Noise modelling of highly over-expanded TIC nozzle flows

ARA Murali, SA Karabasov, V Gryazev… - 28th AIAA/CEAS …, 2022 - arc.aiaa.org
28th AIAA/CEAS Aeroacoustics 2022 Conference, 2022arc.aiaa.org
A two-component jet noise model is developed to predict the noise signature of a Truncated
Ideal Contour (TIC) nozzle operating at pressure ratios of 30 to 50. The first part of the
combined model is based on the implementation of the Miller and Morris model for Broad
Band Shock Associated Noise (BBSAN) calculations with and without taking into account the
nozzle wall shielding effect. The jet mixing noise part of the model is based on the
Generalised Acoustic Analogy (GAA) model focused on the noise sources downstream of …
A two-component jet noise model is developed to predict the noise signature of a Truncated Ideal Contour (TIC) nozzle operating at pressure ratios of 30 to 50. The first part of the combined model is based on the implementation of the Miller and Morris model for Broad Band Shock Associated Noise (BBSAN) calculations with and without taking into account the nozzle wall shielding effect. The jet mixing noise part of the model is based on the Generalised Acoustic Analogy (GAA) model focused on the noise sources downstream of the nozzle exit. To reconstruct noise sources of the statistical models, the jet flows are solved with the Reynolds-Averaged Navier-Stokes (RANS) method, and a Green’s function method is used to propagate the acoustic solution to the far-field. The acoustic model depends on several parameters which are calibrated using the far-field noise data for one nozzle pressure ratio and one observer angle. After this the far-field predictions for other operating conditions and observer angles are compared with the experimental data.
AIAA Aerospace Research Center
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