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- W2078373068 abstract "A CFD-CAA hybrid method for fan noise prediction is presented and compared to experimental data. The study shows a very good agreement between numerical simulations and experimental measurements regarding the level of the rotor-stator interaction tones generated by a Ultra-High Bypass Ratio Fan designed by DLR. The comparison is done at a single approach condition for which the blade passing frequency (BPF 1) is cut-off. For the BPF 2, the sound pressure level measured in the inlet is in agreement within 1 or 2 dB with the experimental results. The agreement in terms of radial mode amplitudes is also very satisfying. The discrepancies are slightly higher for the BPF 3 and 4. Nevertheless the trends of the results, for instance the fact that the tone is higher at BPF 4 than BPF 3, are all well predicted. Most of the discrepancies are of the order of the amplitude variations measured between the two investigated experimental runs. The boundary layer influence on the sound propagation is shown to increase with the frequency as stated in literature. Some numerical results from the bypass duct are also presented." @default.
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- W2078373068 date "2009-05-11" @default.
- W2078373068 modified "2023-10-14" @default.
- W2078373068 title "CFD/CAA Coupling Applied to DLR UHBR-Fan: Comparison to Experimantal Data" @default.
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- W2078373068 doi "https://doi.org/10.2514/6.2009-3342" @default.
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