DID YOU KNOW? DTIC has over 3.5 million final reports on DoD funded research, development, test, and evaluation activities available to our registered users. Click HERE
to register or log in.
Shock-Turbulence Interaction and the Generation of Noise
NATIONAL AERONAUTICS AND SPACE ADMINISTRATION CLEVELAND OH LEWIS RESEARCH CENTER
Pagination or Media Count:
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.
APPROVED FOR PUBLIC RELEASE