TY - JOUR
T1 - On the interaction of a sound pulse with the shear layer of an axisymmetric jet
AU - Maestrello, L.
AU - Bayliss, A.
AU - Turkel, E.
N1 - Funding Information:
.; This work was supported under NASA Contracts No. NASI-14101 and NASl-15810 while the second and third authors were in residence at ICASE, NASA Langley Research Center, Hampton, Virginia 23665. Additional support for the third author was provided under U.S. Air Force Office of Scientific Research Contract No. AFOSR-76-288 1.
PY - 1981/1/22
Y1 - 1981/1/22
N2 - The behavior of a sound pulse from a simulated source in a jet is investigated both experimentally and numerically. Both approaches show that in the low and medium frequencies the far field acoustic power exhibits a marked amplification as the flow velocity increases. Experimentally this changes to an attenuation at the higher frequencies which cannot be computed by the numerical model. This amplification is traced to shear noise terms which trigger the instability waves that are inherent within the flow.
AB - The behavior of a sound pulse from a simulated source in a jet is investigated both experimentally and numerically. Both approaches show that in the low and medium frequencies the far field acoustic power exhibits a marked amplification as the flow velocity increases. Experimentally this changes to an attenuation at the higher frequencies which cannot be computed by the numerical model. This amplification is traced to shear noise terms which trigger the instability waves that are inherent within the flow.
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U2 - 10.1016/0022-460X(81)90510-1
DO - 10.1016/0022-460X(81)90510-1
M3 - Article
AN - SCOPUS:0019478339
SN - 0022-460X
VL - 74
SP - 281
EP - 301
JO - Journal of Sound and Vibration
JF - Journal of Sound and Vibration
IS - 2
ER -