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以中华城商业社区高层建筑群为工程背景,采用RNGk-ε湍流模型模拟了建筑群中超高层建筑的表面平均风压分布及周围风环境,计算了与风洞试验等雷诺数及增大来流风速和模型尺寸提高雷诺数后的两类雷诺数工况,并同风洞试验结果进行了对比。结果表明,在等雷诺数情况下,风洞试验和数值模拟得到的超高层建筑表面风压分布较为一致,数值差别在15%以内;数值模拟与试验雷诺数相差25倍的工况中,当多数建筑主轴向与来流风速成一定角度时,超高层建筑的风压分布及周围流场的数值模拟结果与试验较一致;当多数建筑主轴向与来流风速平行时,尾流中旋涡分布的数值模拟结果与试验差异明显,但平均风压分布的数值模拟与试验结果略显差别。
Taking the high-rise commercial buildings in Zhonghua Cheng as an example, the RNG k-ε turbulence model was used to simulate the surface mean wind pressure distribution and the surrounding wind environment in the buildings. The Reynolds numbers, such as wind tunnel test, Wind speed and model size increase Reynolds number Reynolds number of working conditions, and wind tunnel test results were compared. The results show that under equivalent Reynolds number, wind pressure distribution on the surface of super high-rise building obtained by wind tunnel test and numerical simulation is more consistent, the difference is less than 15%; when the numerical simulation is different from the experimental Reynolds number by 25 times, The wind pressure distribution and the surrounding flow field in the super high-rise building are in good agreement with the experimental results when most of the main building axes are at an angle to the incoming wind speed. When most of the main building axial winds are parallel to the incoming wind speed, The results of the numerical simulation and the test show obvious differences, but the numerical simulation of the average wind pressure distribution is slightly different from the experimental results.