FURTHER EXPERIMENTS ON IRWINS SURFACE WIND SENSOR

The simple surface wind sensor proposed by Irwin measures wind speeds through pressure differences. It has been applied in several wind-tunn el laboratories for the study of pedestrian-level wind conditions. How ever, some characteristics related to sensor performance for wind-tunn el measurements have not been fully investigated. Discussed in this pa per are: calibration of the sensor for measuring mean and rms wind spe eds, the effect of sensor height on measurement errors, thr: interfere nce between nearby sensors, and the response of sensors to turbulent w ind conditions. Data presented here supplement Irwin's original result s on the surface wind sensor anti provide additional insight in the pe rformance of the sensor.