Passively adaptive tidal turbine blades: Design tool development and initial verification
Passively adaptive tidal turbine blades: Design tool development and initial verification
复制标题
DOI：
10.1016/j.ijome.2016.02.001
复制
发表时间：
2016-06-01
期刊：
影响因子：
--
通讯作者：
Johnstone, Cameron M.
中科院分区：
文献类型：
--
作者：
Murray, Robynne E.;Nevalainen, Thomas;Johnstone, Cameron M.
由非均质复合材料制成的固定节距被动自适应潮汐涡轮叶片具有降低叶片和结构载荷、降低设计工况以上功率、减少空化产生和减少疲劳载荷影响的潜力。由于这些叶片的灵活性，需要一种流固耦合设计方法。本文概述了一种耦合有限元(FEM)-叶片单元动量理论（BEMT）设计工具的开发，该工具用于迭代被动自适应叶片的结构（变形和应力）和水动力（动力和推力载荷）响应。与计算流体动力学-有限元耦合代码相比，这种FEM-BEMT设计方法提供了一种计算需求最小的早期工具。设计代码的BEMT和FEM组件都进行了独立验证，并在这里给出了结果。在一个小型涡轮机的案例研究中，使用设计工具对三个预扭固定螺距被动自适应叶片进行了研究，结果显示，在高于设计条件的流速下，负荷缓解和功率下降，并且在切入速度和设计速度之间增加了总体功率捕获。(C) 2016 Elsevier Ltd.版权所有。
Fixed pitch passively adaptive tidal turbine blades made of non-homogeneous composite materials have the potential to reduce blade and structural loads, shed power above design conditions, reduce cavitation inception, and reduce the effects of fatigue loading. Due to the flexibility of these blades, a fluid-structure interaction design methodology is required. This paper outlines the development of a coupled finite element (FEM)-blade element momentum theory (BEMT) design tool developed to iterate between the structural (deformation and stresses) and hydrodynamic (power and thrust loads) responses of passively adaptive blades. Such a FEM-BEMT design methodology provides an early stage tool with minimal computational requirements compared to computational fluid dynamics-FEM coupled codes. Both the BEMT and FEM components of the design code have been verified independently, with results presented here. Results using the design tool in a case study of a small-scale turbine with three pre-twisted fixed pitch passively adaptive blades, operated using variable speed control, showed load mitigation and power shedding at flow speeds above design conditions, and increased overall power capture between the cut-in speed and the design speed. (C) 2016 Elsevier Ltd. All rights reserved.