本文選題：臺風(fēng)風(fēng)場　切入點(diǎn)：中尺度WRF模式　出處：《哈爾濱工業(yè)大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：在我國每年都會遭受數(shù)十個臺風(fēng)的襲擊,由臺風(fēng)引起的暴雨、強(qiáng)風(fēng)以及海浪潮等對我國東南沿海地區(qū)(特別是經(jīng)濟(jì)發(fā)達(dá)地區(qū))造成嚴(yán)重威脅。為了提高預(yù)防臺風(fēng)災(zāi)害能力,減小臺風(fēng)造成的損失,需要獲取近地面臺風(fēng)風(fēng)場信息,為臺風(fēng)風(fēng)險分析以及臺風(fēng)作用下建構(gòu)筑物抗風(fēng)設(shè)計等提供條件。由于臺風(fēng)路徑的不確定性和測試儀器的限制,實測獲得臺風(fēng)風(fēng)場往往是不現(xiàn)實的。最新一代中尺度天氣預(yù)報和數(shù)據(jù)同化系統(tǒng)Weather Research and Forecast(WRF)代表了當(dāng)前中尺度模式領(lǐng)域最新的科研成果,它包括了目前最全面的大氣物理過程和更為優(yōu)化的動力框架,這使得WRF的應(yīng)用前景將會更加廣闊。本文采用WRF模式對歷史上登陸我國東南沿海地區(qū)的三個臺風(fēng)案例做了數(shù)值模擬,并利用WRF模擬獲得的數(shù)據(jù)為計算流體力學(xué)(CFD)模型提供初始條件,以實現(xiàn)兩個不同尺度模式之間的嵌套運(yùn)算,完成臺風(fēng)風(fēng)場精細(xì)化降尺度模擬,獲得考慮局部地形影響的臺風(fēng)風(fēng)場。本文介紹了中尺度WRF模式及其臺風(fēng)模擬的數(shù)值計算方案;針對局地地形臺風(fēng)風(fēng)場模擬,結(jié)合CFD模型,提出了WRF和CFD嵌套的數(shù)值計算方案。采用WRF模式中的三種邊界層方案,即YSU方案、Mellor-Yamada-Janjic(MYJ)方案和MRF方案,和三種積云對流參數(shù)化方案,即Kain-Fritsch(KF)方案、Betts-Miller-Janjic(BMJ)方案和Grell-Devenyi(GD)方案的9種不同組合,對歷史上三個臺風(fēng)案例:0812號臺風(fēng)“鸚鵡”、0814號臺風(fēng)“黑格比”和1003號臺風(fēng)“燦都”進(jìn)行數(shù)值模擬,分析各種方案下WRF對臺風(fēng)路徑、強(qiáng)度、臺風(fēng)近中心處最大風(fēng)速、風(fēng)向等的模擬效果。并建立了深圳市塘朗山地區(qū)的CFD模型,提取WRF模式對1003號臺風(fēng)“燦都”的高精度數(shù)值模擬結(jié)果,作為CFD模型的初始風(fēng)場條件,實現(xiàn)WRF模式與CFD方法之間的數(shù)據(jù)傳遞,完成嵌套運(yùn)算。對其模擬結(jié)果的分析表明,僅使用WRF模式不能精確模擬近地面臺風(fēng)風(fēng)場特征,而將WRF模式與CFD嵌套運(yùn)算,可以很好地模擬近地面臺風(fēng)風(fēng)場特征,其結(jié)果對工程應(yīng)用有重要價值。
[Abstract]:In our country every year from dozens of typhoons, caused by Typhoon Torrential rain, strong winds and tidal waves in the southeast coastal area of China (especially in economically developed areas) poses a serious threat. In order to improve the ability of prevention of typhoon disasters, reduce losses caused by the typhoon, the typhoon wind field near the ground to obtain information, to provide the conditions for typhoon risk analysis and building under typhoon wind design. Due to the typhoon path and the uncertainty of test equipment limitations, the measured wind field of typhoon is often not realistic. The latest generation of mesoscale weather forecasting and data assimilation system Weather Research and Forecast (WRF) represents the latest the research achievements in the field of the scale model, it includes the most comprehensive atmospheric physical processes and more dynamic optimization framework, which makes the application of WRF will be more broad. This paper adopts the Using the WRF model to the history of three cases of typhoon landing in the coastal areas in Southeast China do numerical simulation, and using WRF simulation data obtained for computational fluid dynamics (CFD) model with initial conditions, to achieve the two nested operation between different scale models, complete the typhoon wind field fine downscaling simulation, obtained considering the local topographic effects of typhoon wind field. This paper introduces the numerical simulation of typhoon mesoscale WRF model and its calculation scheme; according to the local topography of typhoon wind field simulation, combined with the CFD model, put forward the calculation method of numerical WRF and CFD nested case. Using WRF model in three kinds of boundary layer scheme, YSU scheme, Mellor-Yamada-Janjic (MYJ) scheme and MRF scheme, and three kinds of cumulus parameterization schemes, namely Kain-Fritsch (KF), Betts-Miller-Janjic (BMJ) and Grell-Devenyi (GD) 9 different combination schemes, on the history of the three A typhoon case: 0812 typhoon "parrot", the 0814 typhoon "Hagupit" and "1003 typhoon CHANTHU" numerical simulation, analysis of various schemes of WRF on the path of typhoon, typhoon intensity, near the center of maximum wind speed, wind direction and other simulation results. The CFD model is built Tanglangshan area of Shenzhen the extraction of WRF model of high precision numerical simulation results can "1003 typhoon", as the initial wind field of CFD model, WRF model and CFD method to realize the data transmission, to complete the operation. The analysis shows that the nested simulation results, only the accurate simulation of the near surface wind field of typhoon characteristics using WRF the operation mode is not, WRF model and nested CFD, can well simulate the near surface wind field of typhoon characteristics, the result has important value for engineering application.

【學(xué)位授予單位】：哈爾濱工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TU312.1

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