An experimental investigation of apex fence flaps on delta wingsThe effects on leading edge vortex formation produced by apex fences mounted on two delta wings were examined in a subsonic wind tunnel. Pressure data were collected on the upper surface of the test wings and oil flow and bubble flow visualizations were performed. The deflections studied were 74, 90 and 65 deg in one-sided and two-sided configurations. Full span and semi-span delta wing planforms were used. Relatively small, symmetrically deployed apex fences provided enhanced upper surface suction which, in some angle-of-attack situations, could lead to a pitch-up force. Asymmetrically-deployed fences showed promise for yaw control at high angles of attack, althouh the force effectiveness has yet to be quantified.
Document ID
19860026289
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Vess, R. J. (North Carolina State University Raleigh, United States)
Wahls, R. A. (North Carolina State Univ. Raleigh, NC, United States)
Moskovitz, C. A. (North Carolina State Univ. Raleigh, NC, United States)