塔桅结构三维定常风场风洞试验及数值模拟

Wind Tunnel Test on 3-D Steady Wind Flow Field of Tower Mast Structure and Numerical Simulation

利用风洞试验对杭州湾跨海工程海中平台及观光塔模型在各种风向角下的风压分布情况进行了测试,研究了观光塔结构在不同方向风荷载作用下风压的变化情况。采用FLUENT 6软件平台,选用标准k-ε和Realizable k-ε2种湍流模型计算了大气边界层中杭州湾跨海工程海中平台与观光塔的定常风流场,并将数值计算结果与风洞试验结果进行了比较。结果表明:基于FLUENT6的标准k-ε和Realizable k-ε模型均能给出工程设计要求的精度;但对建筑物的不同位置,2种模型反映的精度有所区别。该研究可为精确计算风荷载提供依据,对工程设计有较好的参考价值。

The behavior of wind pressure distribution on the cross-sea engineering of Hangzhou Bay tower mast structure under different angles was investigated through wind tunnel test. The variation situations of wind pressure on tower mast structure were measured and studied under different directions wind loads. The steady wind flow field of a 3-D tower mast structure immersed into atmosphere boundary was numerically simulated using FLUENT 6. Two turbulence models, standard κ-ε model and Realizable κ-ε model, were used in the numerical simulation. The detailed comparison between numerical simulation results and wind tunnel test results was carried out. The results show that both standard κ-ε model and Realizable κ-ε model in FLUENT 6 can give the accurate enough results from the view of engineering application. But the simulation precisions of these two models exist some differences between the buildings. Therefore, it is vital to determine wind load precisely for engineering design of such important structures through comparing analysis.