Accession Number:

AD0655795

Title:

ACOUSTIC ENERGY FLUX FROM SHOCK-TURBULENCE INTERACTION.

Descriptive Note:

Technical note,

Corporate Author:

TORONTO UNIV (ONTARIO) INST FOR AEROSPACE STUDIES

Personal Author(s):

Report Date:

1967-07-01

Pagination or Media Count:

26.0

Abstract:

The analysis of the sound field generated by the passage of isotropic turbulence through a shock of finite strength Ribner, 1953, 1954 was extended to provide the flux of acoustic energy. The energy flux varies almost linearly with shock density ratio, reaching a maximum at infinite Mach number of 0.062 of the flux of turbulence kinetic energy. Direct comparison with a result obtained by Lighthill 1953 is misleading. His energy relations, reckoned relative to a frame moving with the fluid, must be converted to the shock-fixed frame used in this report. The converted results of his theory weak shocks and the results of the authors theory arbitrary shocks appear to show a similar asymptotic behavior for vanishing shock strength they diverge with increasing shock strength. Author

Subject Categories:

  • Aerodynamics
  • Acoustics
  • Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE