1. The problem statement, all variables and given/known data Hi guys, I just wanted to verify my calculation of a reynolds number of a wind turbine. I understand that the reynolds number will vary in a spanwise direction along the blade due to changes in the characteristic length(chord width) and velocity(due to the tip speed ratio). As a way to approximate the reynolds number I've taken an average chord length. V = 5 (free stream velocity) lamda = 6 (tip speed ratio) v* = kinematic visocity of air at 10degrees = 1.4207E-5 l = 0.5 (average chord length) 2. Relevant equations Re = (V*l)/v* 3. The attempt at a solution Now this is the part im unsure of. Do I find an average velocity as follows for the calculation: Vavg = (V*lamda)/2 (Average velocity) and then calculate as follows: (Vavg*l)/v* = 527,909 I would appreciate any verification.