OF2:耦合OpenFAST和OpenFOAM高保真的气动-液压-伺服-弹性fot仿真

IF 3.6 Q3 GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY Wind Energy Science Pub Date : 2023-10-24 DOI:10.5194/wes-8-1597-2023
Guillén Campaña-Alonso, Raquel Martín-San-Román, Beatriz Méndez-López, Pablo Benito-Cia, José Azcona-Armendáriz
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引用次数: 0

摘要

摘要浮式海上风力机的数值研究需要精确的综合仿真,综合考虑浮式海上风力机的气动、水动力、伺服和弹性响应。此外,还需要考虑浮动系统的动力学耦合,以便准确地计算系综上的激励。本文开发了一种新的工具,用于将NREL的气动伺服弹性工具OpenFAST与计算流体动力学(CFD)工具箱OpenFOAM耦合起来。考虑平台的动态响应,利用OpenFAST对转子空气动力学以及风力机各部件和控制器在每个时间步的柔性响应进行建模。使用OpenFOAM模拟了考虑风力涡轮机载荷的流体力学和平台响应。整个仿真环境称为OF2 (OpenFAST和OpenFOAM)。OC4 DeepCWind半潜式FOWT和NREL的5mw风力涡轮机在两种负载情况下使用OF2进行了模拟。耦合这些工具来模拟FOWT的目的是为了获得高保真度的设计结果,从而与使用CFD模拟转子空气动力学(通常考虑刚性叶片)和平台流体动力学相比,减少了计算时间。OF2方法还允许我们将风力涡轮机上存在的气动-伺服-弹性联轴器与CFD解决的流体动力系统包括在内。浮式海上风力涡轮机的高复杂性情况,如风暴、偏航漂移、风向标或系泊线断裂,意味着浮式平台的高位移和旋转或相关的非线性效应,可以使用OF2解决,克服了许多最先进的潜在水动力代码的限制,假设平台的小位移。此外,还可以同时获得平台构件压力分布和塔基荷载、导通导联张力等计算和设计过程所需的全部信息。此外,可以考虑紊流风和/或弹性叶片的影响,以解决设计和认证标准中的负载情况。
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OF2: coupling OpenFAST and OpenFOAM for high-fidelity aero-hydro-servo-elastic FOWT simulations
Abstract. The numerical study of floating offshore wind turbines (FOWTs) requires accurate integrated simulations which consider the aerodynamic, hydrodynamic, servo and elastic responses of these systems. In addition, the floating system dynamics couplings need to be included to calculate the excitation over the ensemble accurately. In this paper, a new tool has been developed for coupling NREL's aero-servo-elastic tool OpenFAST with the computational fluid dynamics (CFD) toolbox OpenFOAM. OpenFAST is used to model the rotor aerodynamics along with the flexible response of the different components of the wind turbine and the controller at each time step considering the dynamic response of the platform. OpenFOAM is used to simulate the hydrodynamics and the platform's response considering the loads from the wind turbine. The whole simulation environment is called OF2 (OpenFAST and OpenFOAM). The OC4 DeepCWind semi-submersible FOWT together with NREL's 5 MW wind turbine has been simulated using OF2 under two load cases. The purpose of coupling these tools to simulate FOWT is to obtain high-fidelity results for design purposes, thereby reducing the computational time compared with the use of CFD simulations both for the rotor aerodynamics, which usually consider rigid blades, and for the platform's hydrodynamics. The OF2 approach also allows us to include the aero-servo-elastic couplings that exist on the wind turbine along with the hydrodynamic system resolved by CFD. High-complexity situations of floating offshore wind turbines, like storms, yaw drifts, weather vanes or mooring line breaks, which imply high displacements and rotations of the floating platform or relevant non-linear effects, can be resolved using OF2, overcoming the limitation of many state-of-the-art potential hydrodynamic codes that assume small displacements of the platform. In addition, all the necessary information for the FOWT calculation and design processes can be obtained simultaneously, such as the pressure distribution at the platform components and the loads at the tower base, fairleads tension, etc. Moreover, the effect of turbulent winds and/or elastic blades could be taken into account to resolve load cases from the design and certification standards.
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来源期刊
Wind Energy Science
Wind Energy Science GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY-
CiteScore
6.90
自引率
27.50%
发文量
115
审稿时长
28 weeks
期刊最新文献
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