Study on the influence of voids on high-rise building on the wind environment

Li, Yangluxi; Chen, Lei

A wind tunnel test was conducted by Tsang et al. (2012) . As a case study, a 1:200 model test was conducted at CLP Power Wind Wave Tunnel Facility (WWTF) of Hong Kong University of Science and Technology. The wind tunnel is a device testing wind condition implementing for civil engineering etc. are coupled with a close circuit subsonic boundary layer (Fig. 5) . It includes two measured parts: high and low speed section respectively. In present study, it was performed only in the high-speed testing section with a cross-section of 3 m × 2 m. Inlet averaged reference mean airflow velocity set as 10 m/s and the normalized wind speed WVA was used for validated the results between simulation and measurement. All building models were modelled under a scale of 1/200. In addition, as the wind tunnel just utilized for CFD validation, a single building model with fixed 25 m depth was only chosen for comparison with simulation result. Irwin sensors were used for perform indicators for whole wind tunnel measurement at height of 10 mm from ground equivalent to 2 m for building. They distributed around tested buildings at the upstream of 1.5d, and downstream of 15d (d means depth of building). Figure 6 shows the wind tunnel measurement and comparison of validation results (Tsang et al. 2012) .