実測に基づく屋上風と通風および空調風の気流特性に関する研究

概要

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This study aims at characterizing flow feature specific to wind over the buildings and air flows in cross-ventilated and air-conditioned rooms based on instantaneous velocity measurement and analysis. Attention was focused upon similarities and differences of these airflows and data were analyzed from viewpoints of temporal and spatial fluctuations. The results were summarized as follows: 1) The energy spectra of these different airflows contain some region of wavenumber to obey exponential decay of k^<-5/3> variation. 2) The major contributions to the energy spectra of the wind over the buildings and cross ventilation are revealed at the range with frequencies less than 0.1Hz. 3) The rapid decay of energy spectra of air flows in cross-ventilated and air-conditioned rooms is represented at the range with frequencies more than 4Hz. 4) The main contributions to the energy spectra of wind over the buildings and cross ventilation are revealed at the range with frequencies from 0.01 to 0.1Hz. On the other hand, the contribution of airflow in air-conditioned rooms arises at the range with frequencies from 0.1 to 1Hz. 5) The concentrations to the energy spectra are shown at the range with wavenumbers from 0.01 to 0.1 rad/m in the case of wind over the building and at the ranges from 0.1 to 1 rad/m and from 1 to 10 rad/m in the cases of air flows in cross-ventilated and air-conditioned rooms respectively.
社団法人日本建築学会の論文
2005-03-30