Abstract This paper describes a methodology to determine the optimal size of a Wells turbine to be used in an OWC device taking into account hydro-aerodynamic coupling, performance curves of the turbine and air pressure control by a relief valve. The proposed model, named turbine diameter optimization (TDO) model, considers the movement of the water surface inside the OWC chamber as a piston movement in response to the hydrodynamic forces from the incoming waves. The aerodynamic is based on the first law of thermodynamics applied to the air column of the chamber. The power-pressure curve of the turbine and the air pressure control by relief valve are implemented in the model to determine the turbine power output for several regular incident waves. The TDO model is initially calibrated by a numerical model based on Reynolds-Average-Navier-Stokes (RANS) equations for each wave component of an expected sea state distribution. Thereafter, the power output generated by turbines of several sizes is calculated with lower computational cost (few minutes) in comparison with RANS based models (thousands of hours) in a personal computer. This developed methodology is an important support to the process of turbine sizing for an OWC device for an expected sea state distribution.

中文翻译：

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一种利用耦合水-空气动力学模型确定振荡水柱装置中井轮机最佳尺寸的方法

摘要 本文描述了一种方法，用于确定 OWC 设备中使用的 Wells 涡轮机的最佳尺寸，同时考虑到水-空气动力耦合、涡轮机的性能曲线和安全阀的空气压力控制。所提出的模型，称为涡轮直径优化 (TDO) 模型，将 OWC 室内水面的运动视为活塞运动，以响应来自传入波浪的水动力。空气动力学基于应用于腔室气柱的热力学第一定律。在模型中实现了涡轮的功率-压力曲线和安全阀的空气压力控制，以确定几个规则入射波的涡轮功率输出。TDO 模型最初由基于雷诺-平均-纳维-斯托克斯 (RANS) 方程的数值模型校准，用于预期海况分布的每个波浪分量。此后，与个人计算机中基于 RANS 的模型（数千小时）相比，以较低的计算成本（几分钟）计算出由多种尺寸的涡轮机产生的功率输出。这种开发的方法是对 OWC 设备涡轮机尺寸确定过程的重要支持，以实现预期的海况分布。