Abstract
The pedestrian-level wind environment quality in street canyons formed by high-rise buildings and other low-level buildings could be affected by multiple factors, such as the height and geometry of the surrounding buildings, street width, wind direction, and wind speed. This study conducted wind tunnel experiments to determine the characteristics of the pedestrian-level wind environment in street canyons under different conditions, including different street widths, podium heights, and approaching wind directions. The experimental results revealed that the effects of the street canyon width on the pedestrian-level wind in a street canyon can be categorized into three different flow regimes. A higher podium creates stronger wind speeds of the flow within the street canyon, and different approaching wind directions change the high-wind-speed zone within the street canyon accordingly.
Highlights
Limited city land resources approach saturation with economic development
The wind speed measurement results of S = 0.75D = 15 m and S = 1.25D = 25 m are classified as interaction flow, the maximum wind speeds appeared near the entrance to the street canyon, and the locations were at approximately Y = 0.5D (Y is the length of the street canyon), slightly toward the downstream compared to the previous resistance flow
Taking the street canyon formed by a high-rise building with a podium and the adjacent attached low-rise houses as the main controllers, this study explored the pedestrian-level wind flow characteristics inside the street canyon
Summary
Limited city land resources approach saturation with economic development. Building contractors attempt to satisfy the limits of building codes, while using land efficiently. The arrangement spacing was set at four parallel buildings with dimensions of 25 m (width) × 25 m (depth) × 125 m (height), and the adjacent spacing of 0, 6.25, 12.5, 18.75, and 25 m for the wind tunnel testing Their results showed that the maximum dimensionless wind speeds in the street canyon were 1.06, 1.0, 1.12, 1.15, and 1.11 for the spacings of 0, 6.25, 12.5, 18.75, and 25 m, respectively. This study conducted wind tunnel experiments to explore the pedestrian-level wind characteristics in the street canyon formed by a high-rise building with a podium and the adjacent low-rise attached houses under different podium heights, street canyon widths, and approaching wind directions. This study conducted wind speed measurements in many places, including the front of the street canyon, inside the street canyon, and downstream of the street canyon, to fully understand the flow around the two adjacent buildings
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