뒷날이 잘린 2차원 수중익의 와도 흘림 주파수
Vortex Shedding Frequency for a 2D Hydrofoil with a Truncated Trailing Edge
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Vortex shedding which is the dominant feature of body wakes and of direct relevance to practical engineering problems, has beenintensively studied for flows past a circular cylinder. In contrast, vortex shedding from a hydrofoil trailing edge has been studied tomuch less extent despite numerous practical applications. The physics of the problem is still poorly understood. The present study dealswith Kármán vortex shedding from a truncated trailing-edge hydrofoil in relatively high Reynolds number flows, . The objectives of thispaper are twofold. First, we aim to simulate unsteady turbulent flows past a two dimensional hydrofoil through a hybrid particle-meshmethod and penalization method. The vortex-in-cell (VIC) method offers a highly efficient particle-mesh algorithm that combinesLagrangian and Eulerian schemes, and the penalization method enables to enforce body boundary conditions by adding a penalty termto the momentum equation. The second purpose is to investigate shedding frequencies of vortices behind a NACA 0009 hydrofoiloperating at a zero angle of attack.
Abstract
Vortex shedding which is the dominant feature of body wakes and of direct relevance to practical engineering problems, has beenintensively studied for flows past a circular cylinder. In contrast, vortex shedding from a hydrofoil trailing edge has been studied tomuch less extent despite numerous practical applications. The physics of the problem is still poorly understood. The present study dealswith Kármán vortex shedding from a truncated trailing-edge hydrofoil in relatively high Reynolds number flows, . The objectives of thispaper are twofold. First, we aim to simulate unsteady turbulent flows past a two dimensional hydrofoil through a hybrid particle-meshmethod and penalization method. The vortex-in-cell (VIC) method offers a highly efficient particle-mesh algorithm that combinesLagrangian and Eulerian schemes, and the penalization method enables to enforce body boundary conditions by adding a penalty termto the momentum equation. The second purpose is to investigate shedding frequencies of vortices behind a NACA 0009 hydrofoiloperating at a zero angle of attack.
참고문헌 (13)
- 안병권, "날개 명음소음에 관한 이론 및 실험 연구", 한국소음진동공학회논문집, 20(2), pp.115~121 (2010), 한국소음진동공학회
- Ausoni, P., "Turbulent Vortex Shedding from a Blunt Trailing Edge Hydrofoil", 박사, pp.2009
- Caswell, B., "Kinematics and Stress on a Surface Rest", Archive for Rational Mechanics and Analysis, 26(5), pp.385~399 (1967)
- Cocle, R., "Combining the Vortex-in-Cell and Parallel Fast Multipole Methods for Efficient Domain Decomposition Simulations", Journal of Computational Physics, 227, pp.9091~9120 (2008)
- Kim, D.H., "A Study on the Propeller Blade Singing Place of an 86, 000 ton Deadweight Crude Oil Tanker", Journal of the Society of Naval Architects of Korea, 31(3), pp.59~64 (1994)
- Kim, Y.C., "Vortex-in-Cell Method Combined with a Boundary Element Method for Incompressible Viscous Flow Analysis", International Journal of Numerical Method in Fluids, 69, pp.1567~1583 (2012)
- 이승재, "Hybrid Particle-Mesh 방법에 적합한 다중영역 방법", 한국전산유체공학회지, 19(2), pp.72~78 (2014), 한국전산유체공학회[DOI]
- Mansfield, J.R, "Towards Lagrangian large vortex simulation", Proceedings, 1, pp.49~64 (1996)
- Meyer, J., "On the Model Coefficients for the Standard and the Variational Multi-Scale Smagorinsky Model", Journal of Fluid Mechanics, 569, pp.287~319 (2006)
- Pope, S. B., "Turbulent Flows" (2000), Cambridge University Press
- Rogallo, R. S, "Numerical Simulation of Turbulent Flows", Annual Review of Fluid Mechanics, 16, pp.99~137 (1984)
- Szepessy, S., "Aspect Ratio and End Plate Effects on Vortex Shedding from a Circular Cylinder", Journal of Fluid Mechanics, 234, pp.191~217 (1992)
- Zobeiri, A., "How Oblique Trailing Edge of a Hydrofoil Reduces the Vortex-induced Vibration", Journal of Fluids and Structures, 32, pp.78~89 (2012)