시뮬레이션 시간 단계에 따른 FOWT 서지방향 항력계수 결정에 관한 CFD해석 연구
CFD Analysis for Determining Surge-direction Drag Coefficient of FOWT based on Simulation Time Step
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초록
In this study, the effect of the time step specified in a computational fluid dynamics (CFD) simulation on load responseis analyzed and the drag coefficients of the floating body of floating offshore wind turbines (FOWTs) are estimated. By evaluating theerror in the FOWT load response and the change in the drag-coefficient values based on the density of the time intervals, this studyaims to establish a time-interval setting that minimizes the time and cost of CFD simulations for selecting drag-coefficient values. Practical CFD utilization strategies necessary for the calibration of medium-to high-fidelity analysis tools are presented. Based on acomparative analysis of CFD simulations conducted at various time intervals, the results confirmed that under a certain time intervalthat sufficiently considers various factors, the accuracy of the FOWT response with respect to density shows minimal differences,thereby providing an efficient utilization method for CFD simulations in FOWT design and analysis.
Abstract
In this study, the effect of the time step specified in a computational fluid dynamics (CFD) simulation on load responseis analyzed and the drag coefficients of the floating body of floating offshore wind turbines (FOWTs) are estimated. By evaluating theerror in the FOWT load response and the change in the drag-coefficient values based on the density of the time intervals, this studyaims to establish a time-interval setting that minimizes the time and cost of CFD simulations for selecting drag-coefficient values. Practical CFD utilization strategies necessary for the calibration of medium-to high-fidelity analysis tools are presented. Based on acomparative analysis of CFD simulations conducted at various time intervals, the results confirmed that under a certain time intervalthat sufficiently considers various factors, the accuracy of the FOWT response with respect to density shows minimal differences,thereby providing an efficient utilization method for CFD simulations in FOWT design and analysis.
참고문헌 (14)
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