RT Conference Proceedings
T1 Nonlinear evolution of harmonically forced perturbations on a wingtip vortex
A1 García-Ortiz, José Hermenegildo
A1 Parras-Anguita, Luis
A1 Diamessis, Peter
A1 Del-Pino-Peñas, Carlos Manuel
K1 Mecánica de fluidos
AB Wingtip vortices are created by flying airplanes due to lift generation. The vortex interaction with the trailing aircraft has sparked researchers’ interest to develop an efficient technique to destroy these vortices. Different models have been used to describe the vortex dynamics and they all show that, under real flight conditions, the most unstable modes produce a very weak amplification. Another linearinstability mechanism that can produce high energy gains in short times is due to the non-normality of the system. Recently, it has been shown that these non-normal perturbations also produce this energy growth when they are excited with harmonic forcing functions.In this study, we analyze numerically the nonlinear evolution of a spatially, pointwise and temporally forced perturbation, generated by a synthetic jet at a given radial distance from the vortex core. This type of perturbation is able to produce high energy gains in the perturbed base flow (10^3), and is also a suitable candidate for use in engineering applications. The flow field is solved for using fully nonlinear three-dimensional direct numerical simulation with a spectral multidomain penalty method model. Ournovel results show that the nonlinear effects are able to produce locally small bursts of instability that reduce the intensity of the primary vortex.
YR 2016
FD 2016-09-19
LK http://hdl.handle.net/10630/12036
UL http://hdl.handle.net/10630/12036
LA eng
NO Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech.
DS RIUMA. Repositorio Institucional de la Universidad de Málaga
RD 24 ene 2026