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

The Askervein Hill Project presents results on the variations in mean wind speed at fixed heights ( Delta z) above the ground from linear arrays of anemometer posts and towers. Most of the data are for Delta z = 10 m, but some are for Delta z = 3 m. Selected and directionally grouped data from the 55 mean flow runs are presented together with mean flow data from Askervein 1983 turbulence runs. Comparisons are made between the data and guideline estimates of fractional speedup ratio at hilltop locations and between the data and MS3DJH/3 model predictions along the tower lines. There is good agreement in most cases.