地表面上の障害物群の統計的特徴に基づく平均風速鉛直分布の評価

概要

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In this study, evaluation formulae are proposed for the power law profile of mean wind speed over pseudo urban area in a wind tunnel by analyzing statistical characteristics of obstacle geometry. First, statistical characteristics of urban obstacles are investigated from a digital house map of Tokyo district so that the range of parameters to be considered will be clarified. Then, obstacle array models are proposed for parametric study of wind speed via numerical simulation. Wind speeds over a sample obstacle array, typical of urban surface, are obtained via numerical simulation, use of k-ε model. Then, evaluation formulae for mean wind speed profile are proposed as functions of plan area density, mean aspect ratio and coefficient of variation of obstacle height for upwind obstacles as well as fetch length.
社団法人日本建築学会の論文
2005-01-30