대한기계학회:학술대회논문집 (Proceedings of the KSME Conference)
- 대한기계학회 2003년도 추계학술대회
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- Pages.556-561
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- 2003
가속익의 비정상 공력특성에 관한 연구
A Study of Unsteady Aerodynamic Characteristics of an Accelerating Aerofoil
- Lee, Young-Ki ;
- Kim, Heuy-Dong ;
- Raghunathan, Srinivasan (School of Aeronautical Engineering, The Queen's University of Belfast)
- 발행 : 2003.11.05
초록
Flight bodies are subject to highly unstable and severe flow conditions during taking-off and landing periods. In this situation, the flight bodies essentially experience accelerating or decelerating flows, and the aerodynamic characteristics can be completely different from those of steady flows. In the present study, unsteady aerodynamic characteristics of an aerofoil accelerating at subsonic speeds are investigated using a computational method. Two-dimensional, unsteady, compressible Navier-Stokes simulations are conducted with a one-equation turbulence model, Spalart-Allmaras, and a fully implicit finite volume scheme. An acceleration factor is defined to specify the unsteady aerodynamics of the aerofoil. The results show that the acceleration of the subsonic aerofoil generally leads to a variation in aerodynamic characteristics and it is more significant at angles of attack.
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