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Journal of the Korea Institute of Military Science and Technology 2007;10(4):12-19.
Nonlinear Flow-Induced Vibration Analysis of Typical Section in Supersonic and Hypersonic Flows with Angle-of-Attack Effect
Dong-Hyun Kim, Yu-Sung Kim, Myung-Hoon Yoon
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받음각 효과를 고려한 발사체 날개단면의 초음속극초음속 비선형 유체유발진동해석
김동현, 김유성, 윤명훈
1국립경상대학교 기계항공공학부 및 항공기 부품연구소
2국립경상대학교 기계항공공학부
Abstract
In this study, nonlinear flow-induced vibration(flutter) analyses of a 2-DOF launch vehicle airfoil have been conducted in supersonic and hypersonic flow regimes. Advanced aeroelastic analysis system based on computational fluid dynamics and computational structural dynamics is successfully developed and applied to the present analyses. Nonlinear unsteady aerodynamic analyses considering strong shock wave motions are conducted using inviscid Euler equations. Aeroelastic governing equations for the 2-DOF airfoil system is solved by the coupled integration method with interactive CFD and CSD computation procedures. Typical wedge type airfoil shapes with initial angle-of-attacks are considered to investigate the nonlinear flutter characteristics in supersonic(15). Also, the comparison of detailed aeroelastic responses are practically presented as numerical results.
Key Words: Supersonic, Hypersonic, Flow-Induced Vibration, Wedge Airfoil, Coupled-Time Integration, Dynamic Moving Grid, Fluid-Structure Integration
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