Spectra of Turbulence in Wakes behind Circular Cylinders

One‐dimensional spectra of turbulent wakes behind circular cylinders are measured in the range of 50‐800 diam downstream of the cylinders and for a Reynolds number range of 320‐95 000. The spectra of large‐scale (low‐wavenumber) turbulence are anisotropic and dynamically similar. The small‐scale turbulence is locally isotropic and an inertial subrange was found for large Reynolds numbers. A proposed formula describes the spectra over the entire wavenumber range and for all Reynolds numbers.