The oscillating water column is the most widely used wave energy converting technology for onshore applications. In the previous studies, the performances of the chamber and the turbine were investigated separately, or some substitutions were employed to induce the damping effects. In this study, an OWC model employing the cubic chamber and the impulse turbine is studied experimentally in a wave flume. The model turbine operates under the free-spinning mode with the resistance connecting to the electrical generator as the external loads. Regular wave conditions are applied to generate different wave scenarios to investigate the hydrodynamic and aerodynamic performance of the chamber-turbine system of the OWC model. The primary-stage, secondary-stage, and overall efficiencies under the free-spinning mode for various wave conditions and load coefficients are presented. The peak efficiencies are compared with those under the fixed rotation-speed mode. Experimental results indicate that the chamber length should be designed according to the local predominant wave climate, and the proper external resistances should be chosen to enhance its overall efficiency.

振荡水柱是用于陆上应用的最广泛使用的波能转换技术。在以前的研究中，分别对燃烧室和涡轮的性能进行了研究，或者采用了一些替代方法来引起阻尼效果。在这项研究中，在波浪槽中对采用立方腔和脉冲涡轮的OWC模型进行了实验研究。模型涡轮机在自由旋转模式下运行，其电阻作为外部负载连接到发电机。应用规则波浪条件来生成不同的波浪情景，以研究OWC模型的室－涡轮系统的水动力和空气动力性能。初级阶段，次级阶段，给出了自由旋转模式下各种波浪条件和载荷系数下的整体效率。将峰值效率与固定转速模式下的峰值效率进行比较。实验结果表明，应根据当地的主要波浪气候设计试验箱的长度，并应选择适当的外部电阻以提高其整体效率。