주기변동하는 합성입구유동이 난류경계층에 미치는 영향
Effects of Oscillating Synthetic Inflow on Turbulent Boundary Layer
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Large eddy simulation (LES) has been popularly applied and used in the last several decades to implement the atmospheric environment of a turbulent boundary layer in the numerical domain. One of its representative applications would be the development of wind turbines and farms under the turbulent boundary layer. A fully developed turbulent boundary layer is also applied to predict the flow around the wake behind bluff bodies such as wind turbines and aerodynamic structures. In this study, we aimed to generate an artificial turbulent boundary layer in the numerical domain, which can be made by a synthetic method of inflow generation. In order to get an appropriate, well-developed boundary layer in a three-dimensional domain, this generation method has been coupled with oscillating flow, which was expected to make faster convergence in the calculation. To make an effective flow analysis, a hexahedral mesh was been and Cholesky decomposition was applied to possess turbulent statistics such as the randomness and correlation of turbulent flow. As a result, the flow characteristics in the domain are very close to the calculation without the oscillating flow.
Abstract
Large eddy simulation (LES) has been popularly applied and used in the last several decades to implement the atmospheric environment of a turbulent boundary layer in the numerical domain. One of its representative applications would be the development of wind turbines and farms under the turbulent boundary layer. A fully developed turbulent boundary layer is also applied to predict the flow around the wake behind bluff bodies such as wind turbines and aerodynamic structures. In this study, we aimed to generate an artificial turbulent boundary layer in the numerical domain, which can be made by a synthetic method of inflow generation. In order to get an appropriate, well-developed boundary layer in a three-dimensional domain, this generation method has been coupled with oscillating flow, which was expected to make faster convergence in the calculation. To make an effective flow analysis, a hexahedral mesh was been and Cholesky decomposition was applied to possess turbulent statistics such as the randomness and correlation of turbulent flow. As a result, the flow characteristics in the domain are very close to the calculation without the oscillating flow.
참고문헌 (16)
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