Aspect ratio and combined installation in fluidic oscillator-crossflow interactions

This paper describes a computational study of fluidic oscillator-crossflow interactions. Fluidic oscillators are high potential active flow control devices, which offer promise for cooling and separation. Previous experimental studies have investigated the internal/external fields oscillators. improved understanding three-dimensional fields; however, this has been limited to single aspect ratio nozzles in variable installations. Research not analyzed effects varying both oscillator parameters installation conditions. Therefore, present aim is enhance field by examining three (AR) default perpendicular condition “skewed incline” configuration (β = 60°, α 75°). An unsteady Reynolds averaged Navier Stokes model was validated with prior data then used evaluate time-averaged time-accurate at different blowing ratios. Strouhal number analysis uncovers effectiveness parametric changes. Internal presented, identifying key differences similarities. External regard spreading angles 55°–65° observes greater wall-normal penetration lower AR spanwise larger AR's. The combined produces stronger primary vortices, improving along wall, while inclination keeps vortices close wall. Oscillator dependent on application.