@inproceedings{892fb7c4ed8e49c2b874bffe5b4d6d6e,
title = "Experimental/numerical investigation of a wingtip vortex in the near-field",
abstract = "The three dimensional wake in the near-field (0 < x/c < 3) of a wingtip vortex has been studied both experimentally and computationally. The research was conducted in the University of Limerick's medium speed wind tunnel on a NACA 0012 square tip half wing at a Reynolds number of 3.1 × 105. Single hot wire measurements recorded a maximum turbulence intensity of 9% just after the trailing edge. Maximum turbulence intensity after x/c = 0 is observed in the vortex core which decays with downstream distance. Five-hole probe mean velocity measurements revealed jet like and wake like axial velocity profiles depending on wing angle of attack, with values of 1.33U∞ and 0.83U∞ being measured for 10° and 5°. Axial vorticity is also observed to increase gradually with downstream distance. A full Reynolds stress turbulence model with a second order upwind differencing scheme is used to compute the vortex in the near-field. Vortex structure and trajectory correlate well with experiment. It is thought that the dissipative nature of the second order convection scheme led to discrepancies between numerical and experimental results.",
author = "O'Regan, {Miche{\'a}l S.} and Griffin, {Philip C.} and Gary Mcnicholas and Young, {Trevor M.}",
year = "2012",
doi = "10.2514/6.2012-3331",
language = "English",
isbn = "9781624101854",
series = "30th AIAA Applied Aerodynamics Conference 2012",
publisher = "American Institute of Aeronautics and Astronautics Inc.",
pages = "2415--2422",
booktitle = "30th AIAA Applied Aerodynamics Conference 2012",
note = "30th AIAA Applied Aerodynamics Conference 2012 ; Conference date: 25-06-2012 Through 28-06-2012",
}