Flat plates with chevron tips of variable depths (2h) were designed and their effect on the tip vortex was studied at downstream distances, x= 0.5c to 3c at a Reynolds number of 67,000. The test plates were mounted at an angle of attack of 5 • and the tip vortex was measured using a constant temperature anemometer. The chevron plates formed tip vortices with lower peak tangential velocities and larger core radii as compared to the flat plate (with the exception of the 2h= 10 mm, which had a smaller core radius than the flat plate). It was also found that the tip vortices formed over plates with deeper chevrons exhibited turbulent cores, as opposed to the flat plate and shallow chevron plates. Vortex wandering, an inherent meandering of the tip vortex, was found to be present for every test plate. It results in an over-prediction of the core radius and under-prediction of the peak tangential velocities. To ensure that the lower peak tangential velocities and larger core radii of the tip vortices formed over chevron tip plates was due to the change in geometry and not a consequence of vortex wandering, Devenport et al's correction was applied to the shallow chevron plates and it was found that after correcting for wandering, the tip vortices formed over chevron tips still had lower peak tangential velocities and larger core radii (with the exception of the 2h= 10 mm plate) as compared to the flat plate. Nomenclature ∞ = free stream velocity c = chord 2h = chevron depth = tangential velocity = core radius = peak tangential velocity = axial velocity
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