Wake vortex behind an aircraft would introduce great hazard to the following aircraft and threaten to the flight
safety. Generic model using two rectangular airfoils was employed for generating wake vortex system to
investigate the method of wake vortex alliviation. The investigation was carried out in a water towing tank equipt
with Particle Image Velocimetry system. Characteristics of double-vortex flow were analyzed for selected cases,
proving that the intensity of the vortex is reduced with respect to the interaction between the wake vortices. The
study exhibited that the R-L instability was most effectively triggered with parameter combinations of α1=10°,
α2=8°and b=50mm respectively. As a result, the circulation of the wake vortices was alleviated by nearly 40%
accordingly.
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