John Turner



Document Type

Data Set

Publication Date



Mechanical Engineering

Description or Abstract

Data set taken in a 19 row x 5 column array of model wind turbines. Turbines here are modeled as drag matched (C_T=0.92) porous disks with 0.51 porosity. Disks are 0.25 m in diameter with an incoming boundary layer height of about 0.8 m. Velocity profiles from a pitot tube were obtained in the center column at x/D=6 in the streamwise direction behind each row. The turbine array studies were conducted in the University of New Hampshire (UNH) Flow Physics Facility (FPF). The UNH FPF is a large physics quality turbulent boundary layer wind tunnel. The test section measures 6 m (W) x 2.7 m (H) x 72 m (L). Test section velocities of up to 14 m/s can be achieved with free stream turbulence intensities less than 0.5% at all downstream locations. Naturally grown turbulent boundary layers on the order of 1 meter thick with the correct range of scales, and Reynolds numbers based on boundary layer scale ratios, with delta plus around 20,000 (corresponds to delta=0.7-0.8 m) can be achieved towards the downstream end of the test section. Spanwise variation in friction velocity measured with a preston tube is less than +/- 0.5% when outside of the side wall boundary layers. The ceiling of the test section slopes slightly upward to help eliminate pressure gradient based on the growth of boundary layers tripped on the floor and two side walls.



Public (open access)


MIT License