山岳地における風の分布と乱流特性

Abstract

Spatial distribution of wind and turbulence characteristics over the mountainous region are investigated. Field observations of wind by propeller anemometers were made along the test power transmission line (Tsuruga Test Line) near the ridge. In this area, northerly and southerly wind direction is dominant due to east-west direction of the ridge line.Therefore, analysis was made for the cases of the north wind and the south wind.However, in the cases of the southerly wind, strongest wind cases at the top of the No. 3 tower among other observing points are seen a little easterly deviated wind case. These cases can be classified into a different group of data from other southerly wind cases.Different spatial distributions of wind characteristics were found among these groups. The difference between the north wind and the south wind may be attributed to the local topography, because the ridge line is located a little south of the test line. It is considered that slight deviation of wind direction over this area made the difference between two groups of the south wind due to the topography. In relation to the turbulence intensity, integral scale of the turbulence for the north wind is larger than that for the south wind.