The hydrodynamics of deformable flexible fabric structures for wave energy conversion

用于波能转换的可变形柔性织物结构的流体动力学

• 批准号: EP/K012177/1
• 负责人: Deborah Greaves
• 金额: $ 55.24万
• 依托单位: Plymouth University
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2013
• 资助国家: 英国
• 起止时间: 2013 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=EP%2FK012177%2F1
• 关键词: hydrodynamics; deformable; flexible; fabric; structures

Whereas tidal stream technology is relatively advanced, the wave energy industry is still in a nascent stage of development with a wide range of different design concepts for extracting wave energy being developed. A winning technology has yet to be identified and there may well be more than one. It is within this framework that the theme of 'Novel, future, concepts for marine energy generation' is listed within the EPSRC SUPERGEN Marine challenge 2 Marine energy (Wave and Tidal) technology for 2050. Addressing this theme, we propose a new concept for wave energy conversion that uses a novel hydrodynamic action and is constructed from low cost material leading to significant reduction in cost and size of device in comparison with others. A significant drawback of wave energy converters acting as heaving point absorbers is the mismatch between the typical wave period of the wave climate and the resonant natural period of motion response. This means that devices have to be large in order to operate optimally in swell waves. To overcome these limitations, control systems may be used in order to modify the motion response to suit the wave climate, but this can be complex and expensive. In this project, we investigate an alternative approach in which the device's geometry responds to hydrodynamic loading. In its simplest form, the concept is a floating wedge-shaped body that has a spring-loaded hinge at its apex that closes as the device sinks and opens as it rises in a breathing action. In the proposed project an axisymmetric form will be investigated; comprising a sealed bag that shrinks and swells without hinges. This breathing action makes it possible to install a power take-off inside the device that requires no external reference. This distinguishes it from other heaving point absorbers. The breathing action can be used to pump air through a reversible flow (Wells) turbine into a second container of fixed volume. No other mechanical parts are needed because the pressure change in the fixed volume generates a spring force which contributes to the restoring force on the device. The concept can be designed so that the breathing system resonates at the heaving frequency.The proposed project will assess the hydrodynamics of the breathing action within a new device concept called the Squid, by developing an optimisation tool using semi-analytical and numerical models and by performing a series of physical experiments. Both still water tests in the flume at the University of Southampton and wave tests in the ocean basin within the new COaST Laboratory at Plymouth University will be carried out and used to investigate the characteristics of the new concept and to validate the numerical model optimisation tool.

尽管潮汐流技术相对先进，但波浪能工业仍处于发展的初期阶段，开发了各种不同的用于提取波浪能的设计概念。一项成功的技术尚未确定，而且很可能不止一项。正是在这个框架内，“海洋能源发电的新颖，未来，概念”的主题被列入EPSRC SUPERGEN海洋挑战2 2050年海洋能源（波浪和潮汐）技术。针对这一主题，我们提出了一个新的概念，波能转换，使用一种新的流体动力学作用，是由低成本的材料，导致显着降低成本和设备的尺寸相比，其他构造。波能转换器作为垂荡点吸收器的一个显著缺点是波浪气候的典型波浪周期与运动响应的共振自然周期之间的不匹配。这意味着设备必须很大，以便在涌浪中以最佳方式运行。为了克服这些限制，可以使用控制系统来修改运动响应以适应波浪气候，但是这可能是复杂且昂贵的。在这个项目中，我们研究了一种替代方法，其中设备的几何形状响应于流体动力学负载。在其最简单的形式中，该概念是一个浮动的楔形体，其顶点处具有弹簧加载的铰链，该铰链在设备下沉时关闭，并在呼吸动作中上升时打开。在拟议的项目中，将研究轴对称形式，包括一个密封袋，收缩和膨胀没有铰链。这种呼吸动作使得可以在设备内部安装不需要外部参考的动力输出装置。这使它区别于其他的升沉点吸收器。呼吸动作可用于将空气通过可逆流（威尔斯）涡轮机泵送到固定容积的第二容器中。不需要其他机械部件，因为固定体积中的压力变化会产生弹簧力，该弹簧力有助于装置上的恢复力。该概念可以设计为使呼吸系统在起伏频率下共振。拟议的项目将通过使用半解析和数值模型开发优化工具并通过执行一系列物理实验，评估称为Squid的新设备概念中呼吸动作的流体动力学。南安普顿大学水槽中的静水试验和普利茅斯大学新COaST实验室内海洋盆地中的波浪试验将进行，并用于研究新概念的特征和验证数值模型优化工具。

项目成果

Numerical and experimental investigation of wave energy devices with inflated bags

充气袋波浪能装置的数值与实验研究

• 发表时间: 2015
• 作者: Chaplin, J

The hydrodynamics of air-filled bags for wave energy conversion

用于波浪能转换的充气袋的流体动力学

• 发表时间: 2016
• 作者: Greaves, D

Wave power absorption by a submerged balloon fixed to the sea bed

固定在海床上的水下气球吸收波浪能

• DOI: 10.1049/iet-rpg.2016.0044
• 发表时间: 2016
• 期刊: IET Renewable Power Generation
• 影响因子: 2.6
• 作者: Kurniawan A

Wave energy devices with compressible volumes.

• DOI: 10.1098/rspa.2014.0559
• 发表时间: 2014-12-08
• 期刊: Proceedings. Mathematical, physical, and engineering sciences
• 作者: Kurniawan A;Greaves D;Chaplin J
• 通讯作者: Chaplin J

Wave energy absorption by a submerged air bag connected to a rigid float.

通过连接到刚性浮子的浸入式气囊吸收波浪能。

• DOI: 10.1098/rspa.2016.0861
• 发表时间: 2017
• 期刊: Proceedings. Mathematical, physical, and engineering sciences
• 作者: Kurniawan A