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(1 中國(guó)建筑科學(xué)研究院，北京 100013； 2 民航新時(shí)代機(jī)場(chǎng)設(shè)計(jì)研究院有限公司上海分公司，200335)
［提要］以溫州機(jī)場(chǎng)新航站樓工程為背景，通過(guò)在數(shù)值模擬平臺(tái)上建立數(shù)值風(fēng)洞模型，對(duì)工程在考慮臨近建筑干擾的工況下的平均風(fēng)荷載進(jìn)行了數(shù)值模擬仿真。在數(shù)值風(fēng)洞模型中，著重對(duì)自保持平衡大氣邊界層的模擬進(jìn)行了仔細(xì)考察。在基于提出的新的湍流來(lái)流邊界條件下，對(duì)所使用的SST k-ω湍流模型中的參數(shù)以及地面邊界的粗糙度參數(shù)進(jìn)行適當(dāng)選取，使得這一計(jì)算風(fēng)工程數(shù)值模擬中非常重要但同時(shí)難以解決的前提問(wèn)題得到很好解決，從而避免了由于邊界層的不恰當(dāng)模擬引入的誤差。對(duì)影響鈍體繞流計(jì)算結(jié)果的重要因素諸如計(jì)算域構(gòu)造、網(wǎng)格離散、湍流封閉模型、對(duì)流項(xiàng)離散格式等進(jìn)行了仔細(xì)選取，從而提高了數(shù)值模擬的精度。
［關(guān)鍵詞］計(jì)算風(fēng)工程；平衡大氣邊界層；SST k-ω；模型；大跨屋蓋結(jié)構(gòu)；風(fēng)載體型系數(shù)
Numerical Simulation for Wind Loads of New Wenzhou Airport Terminal/Yang Wei1, Jin Hai1, Jin Xinyang1, Chen Dailin1, Wang Zengchun1, Xiong Hongjun2 (1 China Academy of Building Research, Beijing 100013, China; 2 New Time Airport Design Institute Company，Shanghai Branch, Shanghai 200335, China)Abstract:The mean wind loads of New Wenzhou Airport Terminal considering the interference effect of neighboring building are calculated through constructing appropriate numerical model. In the numerical simulation, the important precondition for numerical simulation, i.e. the modeling of the selfsustaining equilibrium Atmosphere Boundary Layer (ABL), had been emphasized and investigated. Based on a new set of inflow turbulence conditions  and combined with
the proper parameters in SST k-ω turbulence model and the rough wall model, it made this important but difficultly solved precondition be satisfied well. Thus the errors caused by the improper modeling of ABL had been avoided. Besides, several important numerical parameters which would affect the results heavily, such as the calculation domain, mesh resolution, turbulence models and differencing scheme of convective terms had been considered carefully and the accuracy of numerical simulation had been improved.
Keywords:computational wind engineering; equilibrium ABL; SST k-ω model; large span roof; shape factor of wind load