ACOUSTIC ENERGY FLUX FROM SHOCK-TURBULENCE INTERACTION.
TORONTO UNIV (ONTARIO) INST FOR AEROSPACE STUDIES
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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
- Fluid Mechanics