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http://dx.doi.org/10.6112/kscfe.2015.20.2.073

NUMERICAL ANALYSIS OF PRESSURE PERTURBATION OF DELTA WING VORTEX FLOW AT A HIGH ANGLE OF ATTACK  

Son, M.S. (Dept. of Aerospace Information System Engineering, Konkuk Univ.)
Sa, J.H. (Dept. of Aerospace Information System Engineering, Konkuk Univ.)
Park, S.H. (Dept. of Aerospace Information System Engineering, Konkuk Univ.)
Byun, Y.H. (Dept. of Aerospace Information System Engineering, Konkuk Univ.)
Publication Information
Journal of computational fluids engineering / v.20, no.2, 2015 , pp. 73-80 More about this Journal
Abstract
Delayed Detached-Eddy Simulation was conducted to investigate surface pressure coefficient distribution and surface pressure fluctuation over an ONERA 70-degree delta wing at a high angle of attack. Time-averaged surface pressure distribution is directly affected by the primary vortices, whereas the pressure fluctuation is influenced by the unsteady fluctuating boundary layer over the surface. And pressure coefficient, velocity, pressure fluctuation, and turbulent kinetic energy were analyzed along the vortex core in order to investigate the process of vortex breakdown. Consequently, strong pressure fluctuations were found where the vortex breakdown was occurred at x~620 mm. The turbulent kinetic energy abruptly increased and followed after the vortex breakdown.
Keywords
Delayed Detached-Eddy Simulation(DDES); Delta wing; Vortex flow; Pressure perturbation;
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