Numerical Evaluation of Main Rotor Pylon Flowfields on the RAH-66 Comanche Helicopter

Steady-State and unsteady Reynolds-Averaged Navier-Stokes computations were used to evaluate main rotor pylon flowfields on the RAH-66 Comanche Helicopter. The computations were used in conjunction with wind tunnel and flight test experiments and focused on the effect of flow control devices and vehicle contours on tail buffet. The computations helped to give further insight into the phenomenological behavior of the flow control device.