COMPARISON OF TURBULENCE CHARACTERISTIC IN VARIOUS SITES IN JAPAN AND FOREIGN COUNTRIES

Abstract

We have analyzed the wind conditions of a couple of sites in Japan and foreign countries, particularly paying attentions to the fluctuation in wind directions. We have proposed an evaluation formula for the fluctuation intensity in the wind direction. In recent years, we have built wind poles and small wind turbines at several locations in Japan and abroad, mainly in Kyushu, and have been performing daily wind condition and power generation data acquisition and analysis. We compared wind turbulence, i.e., wind speed and wind direction variability, between mountainous and coastal winds in Japan and those in other countries (e.g., seaside), and reported the differences. We have found a large difference in turbulence between the complex terrain and seaside areas.