Accession Number:

ADA278325

Title:

Shock-Turbulence Interaction and the Generation of Noise

Descriptive Note:

Corporate Author:

NATIONAL AERONAUTICS AND SPACE ADMINISTRATION CLEVELAND OH LEWIS RESEARCH CENTER

Personal Author(s):

• Ribner, H. S.

Report Date:

1955-01-01

Pagination or Media Count:

23.0

Abstract:

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.

Descriptors:

• *TURBULENT FLOW
• *NOISE
• *SUPERSONIC FLOW
• VELOCITY
• SHOCK WAVES
• ENTROPY

Subject Categories:

• Acoustics
• Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE