Effects of building-height heterogeneity on area-averaged transfer velocity in the street surface—Wind tunnel experiments using salinity change technique
Effects of building-height heterogeneity on area-averaged transfer velocity in the street surface—Wind tunnel experiments using salinity change technique
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建筑物高度异质性对街道表面面积平均传输速度的影响——盐度变化技术风洞实验
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发表时间：
2004
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通讯作者：
K. Narita
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作者：
K. Narita
作为城市冠层湍流通量的一种参数化方法，峡谷内的阻力网络已经用热平衡法（Kawai and Kanda 2003）、萘升华技术（Barlow and Belcher 2002）和我们的滤纸水蒸发技术（Narita 2003）进行了研究。这种滤纸方法可以用于研究二维模型中峡谷几何形状对传递速度的影响，也可以用于比较均匀立方阵列中不同表面之间传递速度的局部差异。然而，对于异质建筑布局，由于边缘效应和空间代表性的问题，使用该技术很难研究空间平均传递速度。本文提出了一种估算面积平均传递速度的实验方法，试图阐明风洞实验中建筑物高度非均质性的影响。
As a parameterization of turbulent fluxes in urban canopy layer, the resistance network in the canyon has been studied with heat balance method (Kawai and Kanda 2003), with naphthalene sublimation technique (Barlow and Belcher 2002), and with our water evaporation technique using filter paper (Narita 2003). This filter paper method is useful to examine the effect of canyon geometry on transfer velocity in twodimensional models and also to compare the local difference of transfer velocity between the kinds of surfaces in homogeneous cubic array. About heterogeneous building arrangements, however, it is difficult to investigate the spatial-averaged transfer velocity using this technique because of a problem of edge effects and spatial representativeness. In this study, an experimental method to estimate the area-averaged transfer velocity was newly devised and tried to clarify the effect of heterogeneity of building height in wind tunnel experiments.