Active flow control (AFC) was incorporated into the Stability And Control CONfiguration model (SACCON) in order to trim it in pitch. The combination of AFC and traditional control surfaces enables the model to be stable and controllable. The model can be trimmed in pitch, provided that the significance of AFC is considered to be on par with other parameters affecting the aerodynamic characteristics of a wing. The most important outcome of this exercise implies that the traditional boundary-layer approach with inviscidly determined pressure distributions should no longer be used when AFC is to be implemented. This concept is proven by way of examples associated with the SACCON model that can be trimmed either by large deflection of flaps or by AFC. Proper combination of both parameters requires a minimal input of AFC (e.g., two actuators) in conjunction with a small flap deflection. Thus far, an actuator array located near the flap hinge was most effective but this result may not be universal. Tests were carried out at low speeds (i.e., at Mach number < 0.2) and Reynolds numbers based on the outer panel chord of the model that approached 106.
ASJC Scopus subject areas
- Aerospace Engineering