Effect of Roll Angle Configurations of a Reverse Delta Type Add-on Device on Wing Tip Vortex Alleviation
DOI:
https://doi.org/10.37934/cfdl.16.4.120133Keywords:
Add-on device, Vortex, PIV, Wing tipAbstract
An add-on device in the shape of a reverse delta has shown the ability to alleviate wake vortices. The present work studies the interaction of the wing tip vortex and the reverse delta type add-on device vortices. This paper looks at the vortex interactions generated downstream of the wing tip in planes perpendicular to the free stream direction and their dependence on roll angles φ at a mean chord-based Reynolds number of Rec=2.75×105. The study reveals that the add-on device causes a reduction in the tangential velocity V and vorticity of the resultant vortex by up to 44.1% and 59.4%, respectively. Also, it is found that the resultant vortex core radius increased by 305%. The results indicate that the reverse delta type add-on device implants countersign vorticity into the wing tip vortex and modifies its roll-up process.
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Babie, B.M. and Nelson, R.C., “Flow visualization study of far-field wake vortex interactions”, Proceedings of 11th International Symposium on Flow Visualization, Paper No. 11ISFV-103, August 2004.
Veillette Patrick R. “Data show that U.S. Wake-Turbulence Accidents are most Frequent at Low Altitude and During Approach and Landing,” Flight Safety Foundation, Flight Safety Digest, March – April 2002, pp. 1-56. https://flightsafety.org/fsd/fsd_mar-apr02.pdf
Rossow Vernon. J. “Effect of Wing Fins on Lift-Generated Wakes,” Journal of Aircraft, Vol. 15, No. 3, 1978, pp. 160-167. https://doi.org/10.2514/3.58335
Schell, I., E. Özger, and D. Jacob. “Influence of different flap settings on the wake-vortex structure of a rectangular wing with flaps and means of alleviation with wing fins”, Aerospace Science and Technology, Vol. 4, No. 2, 2000, pp. 79–90. https://doi.org/10.1007/978-3-540-45466-3_9
Ozger, E., I. Schell, and D. Jacob. “On the Structure and Attenuation of an Aircraft Wake,” Journal of Aircraft, Vol. 38, No. 5, 2001, pp. 878–887. https://doi:10.2514/2.2847
Heyes, A. L., and D. A. R. Smith. “Spatial perturbations of a wing-tip vortex using pulsed span-wise jets”, Experiments in Fluids, Vol. 37, No. 1, 2004, pp. 120–127. https://doi.org/10.1007/s00348-004-0791-5
Schöll, Robert, Christian Buxel, and Günther Neuwerth. “Influence of spanwise loading and fins on extended near-field vortex wake”, 44th AIAA Aerospace Sciences Meeting and Exhibit, Aerospace Sciences Meetings, 2006. doi: 10.2514/6.2006-62. https://doi.org/10.2514/6.2006-62
Ortega, J. M., R. L. Bristol, and O. Savas. “Wake alleviation properties of triangular-flapped wings”, AIAA Journal, Vol. 40, No. 4, 2002, pp. 709–721. https://doi.org/10.2514/2.1703
Ortega, J. M., R. L. Bristol, and Ö. Savaş. “Experimental study of the instability of unequal-strength counter-rotating vortex pairs”, Journal of Fluid Mechanics, Vol. 474, 2003, pp. 35–84. https://doi.org/10.1017/S0022112002002446
Breitsamter, C. "Wake vortex characteristics of transport aircraft." Progress in Aerospace Sciences, 47(10), 2011, pp. 89-134. https://doi.org/10.1016/j.paerosci.2010.09.002
Bellastrada, C., and C. Breitsamter. “Effect of differential flap settings on the wake vortex evolution of large transport aircraft”, Notes on Numerical Fluid Mechanics and Multidisciplinary Design, Vol. 92, 2006, pp. 25–32. https://doi.org/10.1007/978-3-540-33287-9_4
Coustols, Eric, Eike Stumpf, Laurent Jacquin, Frédéric Moens, Heinrich Vollmers, and Thomas Gerz. “Minimised wake: A collaborative research programme on aircraft wake vortices”, 41st AIAA Aerospace Sciences Meeting and Exhibit, 2003, pp. 1-15. https://doi.org/10.2514/6.2003-938
Elsayed, Omer A., Waqar Asrar, Ashraf A. Omar, and Kijung Kwon. “Influence of differential spoiler settings on the wake vortex characterization and alleviation”, Journal of Aircraft, Vol. 47, No. 5, 2010, pp. 1728-1738. https://doi.org/10.2514/1.C000258
Elsayed, Omer A., Ashraf A. Omar, Waqar Asrar, and Kijung Kwon. “Effect of differential spoiler settings (DSS) on the wake vortices of a wing at high–lift-configuration (HLC)”, Journal of Aerospace Science and Technology, Vol. 15, No. 7, 2011, pp. 555-566. https://doi.org/10.1016/j.ast.2010.11.001
Lee, T., and Y. Y. Su. “Wingtip vortex control via the use of a reverse half-delta wing”, Experiments in Fluids, Vol. 52, No. 6, 2012, pp. 1593-1609. https://doi.org/10.1007/s00348-012-1274-8
Altaf, Afaq, Tan Boon Thong, Ashraf A. Omar, and Waqar Asrar. “Influence of a Reverse Delta Type Add-on Device on Wake Vortex Alleviation.” AIAA Journal, Vol. 54, No. 2, 2016, pp. 625-636. https://doi.org/10.2514/1.J054436
Altaf, Afaq, Tan Boon Thong, Ashraf Ali Omar, and Waqar Asrar. “Impact of a Reverse Delta Type Add-on Device on the Flap-tip Vortex of a Wing”, International Journal of Aviation, Aeronautics, and Aerospace, Vol. 3, No. 3, Art. 12, 2016, pp. 1-26. https://doi.org/10.58940/2374-6793.1126
Altaf, Afaq. “Wingtip Vortex Alleviation Using a Reverse Delta Type Add-on Device”, International Journal of Aviation, Aeronautics, and Aerospace, Vol. 4, No. 3, Art. 7, 2017, pp. 1-28. https://doi.org/10.15394/ijaaa.2017.1178
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