Further modeling of turbulent wall pressure on a cylinder for arbitrary boundarylayer thickness
Abstract
The relation of the harmonic spectral densities p sub m (k, omega) of wall pressure on a cylinder in incompressible parallel flow to pure turbulentstress sources at highly nonconvective (low) wavenumbers is formulated for arbitrarily large values of absolute value of ka and absolute value of k delta, as needed in application to towedarray noise. For the axisymmetric component of actual concern, the result to zero order in kU sub infinity omega is used in conjunction with model properties of the source spectra assumed in earlier work to characterize the dependence of the wallpressure spectrum p sub o (k, omega) were absolute value of k delta or approx 1. The results tend to confirm, within the uncertainty of the source modeling, the kind of multiplicative dependence of p sub (k, sub o) on ka embodied in the current semiempirical model.
 Publication:

NASA STI/Recon Technical Report N
 Pub Date:
 April 1982
 Bibcode:
 1982STIN...8232646N
 Keywords:

 Cylindrical Bodies;
 Incompressible Flow;
 Turbulent Boundary Layer;
 Wall Pressure;
 Amplitudes;
 Arrays;
 Expansion;
 Integral Equations;
 Stress Analysis;
 Thickness;
 Fluid Mechanics and Heat Transfer