A Comprehensive Model for the Turbulent Boundary Layer Pressure Spectrum

摘要

Using test data from wind tunnel and water channel fluid flow tests, the model originally developed by Chase for the low wavenumber spectrum of the pressure in a turbulent boundary layer has been extended to cover the entire wavenumber and frequency range. Particular attention is given to the low wavenumber and high frequency regions. The low wavenumber spectrum level is found to be nearly constant and a theoretical basis for this is proposed. The high frequency spectrum level is found to correlate best with the inner variables (shear stress and viscosity) while the remaining regions correlate best with the outer variables (convection velocity and boundary layer thickness).