Open AccessTowards the definition of a benchmark for low Reynolds number propeller aeroacoustics
Author(s) -
Damiano Casalino,
Edoardo Grande,
Gianluca Romani,
Daniele Ragni,
Francesco Avallone
Publication year - 2021
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1909/1/012013
Subject(s) - reynolds number , computational aeroacoustics , propeller , mach number , aeroacoustics , anechoic chamber , mechanics , reynolds averaged navier–stokes equations , wind tunnel , chord (peer to peer) , computational fluid dynamics , physics , acoustics , computer science , marine engineering , engineering , turbulence , sound pressure , distributed computing
Experimental and numerical results of a propeller of 0.3 m diameter operated in quiescent standard ambient conditions at 5000 RPM and axial velocity ranging from 0 to 20 m/s and advance ratio ranging from 0 to 0.8 are presented as a preliminary step towards the definition of a benchmark configuration for low Reynolds number propeller aeroacoustics. The corresponding rotational tip Mach number is 0.231 and the Reynolds number based on the blade sectional chord and flow velocity in the whole radial and operational domain ranges from about 54000 to 106000. Force and noise measurements carried out in a low-speed semi-anechoic wind-tunnel are compared with scale-resolved CFD and low-fidelity numerical results. Results identify the experimental and numerical challenges of the benchmark and the relevance of fundamental research questions related to transition and other low Reynolds number effects.