Volume 10: Ocean Renewable Energy最新文献_第6页

Development of Offshore Structural Analysis Software X-SEA Coupled With FAST 结合FAST的海上结构分析软件X-SEA的开发

Volume 10: Ocean Renewable Energy Pub Date : 2019-11-11 DOI: 10.1115/omae2019-96778

Ki-Du Kim, S. Vachirapanyakun, Pasin Plodpradit, V. Dinh, Jin-Ho Park

引用次数: 2

Numerical Study on Aero-Hydrodynamics With Inter-Turbine Spacing Variation for Two Floating Offshore Wind Turbines 两浮式海上风力机机距变化时的气水动力学数值研究

Volume 10: Ocean Renewable Energy Pub Date : 2019-11-11 DOI: 10.1115/omae2019-95520

Y. Huang, D. Wan

{"title":"Numerical Study on Aero-Hydrodynamics With Inter-Turbine Spacing Variation for Two Floating Offshore Wind Turbines","authors":"Y. Huang, D. Wan","doi":"10.1115/omae2019-95520","DOIUrl":"https://doi.org/10.1115/omae2019-95520","url":null,"abstract":"\u0000 To investigate the influence of the inter-turbine spacing on the performance of the floating offshore wind turbine (FOWT) in the floating wind farm, coupled aero-hydrodynamic simulations of two spar-type FOWT models with inter-turbine spacing variation under shear wind and regular wave conditions are performed in the present work. An unsteady actuator line model (UALM) is embedded into in-house code naoe-FOAM-SJTU to establish a fully coupled CFD analysis tool for numerical simulations of FOWTs. From the simulation results, the unsteady aerodynamic power and thrust are obtained, and the hydrodynamic responses including the six-degree-of-freedom motions and mooring tensions are available. Detailed flow visualizations of wake velocity profiles and vortex structures are also illustrated. The coupled performance of floating offshore wind turbines with inter-turbine spacing variation are analyzed, and the influences of inter-turbine spacing on aero-hydrodynamic characteristics of coupled wind-wave flow field are discussed. It is found that the power output of downstream wind turbine increases with inter-turbine spacing. Coupled aero-hydrodynamic characteristics of flow filed are significantly affected by inter-turbine spacing.","PeriodicalId":306681,"journal":{"name":"Volume 10: Ocean Renewable Energy","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122788473","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Analysis on Hydrodynamic Responses of a Spar Offshore Wind Turbine With an Innovative Type of Mooring System 新型系泊系统的桅杆式海上风力机水动力响应分析

Volume 10: Ocean Renewable Energy Pub Date : 2019-11-11 DOI: 10.1115/omae2019-96759

Yuan Ma, Chaohe Chen, Xinkuan Yan, Yijun Shen, Tianhui Fan

{"title":"Analysis on Hydrodynamic Responses of a Spar Offshore Wind Turbine With an Innovative Type of Mooring System","authors":"Yuan Ma, Chaohe Chen, Xinkuan Yan, Yijun Shen, Tianhui Fan","doi":"10.1115/omae2019-96759","DOIUrl":"https://doi.org/10.1115/omae2019-96759","url":null,"abstract":"\u0000 The mooring system is a key component connecting a floating offshore wind turbine (FOWT) to the seabed. Generally, the traditional mooring systems mainly control the horizontal motions of the floating platform. However, due to the existence of blades, tower structure and the requirement of power generation efficiency, there is a high requirement on the pitching performance when a platform is used for the floating wind turbine. Therefore, an innovative type of mooring system which could improve the pitch performance of the FOWT is really needed.\u0000 In this paper, considering the OC3-Hywind Spar floating wind turbine, based on the original type of 3 × 3 mooring system, an innovative type of mooring system which has a better control performance of the pitch of FOWT is designed. Then, the hydrodynamic responses of the floating wind turbine platform are investigated. The influence of two different mooring system types on the hydrodynamic responses of the FOWT are compared and analyzed. The conclusions of this study could serve as a reference for the mooring system design of floating wind turbine systems.","PeriodicalId":306681,"journal":{"name":"Volume 10: Ocean Renewable Energy","volume":"112 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127695217","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Evaluation of Entropy Generation Methods in Wells Turbine 井式水轮机熵产方法的评价

Volume 10: Ocean Renewable Energy Pub Date : 2019-11-11 DOI: 10.1115/omae2019-96513

F. Licheri, T. Ghisu, Irene Virdis, P. Puddu, F. Cambuli

引用次数: 0

Investigation of Focused Wave Impact on Floating Platform for Offshore Floating Wind Turbine: A CFD Study 海上浮式风力机浮式平台聚焦波冲击的CFD研究

Volume 10: Ocean Renewable Energy Pub Date : 2019-06-13 DOI: 10.1115/OMAE2019-96043

Yang Zhou, Q. Xiao, Yuanchuan Liu, A. Incecik, C. Peyrard

{"title":"Investigation of Focused Wave Impact on Floating Platform for Offshore Floating Wind Turbine: A CFD Study","authors":"Yang Zhou, Q. Xiao, Yuanchuan Liu, A. Incecik, C. Peyrard","doi":"10.1115/OMAE2019-96043","DOIUrl":"https://doi.org/10.1115/OMAE2019-96043","url":null,"abstract":"\u0000 Most existing research related to a semi-submersible offshore floating platform focuses on the wave-structure interaction under either a regular or irregular wave condition. In order to numerically model the irregular wave impact on a semi-submersible platform hydrodynamic response with a low computational cost, in this study, a focused wave is utilized. The platform under this consideration is the DeepCwind semi-submersible platform. A high fidelity CFD numerical solver based on solving Navier-Stokes equations is adopted to estimate the dynamic response and the hydrodynamic loading of the platform. The focused wave is firstly generated based on a first order irregular wave theory in a numerical wave tank and validated against the linear wave theory results. Next, for CFD coding validation, the surface elevation of a fixed FPSO model associated with a focused wave is calculated and compared with the benchmark results. At last, the dynamic responses of the platform are numerically simulated under various focused wave parameters, and the results are compared with those obtained from an in-house potential flow theory tool at Électricité de France (EDF). It is found that the predicted CFD surge motion responses are close to those achieved with the second order potential theory while differ from the results obtained using linear potential theory. As to the pitch motion, differences are observed between two results, due to the different methods used for second order loads and viscous effects calculation. Turning to the results under different wave parameters, the surge and heave motion responses increase as the wave period goes up. However, the pitch motion is not affected significantly by varying wave periods. It may be due to the fact that the low-frequency effects have limited impact on the pitch motion. The strong nonlinearity at extremely large wave amplitude will be the task in our near future study.","PeriodicalId":306681,"journal":{"name":"Volume 10: Ocean Renewable Energy","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115278935","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

The Wave Energy Converter Control Competition: Overview 波浪能量转换器控制竞赛:概述

Volume 10: Ocean Renewable Energy Pub Date : 2019-06-09 DOI: 10.1115/omae2019-95216

J. Ringwood, F. Ferri, Nathan Tom, K. Ruehl, N. Faedo, G. Bacelli, Yi-Hsiang Yu, R. Coe

{"title":"The Wave Energy Converter Control Competition: Overview","authors":"J. Ringwood, F. Ferri, Nathan Tom, K. Ruehl, N. Faedo, G. Bacelli, Yi-Hsiang Yu, R. Coe","doi":"10.1115/omae2019-95216","DOIUrl":"https://doi.org/10.1115/omae2019-95216","url":null,"abstract":"\u0000 Over the past two years, a wave energy converter control systems competition (WECCCOMP) has been in progress, with the objective of comparing different wave energy converter (WEC) control paradigms on a standard benchmark problem. The target system is a point absorber, corresponding to a single float with an absolute reference, of the WaveStar WEC prototype. The system was modelled in WEC-Sim, with the hydrodynamic parameters validated against tank test data. Competitors were asked to design and implement a WEC control system for this model, with performance evaluated across six sea states. The evaluation criteria included a weighted combination of average converted power, peak/average power, and the degree to which the system physical constraints were exploited or temporarily exceeded.\u0000 This paper provides an overview of the competition, which includes a comparative evaluation of the entries and their performance on the simulation model. It is intended that this paper will act as an anchor presentation in a special session on WECCCOMP at OMAE 2019, with other papers in the special session contributed by the competitors, describing in detail the control algorithms and the results achieved over the various sea states.","PeriodicalId":306681,"journal":{"name":"Volume 10: Ocean Renewable Energy","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127276479","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 17

Feasibility Study of Mooring Lines Design for a Floating Tidal Turbine Platform Using Double Hull Structure 双壳结构浮式潮汐轮机平台系泊线设计可行性研究

Volume 10: Ocean Renewable Energy Pub Date : 2019-06-09 DOI: 10.1115/omae2019-95998

N. Arini, P. Thies, L. Johanning, E. Ransley, S. Brown, N. Xie, D. Greaves

{"title":"Feasibility Study of Mooring Lines Design for a Floating Tidal Turbine Platform Using Double Hull Structure","authors":"N. Arini, P. Thies, L. Johanning, E. Ransley, S. Brown, N. Xie, D. Greaves","doi":"10.1115/omae2019-95998","DOIUrl":"https://doi.org/10.1115/omae2019-95998","url":null,"abstract":"\u0000 The aim of this paper is to study the mooring tension characteristics on a tidal energy converter (TIC) platform considering i) a horizontal and ii) a vertical tidal turbine. The study examines numerically the feasibility of a catenary mooring line for a modular tidal energy platform. A modular platform is designed and modelled with two floating hulls and anchored by studlink catenary mooring chains on the seabed. Vertical and horizontal axis turbines which have similar Cp are selected and modelled separately. The effect of those turbines on the mooring system are compared and the results informs lifetime of the mooring component for each turbine connection. The hydrodynamic model with no turbine is firstly developed and validated against an experiment with 1:12 scale ratio. The starboard fore mooring line tension, platform surge and pitch displacements are validated against the experiment. The model results show identical signal frequency with slightly different magnitude from the experiment. The mooring tension under vertical and horizontal tidal turbine operations in the particular environment is further examined. The result shows that the mooring line using selected vertical axis turbine experiences higher tension. For platform motions, the horizontal turbine generates slightly larger displacement in surge. However the pitch motion record shows equal displacement under both turbine operations. The selected vertical axis tidal turbine also produces longer lifetime mooring components.","PeriodicalId":306681,"journal":{"name":"Volume 10: Ocean Renewable Energy","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125816733","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Hybrid Model Testing of Floating Wind Turbines: Test Bench for System Identification and Performance Assessment 浮动式风力发电机混合模型试验:系统识别与性能评估试验台

Volume 10: Ocean Renewable Energy Pub Date : 2019-06-09 DOI: 10.1115/omae2019-96374

V. Arnal, F. Bonnefoy, J. Gilloteaux, S. Aubrun

{"title":"Hybrid Model Testing of Floating Wind Turbines: Test Bench for System Identification and Performance Assessment","authors":"V. Arnal, F. Bonnefoy, J. Gilloteaux, S. Aubrun","doi":"10.1115/omae2019-96374","DOIUrl":"https://doi.org/10.1115/omae2019-96374","url":null,"abstract":"\u0000 The present study shows preliminary results of the SOFTWIND project that aims at developing an innovative experimental test bench dedicated to floating wind turbine wave tank testing. The following methodology is based on a “software in the loop” approach that combines numerical modeling with physical modeling. The originality of the experimental approach lies in the use of an innovative set of actuators located at the top of the wind turbine tower which is in charge of emulating the response of the rotor. First, results of a sensitivity analysis on the specifications of the aerodynamic forces to be emulated are presented. Low pass filtering effect in the actuation — linked to the physical characteristics of the actuators and numerical-physical loop — are first considered through fully coupled numerical simulations for different load cases including turbulent winds, misaligned wind-wave conditions and different floaters. Then, a test bench with imposed motions has been designed for the verification of communication protocols, real-time execution for the numerical model, motion and force observers and preliminary actuator model identification. Response to rising steps combined with white noise identification of the actuator with this test bench give promising results in open loop.","PeriodicalId":306681,"journal":{"name":"Volume 10: Ocean Renewable Energy","volume":"389 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131713223","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Modeling a Non-Linear Mooring System for Floating Offshore Wind Using a Hydraulic Cylinder Analogy 基于液压缸类比的海上浮式风电非线性系泊系统建模

Volume 10: Ocean Renewable Energy Pub Date : 2019-06-09 DOI: 10.1115/OMAE2019-96080

Magnus Harrold, P. Thies, David Newsam, C. B. Ferreira, L. Johanning

{"title":"Modeling a Non-Linear Mooring System for Floating Offshore Wind Using a Hydraulic Cylinder Analogy","authors":"Magnus Harrold, P. Thies, David Newsam, C. B. Ferreira, L. Johanning","doi":"10.1115/OMAE2019-96080","DOIUrl":"https://doi.org/10.1115/OMAE2019-96080","url":null,"abstract":"\u0000 The mooring system for a floating offshore wind turbine is a critical sub-system that ensures the safe station keeping of the platform and has a key influence on hydrodynamic stability. R&D efforts have increasingly explored the benefits of nonlinear mooring systems for this application, as they have the potential to reduce the peak mooring loads and fatigue cycling, ultimately reducing the system cost. This paper reports on a hydraulic based mooring component that possesses these characteristics, attributable mostly to the non-linear deformation of a flexible bladder. This is not a typical hydraulic component and, as a consequence, modeling its dynamic performance is non-trivial. This paper addresses this by introducing an analogy to numerically model the system, in which the functionality of the mooring component is compared to that of a hydraulic cylinder. The development of a working model in Simscape Fluids is outlined, and is subsequently used to simulate the IMS in a realistic environment. It is found that the numerical model captures a number of the dynamic performance characteristics observed in a previously tested prototype of the IMS.","PeriodicalId":306681,"journal":{"name":"Volume 10: Ocean Renewable Energy","volume":"79 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125075220","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Characterizing Impacts of Atmospheric Turbulence on Wind Farms Through Large Eddy Simulation (LES) 通过大涡模拟(LES)表征大气湍流对风电场的影响

Volume 10: Ocean Renewable Energy Pub Date : 2019-06-09 DOI: 10.1115/omae2019-95837

J. Alam, A. Afanassiev, Jagdeep Singh

引用次数: 2