Semi-empirical models as a combination of wind tunnel and numerical dispersion modelling
Semi-empirical models as a combination of wind tunnel and numerical dispersion modelling
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风洞和数值色散建模相结合的半经验模型
DOI：
10.1016/1352-2310(96)00072-6
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发表时间：
1996
影响因子：
5
通讯作者：
K. Hoeschele
中科院分区：
文献类型：
--
作者：
W. Theurer;E. Plate;K. Hoeschele
半经验模型通过结合风洞和计算数据(例如来自简单的高斯烟羽模型)来预测建成区内的排放扩散。文中给出了一个点源和中性密度释放的半经验模型的例子。它包括建筑物布置对弥散的影响，如弥散羽流的横向移动。该模型的参数，如所谓的均化半径或弥散羽流的横向移动，是通过风洞实验确定的，采用了一些典型的城市建筑布置。将半经验模型的结果与其他风洞结果和现场资料进行比较，可以发现比未修正的高斯烟羽模型对浓度有更好的预测。
Semi-empirical models predict the dispersion of releases within built-up areas by a combination of wind tunnel and calculated data, for instance from simple Gaussian plume models. An example of such a semi-empirical model for point sources and releases of neutral density is described. It includes influences of the building arrangement on the dispersion like the lateral shift of a dispersion plume. The parameters of that model, such as the so-called radius of homogenization or the lateral shift of the dispersion plume, were determined by wind tunnel experiments using some typical urban arrangements of buildings. Comparing the results of the semi-empirical model with other wind tunnel results and on-site data, a better forecast of the concentration than that with unmodified Gaussian plume models can be discovered.