Pressure spectra in turbulent free shear flows
Abstract
Spectral models for turbulent pressure fluctuations are developed by directly Fourier transforming the integral solution to the Poisson equation for a homogeneous, constant mean shear flow. The turbulenceturbulence interaction is seen to possess a k exp 7/3 inertial subrange and to dominate the high wavenumber region. The turbulencemean shear contribution is seen to be dominant in the energy containing range and falls off as k exp 11/3 in the inertial subrange. The subrange constants and the mean square pressure fluctuation are evaluated using a spectral model for the velocity. A spectral analysis of the velocity contamination of a pressure probe is also presented. Results are compared to spectral measurements with a static pressure probe in the mixing layer of an axisymmetric jet.
 Publication:

American Institute of Aeronautics and Astronautics Conference
 Pub Date:
 June 1980
 Bibcode:
 1980aiaa.confT....G
 Keywords:

 Fluid Mechanics;
 Free Flow;
 Pressure Oscillations;
 Shear Flow;
 Turbulent Flow;
 Fourier Transformation;
 Mixing Layers (Fluids);
 Poisson Equation;
 Pressure Measurement;
 Spectrum Analysis;
 Static Pressure;
 Fluid Mechanics and Heat Transfer