TY - GEN
T1 - Jet noise prediction of cold and hot subsonic jets using large-eddy simulation
AU - Bodony, Daniel J.
AU - Lele, Sanjiva K.
PY - 2004
Y1 - 2004
N2 - The results of four large-eddy simulations of heated and unheated subsonic jets are presented. The computations were performed using one million grid points on jets at operating conditions originally investigated by Tanna in the late 1970s [Tanna, H. K., "An Experimental Study of Jet Noise Part I: Turbulent Mixing Noise," J. Sound Vib., Vol. 50, No. 3, pp. 405-428, 1977]. Two acoustic Mach numbers are investigated (Uj/a∞ - 0.5 and 0.9) at cold (constant stagnation temperature) and heated conditions (Tj/T∞ = 1.8 and Tj/T∞, = 2.7). Changes in the jet mean fields with temperature and Mach number are found to be in agreement with published data. The far-field overall sound pressure levels are shown to be consistent with experimental data and spectral comparisons indicate that the simulation sound fields are in agreement with measurements. The limited resolution of the computations is shown to impact the radiated sound by yielding effectively low-pass filtered versions of the experimental spectra.
AB - The results of four large-eddy simulations of heated and unheated subsonic jets are presented. The computations were performed using one million grid points on jets at operating conditions originally investigated by Tanna in the late 1970s [Tanna, H. K., "An Experimental Study of Jet Noise Part I: Turbulent Mixing Noise," J. Sound Vib., Vol. 50, No. 3, pp. 405-428, 1977]. Two acoustic Mach numbers are investigated (Uj/a∞ - 0.5 and 0.9) at cold (constant stagnation temperature) and heated conditions (Tj/T∞ = 1.8 and Tj/T∞, = 2.7). Changes in the jet mean fields with temperature and Mach number are found to be in agreement with published data. The far-field overall sound pressure levels are shown to be consistent with experimental data and spectral comparisons indicate that the simulation sound fields are in agreement with measurements. The limited resolution of the computations is shown to impact the radiated sound by yielding effectively low-pass filtered versions of the experimental spectra.
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U2 - 10.2514/6.2004-3022
DO - 10.2514/6.2004-3022
M3 - Conference contribution
AN - SCOPUS:19944370497
SN - 1563477130
SN - 9781563477133
T3 - Collection of Technical Papers - 10th AIAA/CEAS Aeroacoustics Conference
SP - 2488
EP - 2504
BT - Collection of Technical Papers - 10th AIAA/CEAS Aeroacoustics Conference
PB - American Institute of Aeronautics and Astronautics Inc.
T2 - Collection of Technical Papers - 10th AIAA/CEAS Aeroacoustics Conference
Y2 - 10 May 2004 through 12 May 2004
ER -