Optimization of blade profiles for the Wells turbine
Optimization of blade profiles for the Wells turbine
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DOI：
10.1016/j.oceaneng.2018.08.066
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发表时间：
2018-12-01
影响因子：
5
通讯作者：
Puddu, Pierpaolo
中科院分区：
文献类型：
--
作者：
Gratton, Tim;Ghisu, Tiziano;Puddu, Pierpaolo
当与振荡的水柱结合时，威尔斯涡轮机可以利用海洋表面波浪的能量发电。在目前的工作中，禁忌搜索是用来控制优化的过程中的叶片轮廓的威尔斯涡轮机更大的性能，通过最大化的扭矩系数。自由变形方法被用作操纵叶片轮廓的有效手段，OpenFOAM中的计算流体动力学被用于评估二维和三维的每个轮廓。在对轮毂和叶尖处的二维叶片进行优化之前，对进行优化时的流量系数和自由变形工具中的控制变量数量进行了调查。这导致头端和轮毂处的扭矩系数分别增加34%和32%。然后将这些结果应用于三维涡轮机，使扭矩系数增加14%。结果进行了评估，并提出了一种改进的方法，优化叶片在两个维度。
A Wells turbine, when coupled with an oscillating water column, allows the generation of power from the energy in waves on the surface of the ocean. In the present work, a tabu search is used to control the process of optimising the blade profile in the Wells turbine for greater performance, by maximising the torque coefficient. A free form deformation method is used as an efficient means of manipulating the blade profile and computational fluid dynamics in OpenFOAM are used to assess each profile in both two and three dimensions. Investigations into both the flow coefficient at which the optimization is performed and the number of control variables in the free form deformation tool are performed before optimisations are done on a two-dimensional blade at the hub and tip solidities. This results in increases to the torque coefficient of 34% and 32% at the tip and hub solidities, respectively. These results are then applied to the three-dimensional turbine, giving a 14% increase in the torque coefficient. The results are assessed and an improved method of optimising the blade in two dimensions is proposed.