@Article{fdmp.2020.012237,
AUTHOR = {Ioannis Oxyzoglou, Zheng-Tong Xie},
TITLE = {Effects of Heaving Motion on the Aerodynamic Performance of a Double-Element Wing in Ground Effect},
JOURNAL = {Fluid Dynamics \& Materials Processing},
VOLUME = {16},
YEAR = {2020},
NUMBER = {6},
PAGES = {1093--1114},
URL = {http://www.techscience.com/fdmp/v16n6/40847},
ISSN = {1555-2578},
ABSTRACT = {The broad implication of the paper is to elucidate the significance of the
dynamic heaving motion in the aerodynamic performance of multi-element
wings, currently considered as a promising aspect for the improvement of the
aerodynamic correlation between CFD, wind tunnel and track testing in race
car applications. The relationship between the varying aerodynamic forces, the
vortex shedding, and the unsteady pressure field of a heaving double-element
wing is investigated for a range of mean ride heights, frequencies, and amplitudes,
using a two-dimensional (2D) unsteady Reynolds-averaged Navier-Stokes
(URANS) approach and an overset mesh method for modelling the moving wing.
The analysis of the results shows that at high frequencies, i.e., <i>k</i> ≥ 5:94 and
amplitudes <i>a/c</i> ≥ 0:05 the interaction of the shear vorticity between the two
elements results in the generation of cohering leading and trailing edge vortices
on the flap, associated to the rapid variation of thrust and downforce enhancement.
Both the occurrence and intensity of these vortices are dependent upon the frequency,
amplitude, and mean ride height of the heaving wing. The addition of the flap significantly alters the frequency of the shed vortices in the wake and maintains the generation of downforce for longer time in ground proximity. The comparison with the
static wing provides evidence that the dynamic motion of a race car wing can be beneficial in terms of performance, or detrimental in terms of aerodynamic correlation.},
DOI = {10.32604/fdmp.2020.012237}
}