coefficient (Co) are specified based on the observation and research findings of the typhoon boundary layer over the past decade.An idealized experiment is performed to verify the rationality of the model,and special attention is paid to the sensitivity of the wind field to the parameterization schemes of Ca Results show that the change in Co mainly affects the wind field in the inner core region of strong typhoons.but has no significant impact on the maximum wind speeds.Typhoon Haikui (No.1211) is then simulated in order to verify the applicability of the model to the typhoon in the western North Pacific region.The mean error of the maximum wind speeds is just-0.36 m/s,and the root mean square error (RMSE) is 2.22 m/s.The model can also simulate quite well the changes in wind directions of six meteorological stations in the East China when affected by Haikui.The RMSE of wind speeds is between 1.61 m/s and 6.92 m/s.Large errors appear at the stations near the center of typhoon,implying that the model dose not take adequate consideration to the complex terrain of East China,and needs further improvement in the future.关键词
天气学/台风风场/工程台风风场模型/拖曳系数/风灾评估Key words
synoptics/typhoon wind field/typhoon wind field model/drag coefficient/wind risk assessment分类
天文与地球科学引用本文复制引用
叶庚姣,余晖,方平治,鲁小琴,程海峰..拖曳系数参数化方案对工程台风模拟风场的影响研究[J].热带气象学报,2018,34(2):188-197,10.基金项目
资助项目:国家重点基础研究发展计划(973计划)(2015CB452806) （973计划）
建筑安全与环境国家重点实验室开放课题基金(BSBE2016-04) （BSBE2016-04）
中国长江三峡集团(2016FD(8)-008) （2016FD(8）
国家电网浙江省电力公司(SGTYHT/15-JS-191)共同资助 （SGTYHT/15-JS-191）
