ANALYSIS OF HYDRODYNAMIC CHARACTERISTICS OFOFFSHORE WIND TURBINE SINGLE-PILE FOUNDATION UNDER WAVE-CURRENT COUPLING

Huang Fei; Zhu Renqing; Liu Hongzang; Qin Ya; Sun Ke; Ji Renwei

doi:10.19912/j.0254-0096.tynxb.2023-2096

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Acta Energiae Solaris Sinica ›› 2025, Vol. 46 ›› Issue (4) : 485-493. DOI: 10.19912/j.0254-0096.tynxb.2023-2096

ANALYSIS OF HYDRODYNAMIC CHARACTERISTICS OFOFFSHORE WIND TURBINE SINGLE-PILE FOUNDATION UNDER WAVE-CURRENT COUPLING

Huang Fei¹, Zhu Renqing¹, Liu Hongzang¹, Qin Ya², Sun Ke³, Ji Renwei¹

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Abstract

Addressing the nonlinear hydrodynamics challenge where traditional potential flow theory fails to account for wave-current coupling and its interaction with structures, a numerical model for wave-current coupling was developed specifically for a single-pile foundation （SPF）. The high-precision Detached-Eddy Simulation （DES） method was employed to simulate the flow field, facilitating a more accurate analysis of the hydrodynamic characteristics of the SPF under varying wave and current parameters. The results show that: 1） The maximum horizontal wave force increases linearly with the increase of wave steepness under no current velocity, while the non-dimensional wave force decreases with the increase of wave steepness. 2） When the wave and current are in the same direction, the valley value of the wave force increases more significantly than the peak value with the increase of the velocity. However, the phase difference at the peak value is more obvious than that at the valley value. When the wave and current is reversed, the peak decreasing trend and phase difference of the wave force are more distinct, and the peak pressure changes little with the velocity. 3） The wave force decreases with the growth of the wave period, and compared to the same wave height growth rate, the impact of period changes on wave force is more prominent. 4） In the process of flow around the SPF, there will be breaking phenomenon of waves and symmetrical vortices on both sides of the SPF. The flow around the pile also leads to the accumulation of high water level in front of the pile, resulting in a slightly jagged wave force curve.

Key words

single-pile foundation of wind turbine / detached-eddy simulation / wave-current coupling / phase difference / hydrodynamic characteristics / wave force

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Huang Fei, Zhu Renqing, Liu Hongzang, Qin Ya, Sun Ke, Ji Renwei. ANALYSIS OF HYDRODYNAMIC CHARACTERISTICS OFOFFSHORE WIND TURBINE SINGLE-PILE FOUNDATION UNDER WAVE-CURRENT COUPLING[J]. Acta Energiae Solaris Sinica. 2025, 46(4): 485-493 https://doi.org/10.19912/j.0254-0096.tynxb.2023-2096

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