Measurement of Two-Dimensional Energy Spectra in a Turbulent Boundary Layer

摘要

Here we present an experimental technique using hot-wire anemometry to measure the two-dimensional (2-D) energy spectra of the streamwise velocity component (u). The measurements are carried out in a turbulent boundary layer at friction Reynolds numbers of 1950 and 3350 and are validated against the 2-D spectra obtained from the direct numerical simulation (DNS) of Sillero et al. [9] at matched Reynolds numbers. Based on these comparisons, a correction is introduced to account for the spatial resolution associated with the initial separation of the hot-wires. These findings establish the proposed technique for high Reynolds number flows in future works.