- 摘 要
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周 驥， 李元齊， 張其林
(同濟大學(xué)建筑工程系，上海200092)[摘要] 選用Realizable к-ε 和RNG к-ε 兩種湍流模型對大氣邊界層中球殼的定常風(fēng)流場進行了數(shù)值模擬，并將計算結(jié)果與風(fēng)洞試驗進行了比較。結(jié)果表明，Realizable к-ε 模型和RNG к-ε 模型均能為工程應(yīng)用提供有效的參考，并可以在一定程度上對荷載規(guī)范進行補充。對于球殼，數(shù)值模擬的精度基本可以達到工程應(yīng)用的要求。這為空間曲面鈍體繞流現(xiàn)象的數(shù)值模擬提供了依據(jù)。比較而言，RNC к-ε 模型的計算結(jié)果更為合理。
[關(guān)鍵詞] 計算風(fēng)工程；球殼；數(shù)值模擬Numerical simulation of 3D steady flow around a sphere shen
zhou Ji, Li Yuanqi, Zhang Qilin
(Department of Building Engineering, Tongji Univeysity, Shanghai 200092, China)Abstract: The 3D steady wind flow-field of a sphere shell immersed into atmosphere houndary is numerically sinulated based on two turbulence models, Realizable к-ε model and RNG к-ε model. The detailed comparison between numerical simulation and wind tunnel tests is given. The results show that hoth moclels can give useful results fmm the point of engineering application, although the results obtained from the RNG к-ε model are relatively more reasonable. At the same time, the precision of the numerical simulation can satisfy the demand of engineering application for the shell. Moreover, these results can make up loads code to some extent and provicle efficiert information for structures with patial curve surface.
Keywords: commputational wind engineering; sphere shell; numerical simulation
