CAARC模型间距对缝隙流流场特性的影响

The Effect of CAARC Model Spacing on the Characteristics of Slit Flow

摘要: 为了研究建筑物间距对流场特性的影响，本次试验采用两个缩尺比同为1:100的CAARC模型，通过改变两个CAARC模型的间距比，运用三维脉动风速仪测得了风速时程，进而得到了不同间距比和高度比下并列CAARC模型周围流场的湍流积分尺度和湍流强度。并对各个测点处的湍流强度和湍流积分尺度进行了分析。结果表明：测点4处的积分尺度随模型距比增大而减小，湍流强度随模型间距比增大而增大；测点1、测点2、测点3的积分尺度随模型间距比增大而增大，湍流度随模型间距比增大而减小。

Abstract: In order to study the influence of building spacing on the flow field characteristics, two CARRC mod-els with the same scale ratio of 1:100 were adopted in this experiment. By changing the spacing ra-tio of the two CARRC models, the wind speed time history can be obtained by utilizing the three-dimensional pulsating anemometer. Then, the turbulence integral scale and turbulence in-tensity of the flow field around the parallel CARRC model can be presented under different spacing ratio and height ratio. The turbulence intensity and turbulence integral scale at each measuring point were analyzed. Based on the experimental data, the following conclusion can be drawn: with the increase of model spacing ratio, the turbulence integral scale at measuring point 4 decreased and the turbulence intensity increased. Conversely, the turbulence integral scales at measuring point 1, measuring point 2 and measuring point 3 increased with the increase of model spacing ra-tio, and the turbulence intensity decreased with the increase of model spacing ratio.In order to study the influence of building spacing on the flow field characteristics, two CAARC mod-els with the same scale ratio of 1:100 were adopted in this experiment. By changing the spacing ra-tio of the two CAARC models, the wind speed time history can be obtained by utilizing the three-dimensional pulsating anemometer. Then, the turbulence integral scale and turbulence in-tensity of the flow field around the parallel CAARC model can be presented under different spacing ratio and height ratio. The turbulence intensity and turbulence integral scale at each measuring point were analyzed. Based on the experimental data, the following conclusion can be drawn: with the increase of model spacing ratio, the turbulence integral scale at measuring point 4 decreased and the turbulence intensity increased. Conversely, the turbulence integral scales at measuring point 1, measuring point 2 and measuring point 3 increased with the increase of model spacing ra-tio, and the turbulence intensity decreased with the increase of model spacing ratio.