新型阶梯式浅吃水单立柱浮式风机平台水动力分析

常规的单立柱式(Spar)风力发电机平台,在水深较浅区域工作时,结构本身受吃水限制,工作效果较差。常规Spar重心较低,具有良好的稳定性,但是由于它往往具有超过100 m的吃水,因此使其不能应用于中近海域(水深小于100 m)。可设计研究一种适用于中国东海不超过100 m水深的中近海域新型浮式风机平台以解决此问题。针对NREL 5MW风机能应用于100 m水深的情况,对50 m吃水的新型Spar(SJTU-S4)及其系泊系统进行了概念设计研究。利用商业软件建立水动力模型,进行数值仿真,同时设计缩比模型试验,在上海交通大学海洋工程国家重点实验室(SKLOE)进行水动力性能测试。结果表明,本文研究的新阶梯式浅吃水单立柱浮式风机平台在100 m水深、多种海洋波浪环境下,通过试验和仿真验证,能够具有良好的运动响应,为风机提供较好的工作条件。

Hydrodynamic Performance of a Novel Stepped Short Spar for Shallow Floating Wind Turbine

Due to the limitation of structure size,conventional Spar type floating wind turbine(FWT)may be less feasible in the areas while the water depth is more shadow.Conventional Spar for FWT has the advantages of good performance in stability by very low center of gravity,however it cannot be used for shallow water cases(water depth less than 100 m)due to the draft more than 100 m.A novel short-draft Spar is developed for FWT in China East Sea where the water depth is normally less than 100 m.A conceptual study with 50 m draft of Spar(SJTU-S4)is performed for the NREL 5 MW wind turbine with target water depth of 100 m and the mooring system is also developed.The hydrodynamic model was established by using commercial software and numerical simulation was carried out.Then,a scaled model test was designed.The hydrodynamic performance test was carried out at the State Key Laboratory of Ocean Engineering(SKLOE)of Shanghai Jiao Tong University.The results show that the SJTU-S4 wind turbine can achieve good motions response and provide better working conditions for the wind turbine under 100 m water depth and various ocean wave environments.