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Validating the Harmonic Balance Method for Turbomachinery Tonal Noise Predictions

Daniel Lindblad (Institutionen för tillämpad mekanik, Strömningslära) ; Niklas Andersson (Institutionen för tillämpad mekanik, Strömningslära)
Proceedings of the 55th AIAA Aerospace Sciences Meeting AIAA 2017-1171, (2017)
[Konferensbidrag, övrigt]

A computational method for predicting turbomachinery tonal noise is presented. It is based on the Harmonic Balance method, which solves for the dominant frequencies of the flow generated by bladerow interaction. Coupling between the resolved frequencies is furthermore enabled since the Harmonic Balance method is applicable to the nonlinear Euler or Navier-Stokes equations. The implementation is also validated against two cases from the Fourth Computational Aeroacoustics Workshop on Benchmark Problems hosted by NASA. The computational setup is explained in detail and specific challenges encountered in both benchmark problems are discussed. Results generally show very good agreement with data published by several other authors, giving confidence in the capability of the method. Some remaining challenges for the implemented method necessary to compute full scale turbomachinery noise are also identified and discussed.

Nyckelord: Computational Aeroacoustics, CAA, Harmonic Balance Method, Turbomachinery, Tonal Noise


Copyright by American Institute of Aeronautics and Astronautics



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Denna post skapades 2017-01-25. Senast ändrad 2017-02-21.
CPL Pubid: 247699

 

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