NATIONAL AERONAUTICS AND SPACE ADMINISTRATION CLEVELAND OH LEWIS RESEARCH CENTER
Interaction of convected field of turbulence with shock wave is analyzed to yield modified turbulence, entropy spottiness, and noise generated downstream of the shock. Analysis is generalization of single-spectrum-wave treatment of TNN 2864. Formulas for spectra and correlation are obtained. Numerical calculations yield curves of rms velocity components, temperature, pressure, and noise in db against Mach number for M 1 to both isotropic and strongly axisymmetric lateralLongitudinal 361 initial turbulence are treated. In either case, turbulence of 0.1 percent longitudinal component generates about 120 dbs of noise.