波浪能是海洋可再生能源中储量最为丰富的一种,而振荡水柱式(oscillating water column,OWC)波浪能发电装置是目前技术成熟度最高的波浪能装置类型之一。OWC数值模拟大部分基于计算流体力学(computational fluid dynamics,CFD)方法,主...波浪能是海洋可再生能源中储量最为丰富的一种,而振荡水柱式(oscillating water column,OWC)波浪能发电装置是目前技术成熟度最高的波浪能装置类型之一。OWC数值模拟大部分基于计算流体力学(computational fluid dynamics,CFD)方法,主要用于装置的结构参数优化设计及动力学响应分析。为提高OWC的数值计算效率,便于开展发电装置的控制设计与优化,提出一种面向控制的OWC波浪能装置等效数值模型,并完成不同工况下的水池试验验证。该数值模型基于线性势流理论和Cummins方法,将振荡水柱等效为和水同密度刚体,并将动力输出装置(power take-off,PTO)和黏性效应等效为线性阻尼系数。通过对比数值模拟和水池试验结果,可以发现该模型能较好地预测规则波、不规则波与不同PTO下的OWC自由液面及功率输出等动态特性。在此基础上,完成OWC装置闭锁控制设计,并对比分析OWC的俘能效率。研究发现,该等效数值模型可有效提高计算效率,能较准确地预测OWC自由液面动态过程及功率输出。展开更多
The demand for ocean exploration down to the deep seafloor,for instance,ocean resource exploration and ocean observations,has promoted innovations in underwater technology.Underwater unmanned vehicles are urgently req...The demand for ocean exploration down to the deep seafloor,for instance,ocean resource exploration and ocean observations,has promoted innovations in underwater technology.Underwater unmanned vehicles are urgently required to be deployed and operate on the seafloor.Because most underwater vehicles are unable to operate on the seafloor and even have difficulty reaching there,we developed a seafloor-resident autonomous underwater helicopter(AUH).This paper introduces the new idea and design of AUHs and discusses the pros and cons of AUHs in comparison with other underwater vehicles.Afterwards,we verify the importance of developing new facilities to enable mankind to easily operate close to the seafloor.展开更多
基金the financial support from the State Key Research and Development Project(2017YFC0306100)Hainan Key Research and Development Project(ZDYF2020197)Fundamental Research Funds for the Zhejiang Provincial Universities(2021XZZX014)。
文摘The demand for ocean exploration down to the deep seafloor,for instance,ocean resource exploration and ocean observations,has promoted innovations in underwater technology.Underwater unmanned vehicles are urgently required to be deployed and operate on the seafloor.Because most underwater vehicles are unable to operate on the seafloor and even have difficulty reaching there,we developed a seafloor-resident autonomous underwater helicopter(AUH).This paper introduces the new idea and design of AUHs and discusses the pros and cons of AUHs in comparison with other underwater vehicles.Afterwards,we verify the importance of developing new facilities to enable mankind to easily operate close to the seafloor.
