, Volume 43, Issue 3, pp 247-271

The Askervein Hill Project: Mean wind variations at fixed heights above ground

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Abstract

This is one of a series of papers on the Askervein Hill Project. It presents results on the variations in mean wind speed at fixed heights (δz) above the ground from linear arrays of anemometer posts and towers. Most of the data are for δz = 10 m but some are for δz = 3 m. Selected and directionally grouped data from the 55 ‘Mean Flow’ runs are presented together with mean flow data from Askervein '83 ‘Turbulence’ runs. Comparisons are made between the data and guideline estimates of fractional speed-up ratio at hilltop locations and between the data and MS3DJH/3 model predictions along the tower lines. There is good agreement in most cases.