Studies on spatial structure of wind gust

Abstract

To evaluate this peak gust speed, the ratio of the peak gust speed over the mean speed (called gust factor) is defined. The peak gust is an averaged value of wind speed over a very short duration and small space and is the function of those averaging parameters as well as turbulent conditions. Experimental relation of the gust factor on the averaging time and space was studied by the results of a typhoon wind experiment made on Tarama Island in the Southwest Islands of Japan. The gust factor is independent from mean wind speed in winds higher than 14 m s-1. The space averaging the gust factor is described by a new experimental formula of exponential form. -from Authors