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- W4366674893 abstract "Experimental near-wake flow field measurements from two Penn State University water tunnel tests of a defeatured helicopter hub are compared with two unsteady computational fluid dynamics (CFD) analyses, CREATE(TM)-AV Helios and University of Maryland Mercury. Both CFD frameworks employ an unstructured/Cartesian multi-mesh paradigm and turbulent Spalart-Allmaras Detached Eddy Simulation (SA-DES) modeling. Experimental velocimetry measurements of mean wake velocities, harmonic content, and Reynolds stresses provide valuable validation data for CFD. Overall, the two CFD solvers were in good agreement with each other and qualitatively captured the mean and harmonic content of the wake structures with accuracy. Flow feature dissimilarities between the advancing and retreating sides were differentiated and indicated dominant regions of harmonic flow disturbances biased toward the retreating side, in good agreement with experimental observations. Quantitatively, some variation in velocity deficits and downwash were noted, either in profile character, magnitude, and/or location. Encouragingly, there was little tendency of excessive dissipation in the CFD near wake, and the harmonic content actually tended towards a common overprediction. Reynolds number effects were minimal, and grid density effects were studied but inconclusive. These efforts were part of the 3rd PSU Rotor Hub Flow Workshop in 2020." @default.
- W4366674893 created "2023-04-23" @default.
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- W4366674893 date "2021-05-10" @default.
- W4366674893 modified "2023-10-17" @default.
- W4366674893 title "Hub Flow Near-Wake Validation using CREATETM-AV Helios and UMD Mercury Framework" @default.
- W4366674893 doi "https://doi.org/10.4050/f-0077-2021-16879" @default.
- W4366674893 hasPublicationYear "2021" @default.
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