風洞実験およびCFDを併用した通風時の開口条件や主風向が異なる場合における建物内外の気流性状に関する研究

概要

論文の詳細を見る
Air flow characteristics of cross-ventilation in and around 5 types of building models were examined in this paper. The examination cases of cross-ventilation were changed by the conditions of the openings and the angles of the approaching wind. Both methods of wind tunnel experiment and numerical simulation were employed. The air flow characteristics were discussed from the following 5 viewpoints: ventilation rate, main air flow path, wind pressure coefficient distribution, air velocity distribution and coefficient of pressure loss. The following findings were obtained: 1) The difference of wind pressure coefficient among models is within 0.2, even though the conditions of the openings were different and overall flow exhibits no substantial change around the building when the angle of approaching wind was 0°. The air flow passing through the windward opening ran downward. The coefficients of pressure loss of windward and leeward openings were not different. 2) The ventilation rate in 0〜45° angles of approaching wind was decreased in small amount and pressure coefficient was decreased with the increase of the angle of approaching wind by every 22.5°. The air flow keeping approaching wind direction ran straight after entering the windward opening.
社団法人日本建築学会の論文
1999-06-30