城市地区近地强风特性实测研究

This paper presented the analysis results of wind velocity data measured from an ultrasonic anemometer installed at the 47 m high location on the Beijing Meteorological Tower. The results have revealed that the turbulence intensity and gust factor of strong wind near ground are greater than normal. Most of the measured longitudinal turbulence intensities are greater than 0.3. The turbulence intensities at three directions are found to decrease with the increase of mean wind speed. There is a little difference between the ratio of turbulence integral length scale from field measurements and the value summarized by Solari and Piccardo, where the average longitudinal turbulence integral length scales accord with the Code of AIJ. The turbulence power spectra can fit Von Karman spectrum very well, thus illustrating that Von Karman spectrum is able to describe the energy distribution fairly well for the wind speed above the central district of Beijing.