Analytical properties of noise generating mechanisms in a supersonic jet exhaust flow, Volume 1848
National Aeronautics and Space Administration, 1971 - Technology & Engineering - 62 pages
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According to Equation analytical solutions assumed boundary conditions characteristic component constant convected wave equation convection factor convection Mach number coordinates core length directivity pattern Doppler shift Equation 31 etal experimental Ffowcs Williams field noise given high speed jet hydrodynamic sources jet exhaust flow jet flow jet noise Lighthill Lighthill's theory longitudinal wave number low frequency Mach mode radiation Mach wave radiation mean flow mixing layer mixing region mixing zone noise generating mechanisms noise intensity noise prediction noise radiation noise spectrum overall sound power parameters peak Strouhal number Phillips power spectrum proportional radiation angle refraction effect resolvent kernel rocket noise scale ratio shear flow shear noise solutions S.l sonic sound pressure level sound source source function source integral source terms Spectra speed of sound subsonic jet transition zone transonic transverse wave Turbulent Jets Turbulent Shear Flow turbulent source strength turbulent structure velocity fluctuation wave function wave propagation zero