Aerodynamic Load Reduction on a Supercritical Airfoil Using Tilted Microjets

Microjets arranged on the wing surfaces of civil transport aircraft have been shown to great potential in suppressing high-frequency gust loads. This paper presents a study aerodynamic load reduction supercritical airfoil using tilted microjets by solving Reynolds-averaged Navier-Stokes (RANS) equations. The numerical method was first validated against experimental and previous data. Afterward, subsonic transonic flowfields around were simulated with various angled microjets. results show that both lift power efficiencies significantly increase as blowing direction shifts downstream upstream. movement weakening shock due jet are observed at α > 2 ∘ flow, resulting drag compared baseline airfoil. However, transient revealed upstream induces strong vortex shedding, which is suppressed flows. During deployment, there three distinct phases: time lag, rolling-up, rebalancing, order. Once it reaches trailing edge flows, starting rapidly modifies induced roll-up from pressure surface. Nevertheless, rebalancing stage contributes greater additional effect.