近海固定式海上风机基础,多采用大直径单桩钢管,对其进行合理改造可作为振荡水柱式(Oscillating Water Column,OWC)波浪能发电装置的捕能气室。本文提出了一种将固定式单桩基础与OWC装置耦合的结构方案,即在单桩基础的水下合理位置开孔...近海固定式海上风机基础,多采用大直径单桩钢管,对其进行合理改造可作为振荡水柱式(Oscillating Water Column,OWC)波浪能发电装置的捕能气室。本文提出了一种将固定式单桩基础与OWC装置耦合的结构方案,即在单桩基础的水下合理位置开孔,水面以上加装导流管道、空气透平及出气管道,从而形成内置式OWC装置。由于本文只研究OWC装置的一级能量转换过程,所以不考虑空气透平及发电机等后端设备,仅用气孔来代替后端设备所产生的压降作用。为揭示新型OWC装置的获能机理,通过数值模拟计算,研究了方形、椭圆形、圆形三种开孔形状,开孔吃水深度d/h为0.13、0.27、0.40和0.53四种情况,以及开孔大小s/S_(c)为0.054和0.042两种条件下影响OWC装置水动力性能的3个主要因素。结果表明,当气室开孔型式为方形,d/h=0.13,s/S_(c)=0.054时,气室的捕获宽度比ξ最佳,ξ最大可达0.23。展开更多
The integration of oscillating water columns(OWCs)with piles to create a dual-function OWC-pile breakwater presents an innovative approach for harbor construction and coastline protection while enabling wave energy ut...The integration of oscillating water columns(OWCs)with piles to create a dual-function OWC-pile breakwater presents an innovative approach for harbor construction and coastline protection while enabling wave energy utilization.Local scour significantly impacts foundation safety and is crucial for structural design.This study examines wave-induced local scour at a dual-function OWC-pile breakwater through experimental methods.A high-resolution laser scanner tracked the development of 3D local scour profiles at various time intervals under regular wave conditions.The analysis focused on key parameters including scour-hole development time scale,dimensions,reflection and transmission coefficients,and energy extraction efficiency during scour evolution.The integration of OWCs substantially increased the equilibrium scour depth compared to conventional pile breakwaters,potentially affecting foundation stability.The scour profile development showed minimal impact on wave energy conversion efficiency.Wave transmission and reflection remained largely unaffected by scour holes,as verified through a semi-theoretical wave scattering model for pile breakwaters.An existing time-scale formula for predicting scour depth onset in isolated circular piles under current action demonstrated reasonable accuracy in this application.The study examines the mechanisms behind increased equilibrium scour depth due to OWCs and proposes design recommendations to mitigate scour-hole depth increases.展开更多
针对当前大部分固定格式报表灵活性差、不能满足实际应用需求的不足,提出了基于OWC(Office Web Component)的柔性动态报表生成器解决方案。首先根据报表中数据的变化情况将其归纳为静态报表和动态报表并抽象出两类报表基模板;然后以柔...针对当前大部分固定格式报表灵活性差、不能满足实际应用需求的不足,提出了基于OWC(Office Web Component)的柔性动态报表生成器解决方案。首先根据报表中数据的变化情况将其归纳为静态报表和动态报表并抽象出两类报表基模板;然后以柔性软件的思想建立报表模板知识库,使得用户可以自行依据报表基模板建立所需的报表而无需对代码进行调整;最后采用OWC设计了柔性动态报表生成器。基于OWC丰富的数据表达能力和编辑功能,极大提高了报表软件的易用性和柔性。展开更多
Office Web Components是Microsoft Office 2000版本以上提供的一组控件集合,简称OWC组件,COM控件,其设计的目的是为众多的控件容器提供交互的电子表格建模,数据报表和数据可视化功能。OWC库包含四个主要的组件:Spreadshee(t电子数据表...Office Web Components是Microsoft Office 2000版本以上提供的一组控件集合,简称OWC组件,COM控件,其设计的目的是为众多的控件容器提供交互的电子表格建模,数据报表和数据可视化功能。OWC库包含四个主要的组件:Spreadshee(t电子数据表)组件、Char(t图表)组件、PivotTable(数据透视表)组件、Data Source(数据源)组件。文章对OWC组件的功能与应用进行了介绍,并提供了VB利用此组件开发的案例。展开更多
文摘近海固定式海上风机基础,多采用大直径单桩钢管,对其进行合理改造可作为振荡水柱式(Oscillating Water Column,OWC)波浪能发电装置的捕能气室。本文提出了一种将固定式单桩基础与OWC装置耦合的结构方案,即在单桩基础的水下合理位置开孔,水面以上加装导流管道、空气透平及出气管道,从而形成内置式OWC装置。由于本文只研究OWC装置的一级能量转换过程,所以不考虑空气透平及发电机等后端设备,仅用气孔来代替后端设备所产生的压降作用。为揭示新型OWC装置的获能机理,通过数值模拟计算,研究了方形、椭圆形、圆形三种开孔形状,开孔吃水深度d/h为0.13、0.27、0.40和0.53四种情况,以及开孔大小s/S_(c)为0.054和0.042两种条件下影响OWC装置水动力性能的3个主要因素。结果表明,当气室开孔型式为方形,d/h=0.13,s/S_(c)=0.054时,气室的捕获宽度比ξ最佳,ξ最大可达0.23。
基金supported by the National Natural Science Foundation of China(Grant No.52001031)the National Natural Science Foundation of Hunan Province under Excellent Youth Science Fund(Grant No.2025JJ40031)supported by the U.S.National Science Foundation(Grant No.CBET-1706938)during early stages of the present study。
文摘The integration of oscillating water columns(OWCs)with piles to create a dual-function OWC-pile breakwater presents an innovative approach for harbor construction and coastline protection while enabling wave energy utilization.Local scour significantly impacts foundation safety and is crucial for structural design.This study examines wave-induced local scour at a dual-function OWC-pile breakwater through experimental methods.A high-resolution laser scanner tracked the development of 3D local scour profiles at various time intervals under regular wave conditions.The analysis focused on key parameters including scour-hole development time scale,dimensions,reflection and transmission coefficients,and energy extraction efficiency during scour evolution.The integration of OWCs substantially increased the equilibrium scour depth compared to conventional pile breakwaters,potentially affecting foundation stability.The scour profile development showed minimal impact on wave energy conversion efficiency.Wave transmission and reflection remained largely unaffected by scour holes,as verified through a semi-theoretical wave scattering model for pile breakwaters.An existing time-scale formula for predicting scour depth onset in isolated circular piles under current action demonstrated reasonable accuracy in this application.The study examines the mechanisms behind increased equilibrium scour depth due to OWCs and proposes design recommendations to mitigate scour-hole depth increases.
文摘针对当前大部分固定格式报表灵活性差、不能满足实际应用需求的不足,提出了基于OWC(Office Web Component)的柔性动态报表生成器解决方案。首先根据报表中数据的变化情况将其归纳为静态报表和动态报表并抽象出两类报表基模板;然后以柔性软件的思想建立报表模板知识库,使得用户可以自行依据报表基模板建立所需的报表而无需对代码进行调整;最后采用OWC设计了柔性动态报表生成器。基于OWC丰富的数据表达能力和编辑功能,极大提高了报表软件的易用性和柔性。
