仰角对海上浮式风机系统流体动力性能影响研究  

The Coupled Dynamic Performance of Semi-submersible Floating Wind Turbine Systems

作　　者：韩长志 陈淑玲[1] 杨帅[1] 许思乾 HAN Changzhi;CHEN Shuling;YANG Shuai;XU Siqian(Jiangsu University of Science and Technology,Zhenjiang 212003,China)

机构地区：[1]江苏科技大学,江苏镇江212003

出　　处：《海洋技术学报》2022年第5期91-101,共11页Journal of Ocean Technology

摘　　要：海上风力发电场在世界范围内日益普及,由于对较高风能的需求和近海海域场地限制,风电开发逐渐向深海海域迈进,半潜浮式风机相较于固定式风机能够更好应对深海海域复杂的海况。本文基于CFD软件STAR-CCM+,采用计算流体力学方法和动态重叠网格技术,对粘性流体中的半潜浮式风机系统进行数值模拟。为了验证该软件数值模拟的准确性,本文首先对风机的气动力性能和浮式平台的水动力性能进行了计算,并与试验结果进行对比;然后建立了三维粘性数值波浪水池模型,选用10 MW半潜浮式风机系统,结合Catenary Coupling准静态系泊模块搭建风机—平台—锚泊耦合的多体运动模型;最后采用Navier-Stokes(NS)求解器,选取模型计算不同风机叶轮俯仰角度下海上浮式风机系统的运动响应及锚链载荷等。计算结果表明:风机叶轮俯仰角度的改变对风机功率的影响明显,对推力的影响较小;风机叶轮俯仰角度变化,锚链张力波动减小,但周期变化不明显。Offshore wind turbines are becoming increasingly popular worldwide.Due to the demand for higher wind energy and site constraints in offshore waters,wind turbines are gradually moving into deeper water,where semi-submersible floating turbines are better to fit for the complex sea conditions than fixed ones.Based on the CFD software STAR-CCM+,this paper uses computational fluid dynamic methods and dynamic overlapping mesh techniques to simulate a semi-submersible floating wind turbine system in the viscous fluid.In order to verify the accuracy of the software,the aerodynamic performance of wind turbine and the hydrodynamic performance of the floating platform are simulated,and the results are compared with the experimental data.Then,a three-dimensional viscous numerical wave pool is built,a 10MW semi-submersible floating wind turbine system is selected and a multi-body motion model of the wind turbine-platform-mooring coupling is constructed by combining the catenary coupling quasi-static mooring module,the k-ω model is selected to calculate the motion response and mooring chain load,etc.The results indicate that the effect of different angles of pitch on power is obvious,and there is no significant effect on thrust.With the increase of the angles of pitch,the tension of mooring chain decrease,but the period does not vary significantly.

关 键 词：数值模拟 浮式风机 水动力性能 气动力性能 CFD 

分 类 号：P751[交通运输工程—港口、海岸及近海工程]