Turbulent drag reduction by spanwise wall forcing. Part 2. High-Reynolds-number experiments
Turbulent drag reduction by spanwise wall forcing. Part 2. High-Reynolds-number experiments
Here, we present measurements of turbulent drag reduction in boundary layers at high friction Reynolds numbers in the range of $4500 \le Re_\tau \le 15000$. The efficacy of the approach, using streamwise travelling waves of spanwise wall oscillations, is studied for two actuation regimes: (i) inner-scaled actuation (ISA), as investigated …