Circulation Control as a Roll Effector for Unmanned Combat Aerial Vehicles

Hoholis, George, Steijl, Rene and Badcock, Ken (2016) Circulation Control as a Roll Effector for Unmanned Combat Aerial Vehicles. Journal of Aircraft, 53 (6). pp. 1875-1889. (In Press)

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Abstract

his paper reports on a numerical investigation of the use of trailing-edge circulation control as a roll effector on a generic unmanned combat aerial vehicle: the DLR-F19 stability and control configuration. The Coanda effect induced by fluidic injections at the trailing edge of a wing is used to increase circulation and generate lift. Reynolds-averaged Navier–Stokes predictions are validated against wind-tunnel experiments conducted at the Georgia Institute of Technology and NASA’s basic aerodynamic research tunnel on an airfoil employing trailing-edge circulation control. Two turbulence models are used: the Wilcox k-ω model and Menter’s shear-stress transport, showing that the Wilcox k-ω model provides the best comparisons with the experimental data. Baseline data for the stability and control configuration with conventional control surfaces from wind-tunnel experiments done at the low speed wind-tunnel owned by the German- Dutch Wind Tunnels foundation (DNW-NWB) are used to ensure the correct flow features are being modeled for the flows encountered by this type of unmanned combat aerial vehicle and to provide a comparison for the performance of the circulation control devices. Modifications have been made to the DLR-F19, replacing the conventional control surfaces with trailing-edge circulation control of the same spanwise extent. This includes two configurations: one with a single slot, and one with three slots of equal width along the wing. The circulation control performs well at low angles of attack, producing a similar roll moment to the conventional control surfaces. Due to the flow separation at the high angles of attack, the circulation control is unable to generate a rolling moment. Finally, the flow topology is examined to understand the causes of the decrease in the performance.

Item Type:	Article
Subjects:	?? TL ?? ?? U1 ??
Depositing User:	Symplectic Admin
Date Deposited:	15 Mar 2016 17:21
Last Modified:	16 Dec 2022 06:17
DOI:	10.2514/1.C033642
Related URLs:	Author Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/2054240

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• Circulation Control as a Roll Effector for Unmanned Combat Aerial Vehicles. (deposited 15 Mar 2016 17:21) [Currently Displayed]