A Computational Study of Inlet Turbulence on Delta Wing Flow
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Abstract
Effect of turbulence flow to dynamic characteristic of high sweep-back angle Delta wing was performed in subsonic flow. Numerical method (SIM), based on CFD methods using ANSYS/FLUENT software, was carried out to study this phenomenon. At low Reynolds number, air velocity 2.5m/s, Delta wing was investigated with a range of attack angle from 0 to 40° within three cases of turbulent intensity, which varied from 0.5% to 15% due to parameter of square grid. Decay of turbulence intensity with and without grid was considered. Change of dynamic characteristic of Delta wing caused by different change of turbulence intensity at inlet flow was also observed. Finally, interaction between turbulent flow and vortex on upper wing was clarified.
Keywords
Turbulent effect, delta wing, vortices, ansys fluent, square grid
Article Details
References
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[3] R.C. Nelson, A. Pelletier, Unsteady aerodynamics of slender wings and aircraft undergoing large amplitude maneuvers, Progress Aerospace Sciences, 39 (2003) 185-248.
[4] M. Jones et al., Criteria for Vortex Breakdown above High-sweep Delta wings, AIAA Jounal Vol 47, No.10, 2009.
[5] J.O. Hinze, Turbulence, $2^{nd}$ Edition, McGraw-Hill. New York, 1975.
[6] A.E. Washburn, The effect of Freestream Turbulence on the Vortical Flow over a Delta Wing, M.S. Thesis, George Washington Univ, Washington, DC, 1990.
[7] S. Laizet, J.C. Vasslicos, DNS of Fractal-Generated Turbulence, Flow Turbulence Combust, 73 (2011) 673-705.
[8] Wang et al, Turbulent intensity and Reynolds number effects on an airfoil at low Reynolds numbers, Physics of Fluids 26 (2014) 107-115.
[9] T.K.D. Hoang, P.K. Nguyen, Y. Nakamura, High Swept-back Delta Wing Flow, Advanced Materials Research, 1016 (2014) 377-382.
[10] P.K. Nguyen, D.T. Tran, K. Mori, T.K.D. Hoang. M.T. Do, Turbulent Flow effects on High Sweep-Back Angle Delta Wing at low Reynolds number. Proceeding of 7th International Conference on Mechanical and Aerospace Engineering. Part 1, pp. 320-321, London, 2016.