Experiment on jet–vortex interaction for variable mutual spacing

The interaction of a line vortex with collinearly aligned jet is prototypical configuration for various important applications in aeronautics. purpose this study to analyze the impact flow on kinematics and dynamics trailing vortex. A particular emphasis effect variable relative jet–vortex spacing. To end, we realized four different configurations wind tunnel experiment at chord-based Reynolds number [Formula: see text] using high-speed stereo particle image velocimetry measurements five transversal planes located between 2 26 chords behind wing. Stochastic analyses reveal that generally contributes an external excitation as function mutual Compared without jets, amplification increases upon reducing Most notably, all but closest spacing, response qualitatively same, changing mainly magnitude. For however, considerably different, which suspect be consequence entrainment. Proper orthogonal decomposition reveals, first time, tends excite progressively broader range modes spacing reduced. close examination mean seems preclude linear instabilities, while characteristics hint toward some form receptivity mechanism disturbances being free stream. Our are useful validate simulation tools combining simultaneous lift thrust effects.