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고 받음각 ONERA 70도 삼각날개 와류 유동의 압력 섭동 분석
손미소(M. S. Son),사정환(J. H. Sa),박수형(S. H. Park),변영환(Y. H. Byun) 한국전산유체공학회 2015 한국전산유체공학회지 Vol.20 No.2
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.