Influence of Strake Wing on Unsteady Characteristics of an Aircraft Undergoing Lateral Motions
Publication: Journal of Aerospace Engineering
Volume 28, Issue 4
Abstract
In this paper, the influences of strake wing on unsteady characteristics of aircraft at high angle of attack during rolling oscillation, yawing oscillation, and coupled motion at different frequencies is investigated by using a forced oscillation test rig. The experiments include dynamic force and flow field measurements. As the results show, the rolling moments are affected by the vortices generated by the strake wing. The rolling moment is large and shows strong hysteresis both in the rolling and yawing oscillations. The value of the rolling moment coefficient is small in the coupled motion. The change of the rolling moment is related to the unsteady development of the strake vortices. The characteristics are almost the same for the yawing moment, which may mainly be affected by the sideslip angle. This paper is for the aerodynamic configuration design and the flight control design using flow control method.
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References
Cunningham, A. M., Jr., and den Boer, R. G. (1990). “Low-speed un-steady aerodynamics of a pitching straked wing at high incidence—Part II: Harmonic analysis.” J. Aircr., 27(1), 31–41.
DaVis 7.2 [Computer software]. LaVision Company, Germany.
Ericsson, L. E. (1996b). “Effect of pitch rate on delta wing vortex characteristics.” AIAA 1996-3405, 21st Atmospheric Flight Mechanics Conf., San Diego, CA.
Ericsson, L. E. (1996a). “Difficulties in predicting vortex breakdown effects on a rolling delta wing.” J. Aircr., 33(3), 477–484.
Ericsson, L. E. (1996c). “Pitch rate effect on delta wing vortex breakdown.” J. Aircr., 33(3), 639–642.
Ericsson, L. E. (1998). “Nonlinear unsteady aerodynamics of pitching delta wings.” AIAA 1998-2518, 16th AIAA Applied Aerodynamics Conf., Albuquerque, NM.
Herbst, W. B. (1980). “Future fighter technologies.” J. Aircr., 17(8), 561–566.
Herbst, W. B. (1983). “Dynamics of aircraft combat.” J. Aircr., 20(7), 594–598.
Huang, D., and Wu, G. X. (2005). “Experiment on fighter oscillating in large amplitude yaw-roll motion.” J. Nanjing Univ. Aeronaut. Astronautics, 37(4), 408–411 (in Chinese).
Jarrah, M. A. (1989). “Low speed wind tunnel investigation of flow about delta wings oscillating in pitch to very high angle of attack.” AIAA 1989-0295, AIAA 27th Aerospace Sciences Meeting, Reno, Nevada.
Nelson, R. C., and Pelletier, A. (2003). “The unsteady aerodynamics of slender wings and aircraft undergoing large amplitude maneuvers.” Prog. Aerosp. Sci., 39(2–3), 185–248.
Quast, T., Nelson, R. C., and Fisher, D. F. (1991). “A study of high alpha dynamics and flow visualization for a 2.5% model of the F-18 HARV undergoing wing rock.” AIAA 1991-3267, 9th AIAA Applied Aerodynamics Conf., Baltimore, MD.
Rockwell, D. (1993). “Three dimensional flow structure on delta wings at high angle-of-attack: Experimental concepts and issues.” AIAA 1993-0550, AIAA 31st Aerospace Sciences Meeting, Reno, NV.
Shi, Z. W., Bin, B., Li, G. N., and Ming, X. (2004). “Dynamic pressure measurements on a delta wing in unsteady free stream.” Exp. Meas. Fluid Mech., 18(4), 83–87 (in Chinese).
Shi, Z. W., Fu, C., and Ming, X. (2005). “Experiment on pitching delta wing in unsteady free stream.” J. Nanjing Univ. Aeronaut. Astronaut., 37(4), 412–416 (in Chinese).
Shi, Z. W., and Ming, X. (2008). “Effects of unsteady freestream on aerodynamic characteristics of pitching delta wing.” J. Aircr., 45(6), 2182–2185.
Tang, M. Z. (1999). “PIV measurement of unsteady flow field about a rocking wing.” ACTA Aerodyn. Sin., 17(3), 271–278 (in Chinese).
Tang, M. Z. (2000). “Quantitative flow visualization on unsteady flow fields of wing rock.” Exp. Meas. Fluid Mech., 14(2), 61–66 (in Chinese).
Tang, M. Z., Li, Z. F., Yu, W. Y., and Fan, J. C. (1994). “Low-speed wind-tunnel investigation of flow about delta wing, oscillating in pitch to very high angle of attack.” ACTA Aerodyn. Sin., 12(4), 367–374 (in Chinese).
Tang, M. Z., Zhang, W., and He, H. L. (2001). “Experimental investigation on unsteady flow field about a coupled pitching-rolling delta wing.” ACTA Aerodyn. Sin., 197(1), 47–55 (in Chinese).
Williams, D. L., II, Nelson, R. C., and Fisher, D. F. (1994). “An investigation of the X-31 roll characteristics at high angle-of-attack through subscale model testing.” AIAA 1994-0806, AIAA 32nd Aerospace Sciences Meeting & Exhibit, Reno, NV.
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Published In
Journal of Aerospace Engineering
Volume 28 • Issue 4 • July 2015
Copyright
© 2014 American Society of Civil Engineers.
History
Received: Nov 1, 2013
Accepted: May 13, 2014
Published online: Aug 7, 2014
Discussion open until: Jan 7, 2015
Published in print: Jul 1, 2015
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