Abstract
The problem of propagation of sound across the shear layer in a turbofan jet exhaust with an external centerbody is discussed. The wave equation of interest is the compressible Rayleigh equation. Two forms of the equation are considered, and the Green’s function solutions, subject to appropriate surface conditions on the centerbody and flight condition in the ambient, are presented. Directivity studies in a heated exhaust at temperature ratio of 2.0 and Mach number 0.90 indicate that a rigid centerbody tends to increase the sound propagation at forward angles relative to an exhaust without a centerbody, whereas application of suitable surface liner may significantly reduce this enhancement.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
