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- W4312598578 abstract "In this paper, the effects of Rossby number and Reynolds number on the evolution of forces and the flow field over a rotating wing has been studied. Force measurements were conducted for five Reynolds number (Re = 8000, 10000, 12000, 14000 & 15000) and three Rossby number cases (Ro = 4.7, 5.4 & 5.9). Quantitative flow field measurements were conducted using the rotating three-dimensional velocimetry technique for all three Rossby numbers at Re = 8000 & 15000. For the majority of the cases considered, the lift coefficient plots showed an initial steep increase, a peak and then a drop down to reach a steady state value. A steep rise and a strong peak in lift coefficient can be attributed to the formation and growth of a strong LEV. The steady state value of lift coefficient can be attributed to the continuous shedding of secondary LEVs as the wing continues to rotate. However, at select Re cases for Ro = 5.4 and Ro = 5.9, the initial steep rise in lift coefficient was not observed. Furthermore, the steady state lift coefficient at all Reynolds numbers for a given Ro was observed to be constant, and marginally higher at higher Ro. Hence, a new method was implemented to normalize the steady state lift coefficient; by normalizing the steady state lift coefficient by the corresponding Rossby number, and it was observed that the steady state lift coefficient values for all the cases collapsed onto a single value. Dye flow visualization qualitatively showed the onset, growth and shedding of both the LEV and TEV. The quantitative flow field analysis yielded a uniform LEV formation in the measurement domain considered. The circulation was determined by integrating the spanwise vorticity in the vortex core and it was observed to agree well with the lift coefficient trends for the cases considered." @default.
- W4312598578 created "2023-01-05" @default.
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- W4312598578 date "2021-05-10" @default.
- W4312598578 modified "2023-10-18" @default.
- W4312598578 title "Investigation of Three-Dimensional Flow Structures on a Rotating Wing Using a Novel Rotating Velocimetry Technique" @default.
- W4312598578 doi "https://doi.org/10.4050/f-0077-2021-16720" @default.
- W4312598578 hasPublicationYear "2021" @default.
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