Publisher : The Korean Society for Noise and Vibration Engineering
DOI : 10.5050/KSNVE.2015.25.10.667
Title & Authors
Active Gurney Flap Design Modification for High Speed Operation and Natural Frequency Estimate Kim, Taejoo; Kim, Do-Hyung; Paek, Seung-Kil;
Working displacement variation by elastic deformation of active Gurney flap which was operated on high frequency was observed. Flap-wise natural frequency was lower than mode analysis result and hinge boundary condition was identified to be the cause through the simple modal test. Design modification for increasing natural frequency was conducted for minimizing the elastic deformation at maximum 35 Hz operating condition which was design requirement condition. Brass bushing was applied instead of rotating bearing for gap minimization and Gurney flap design modification was conducted to increase of the flap-wise natural frequency. Design modification effect was validated by natural frequency comparison with mode analysis result and modal test result of design modification model.
Active Gurney Flap;Natural Frequency;Elastic Deformation;Mode Analysis;
Van Dam, C. P., Ten, D. T. and Vijgen, P. M. H. W., 1999, Gurney Flap Experiments on Airfoils and Wings, Journal of Aircraft, Vol. 36, No. 2, pp. 484~ 486.
Maughmer, M. D. and Bramesfeld, G., 2008, Experimental Investigation of Gurney Flaps, Journal of Aircraft, Vol. 45, No. 6, pp. 2062~2067.
Lee, J., Choi, J. H. and Shin, S. J., 2011, Development of an Intelligent Active Trailing-edge Flap Rotor to Reduce Vibratory Loads in Helicopter, Proceedings of the KSNVE Annual Spring Conference, pp. 492~497.
Natarajan, B., Eun, W. J. and Shin, S. J., 2013, Enhancement of SNUF Active Trailing-edge Flap Blade Mechanism Design, Transactions of the Korean Society for Noise and Vibration Engineering, Vol. 23, No. 7, pp. 645~653.
Milgram, J., Chopra, I. and Straub, F., 1998, Rotors with Trailing Edge Flaps: Analysis and Comparison with Experimental Data, Journal of the American Helicopter Society, Vol. 43, No. 4, pp. 319~332.
Kim, D. H., Kang, H. J., Wie, S. Y. and Kim, S. H., 2013, Modeling of a Rotor System Incorporating Active Tab and Analysis of BVI Noise Reduction Characteristics, Journal of the Korean Society for Aeronautical and Space Sciences, Vol. 42, No. 11, pp. 855~864.
Kinzel, M. P., Lesieutre, G. A. and Maughmer, M. D., 2005, Miniature Trailing-edge Effectors for Rotorcraft Performance Enhancement, American Helicopter Society 61st Annual Forum, Grapevine, Tx, pp. 146~158.
Thiel, M. R., Lesieutre, G. A., Maughmer, M. D. and Koopmann, G. H., 2006, Actuation of an Active Gurney Flap for Rotorcraft Applications, 47th AIAA/ASME/ASCE/AHS/ ASC Structures, Structural Dynamics and Materials Con., Newport, Rhode Island.
Kim, S. H., 2014, Study on the Safety Enhancement of Eco-friendly Aircraft Technology, Korea Aerospace Research Institute.