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Computational Investigation of Mach number and angle of Attack Effects on the Flow Pattern over a 60º Delta Wing
Steady flows over a 60º delta wing with sharp leading edge are computationally studied at different angles of attack and Mach numbers. Flow patterns over the upper surface of a delta wing are classified into six types based on the component of angle of attack normal to the leading edge  and component of Mach number normal to the leading edge MN. Flow patterns over the delta wing studied in this research are compared to known patterns of previous studies and their variations with free-stream Mach number and angle of attack are investigated. Visualization results obtained by numerical simulations show that a leading edge vortex is formed on the upper side of the wing with or without the presence of the secondary separation which gradually expands and becomes closer to the wing surface with increasing Mach number. At Mach numbers higher than 1.2, the leading edge becomes supersonic and the expansion wave emanating from the leading edge accelerates the flow. At this condition, shock waves are formed on the wing which interact the vortices. With increasing angle of attack, the vortex gets away from the wing and closer to the shock wave. The effects of free-stream Mach number and angle of attack on the location of vortex breakdown are also studied.
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[8] Brodetsky M. D., E. Krause, S. B. Nikiforov, A. A. Pavlov, A. M. Kharitonov, A. M. Shevchenko. “Evolution of Vortex Structures on Leeward Side of a Delta Wing.” Journal of Applied Mechanics and Technical Physics 42 (2), 2001, pp. 243-254.
[9] Imai G., K. Fujii, A. Oyama. “Computational Analyses of Supersonic Flows over a Delta Wing at High Angles of Attack.” 25th International Congress of the Aeronautical Sciences (ICAS), 2006.
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[11] Younis Y., A. Bibi, A. U. Haque, S. Khushnud. “Vortical Flow Topology on Windward and Leeward Side of Delta Wing at Supersonic Speed.” Journal of Applied Fluid Mechanics 2 (2), 2009, pp. 13-21.
[12] Oyama A., M. Ito, G. Imai, S. Tsutsumi, N. Amitani, K. Fujii. “Mach Number effect on Flow Field over A delta Wing in Supersonic Region”, 46th AIAA Aerospace Sciences Meeting and Exhibit, Reno, Nevada, 2008.
[13] Gursul, Ismet. “Recent Developments in Delta Wing Aerodynamics.” The Aeronautical Journal, 2004, pp. 437-452.
دوره 3، شماره 2 - شماره پیاپی 2
اصل مقاله 4.43 MB
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هادی‌دولابی, مصطفی, & انصاریان, حسین. (1393). بررسی عددی اثر عدد ماخ و زاویة حمله بر الگوی جریان روی بال مثلثی 60 درجه. دانش و فناوری هوافضا, 3(2), 19-33.
مصطفی هادی‌دولابی; حسین انصاریان. "بررسی عددی اثر عدد ماخ و زاویة حمله بر الگوی جریان روی بال مثلثی 60 درجه". دانش و فناوری هوافضا, 3, 2, 1393, 19-33.
هادی‌دولابی, مصطفی, انصاریان, حسین. (1393). 'بررسی عددی اثر عدد ماخ و زاویة حمله بر الگوی جریان روی بال مثلثی 60 درجه', دانش و فناوری هوافضا, 3(2), pp. 19-33.
هادی‌دولابی, مصطفی, انصاریان, حسین. بررسی عددی اثر عدد ماخ و زاویة حمله بر الگوی جریان روی بال مثلثی 60 درجه. دانش و فناوری هوافضا, 1393; 3(2): 19-33.