Application of a 2.5D harmonic balance method to a calculation of unsteady disturbances propagation through a duct of a turbofan
A. A. Rossikhin, V. I. Mileshin
Central Institute of Aviation Motors
The method of calculation of tone noise propagation through a duct of turbomachine, taking into account nonlinear effects, is presented. It is based on the decomposition of the
solution on the set of circumferential modes and performing the calculations for the
complex amplitudes of this modes using harmonic balance approach. The usage of the
method can lead to an acceleration of simulations of noise propagation through inlets and
nozzles of turbofans in the cases when the nonlinear effects cannot be neglected. The
method is implemented in the CIAM 3DAS (3 Dimensional Acoustics Solver) in-house
solver. It was verified on the problem of nonlinear interaction of circumferential modes
in 2D cylindrical channel. The results of the calculation, performed using the method,
showed satisfactory correspondence with the results of the time domain calculation.
fan noise, tone noise, computational aeroacoustic, frequency domain methods, harmonic balance method, 2.5D method of calculation.
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A. A. Rossikhin, V. I. Mileshin, “Application of a 2.5D harmonic balance method to a calculation of unsteady disturbances propagation through a duct of a turbofan”, Matem. Mod., 33:7 (2021), 93–108
Citation in format AMSBIB
\by A.~A.~Rossikhin, V.~I.~Mileshin
\paper Application of a 2.5D harmonic balance method to a calculation of unsteady disturbances propagation through a duct of a turbofan
\jour Matem. Mod.
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