Various computational approaches differing in complexity and accuracy can be used to simulate flows around rotating lifting surfaces. Here, the flow field around a hovering propeller is estimated by two disparate methods, Reynolds-averaged Navier-Stokes (RANS) equations vs. wall-modelled large eddy simulation (WMLES), and compared to experimental data. In both cases, the computed thrust is somewhat lower than the measured value, mostly because the measuring equipment, located behind the propeller, disrupted the wake, thus changing the aerodynamic loads over the blades. However, the effect of the computational grids and approaches to resolving the rotational motion and turbulence are not negligible. They can be quantified in a particular case of a small-scale propeller operating at nominal angular frequency. For that reason, different computational domains, grids and numerical set-ups are tried and compared. It is observed that by careful geometric modelling, fine meshes, LES and inclusion of actual experimental set-up, a much-improved correspondence between the two sets of data can be achieved.
Accounting for the Effects of Experimental Setting in Propeller Flow Computation
Sustainable aviat.
International Symposium on Aviation Technology, MRO, and Operations ; 2022 ; Belgrade, Serbia September 14, 2022 - September 16, 2022
2023-11-23
6 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
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