中国海洋大学学报（自然科学版）2025，Vol.55Issue(7)：87-95,9.DOI:10.16441/j.cnki.hdxb.20230086
低流速小型潮流能水轮机导流罩性能分析
Performance Analysis of Diffuser for Small Tidal Current Turbines Under Low Flow Velocity
摘要
Abstract
Aiming at the problem of self-power supply of marine instruments,this paper proposes a small tidal current turbine with a compact diffuser.The turbine aims to improve the utilization efficien-cy of tidal current energy at low flow rate,and has the characteristics of convenient manufacturing,sim-ple construction and good portability.In order to further study the hydrodynamic performance of the fairing,based on the Computational Fluid Dynamics(CFD)method,the accuracy of the model and the reliability of the numerical simulation method are verified by comparing with the published literature da-ta.In the process of research,through the analysis of different types of deflectors,the simulation analy-sis of the flow convergence effect of the deflector is carried out,and the cycloidal trailing edge deflector is selected as the optimization scheme.The results show that the installation of the diffuser can increase the flow velocity of the internal flow field by about 1.9 times,and the maximum capacity coefficient of the turbine is increased by about 33％.When the gap between the tip of the turbine and the throat of the diffuser is 0.05D,the capacity coefficient reaches the highest.The shape parameters of the trailing edge of the diffuser are studied.It is found that the appropriate trailing edge height and trailing edge inclina-tion angle can further enhance the energy harvesting effect of the diffuser on the turbine.Therefore,this study provides ideas and references for the design and research of the guide cover of small tidal cur-rent turbine.关键词
潮流能水轮机/紧凑型导流罩/计算流体动力学/低流速/水动力性能Key words
tidal current turbine/compact diffuser/computational fluid dynamics/low flow velocity/hydrodynamic performance分类
能源科技引用本文复制引用
谭俊哲,郎咸鹏,袁鹏,司先才,杜修茂..低流速小型潮流能水轮机导流罩性能分析[J].中国海洋大学学报（自然科学版）,2025,55(7):87-95,9.基金项目
国家重点研究发展计划项目(2018YFB1501903) （2018YFB1501903）
山东省重点研究发展计划项目(2019GGX103012)资助Supported by the National Research and Development Program of China(2018YFB1501903) （2019GGX103012）
the Key Research and Development Pro-gram of Shandong Province(2019GGX103012) （2019GGX103012）
