H2020 ENODISE: DLR Analytical Aeroacoustic Database BLI Configuration A1 and A2

This database contains the acoustic prediction results of DLR for a single operating point of the A1 and A2 configurations investigated in the framework of the European project ENODISE. In these configurations, a single two-bladed propeller is immersed in a boundary layer. The present results can be compared to the measurements carried out by the University of Bristol and the University of Twente for different boundary layer characteristics. The experimental results are saved elsewhere on the ZENODO repository.

The investigated operating point as calculated in the prediction is:

• Uinf = 33 m/s, 6500 rpm, advance ratio J=1.

The experimental measurements were conducted at a slightly lower freestream velocity.

The DLR prediction results were obtained using the analytical approach implemented in the DLR in-house program PropNoise coupled to the blade element momentum theory. The calculations were informed by the hot-wire measurements carried out in the boundary-layer as the propeller was removed.

Refer to the two references cited below to obtain more information about the theory that was applied to obtain the results: 

1.  S. Guérin, T. Lade, L. Castelucci, I. Zaman, Tonal noise emission by a low-Mach low-Reynolds number propeller ingesting a boundary layer, 29th International Congress on Sound and Vibration, 10-13 July 2023, Prague (CZ).
2.  S. Guérin, T. Lade, L. Castelucci, I. Zaman, Broadban noise emission by a low-Mach low-Reynolds number propeller ingesting a boundary layer, Inter-Noise 2023, 20-23 August 2023, Chiba (Great Tokyo), Japan.

The results for tonal and broadband noise are saved separately. The DLR results are saved into an h5 file, which can be read with e.g. python.

Further details can be found in the file DLR_documentation_A1_A2.pptx