TEST ON PEDESTRIAN AREA WIND ENVIRONMENT AROUND HIGH RISE BUILDINGS

The making, calibrating and using of Irwin probe are analyzed though a wind tunnel test, and the study on pedestrian area wind environment around high rise buildings is carried out by applying self-made Irwin probes and simple wind direction sensors. The results show that the Irwin probe with good calibration linearity, which made by organic glass, can be used at pedestrian level wind velocity. The high wind speed should be selected in the wind tunnel test considering the accuracy of pressure sensor precision. The pedestrian level wind directions are obtained by photographing the simple wind direction sensors. The wind environment problems are obvious in narrow streets among buildings and corners where the wind velocity ratio are relative larger because of narrow road effects and corner streams, the remedial action had to be taken to reduce the wind speed. At the same time, the discomfort critical wind speed on pedestrian is discussed, which is obtained from testing on 200 volunteers in a wind tunnel.