Aerodynamic performance was reported to improve by up to 60% in active flow control studies, namely a single-element high-lift airfoil, a V-22 wing-nacelle combination, and wind turbine blades. Recently, SWJ actuators have been explored in several numerical and experimental studies. Historically, SWJ actuators are employed in many applications, such as windshield-washer fluid nozzles and flow-metering devices. It generates a self-induced self-sustaining oscillating jet flow field due to its interior geometric design, feedback channels, and mixing chamber, as shown in Figure 1. The 3D-URANS model that we presented here provides a computationally inexpensive yet accurate alternative to the researchers to investigate jet oscillation characteristics.įluidic actuators employed in AFC increase the momentum of the local flow field by fluid injection or suction. In addition, we confirmed that the Strouhal number is almost constant with the Mach number for the subsonic oscillating jet and has an average value of St = 0.0131. The results of our numerical model are compared with data from the literature, and a good agreement is found.

The jet oscillation frequency is predicted by analyzing velocity time histories at the actuator exit, and a linear relationship between the jet oscillation frequency and time-averaged exit nozzle Mach number is found ( f = 511.22 M + 46.618, R² = 0.97).

After a detailed mesh study, the computational domain is represented using two million hexagonal control volumes. Numerical simulations are performed for a range of mass flow rates providing flow conditions varying from incompressible to subsonic compressible flows.

The time-resolved flow field of a spatially oscillating jet emitted by a sweeping jet (SWJ) actuator is investigated numerically using three-dimensional Reynolds-averaged Navier–Stokes (3D-URANS) equations.

Extract velocity profile in tecplot 360 ex