导流罩外部结构对微水头水轮机水动力性能的影响研究OA
Research on the Influence of the External Structure of the Fairing on the Hydrodynamic Performance of the Micro-head Hydraulic Turbine
针对增设导流罩外部结构对低流速水轮机水动力性能的影响问题,提出了一种抛物线型外部结构,旨在提升水轮机的发电效率.采用计算流体动力学(CFD)方法和Fluent仿真软件,对增设外部结构前后的水轮机水动力性能进行了对比分析研究.结果表明,增设外部结构显著改善了水轮机工作区域流场稳定性;基于此进一步研究了外部结构不同上下轴比例对流场特性及叶轮性能的影响,发现增设19∶21轴比的外部结构优化了水流的均匀性,使叶轮的功率系数达到峰值,提升了水轮机的稳定性和发电效率.
To study the influence of adding an external fairing structure on the hydrodynamic performance of low-velocity hydraulic turbines,this paper proposes a parabolic external structure to enhance the turbine's power generation efficiency.The computational fluid dynamics(CFD)method and Fluent simulation software were used to conduct a comparative analysis of the turbine's hydrodynamic performance before and after adding the external structure.The results show that adding the external structure significantly improves the stability of the flow field in the turbine's working area.Based on this,the influence of different upper-to-lower axis ratios of the external structure on the flow field characteristics and impeller performance was further investigated.It was found that adding an external structure with an axis ratio of 19∶21 optimized the water flow uniformity,maximized the impeller's power coefficient,and enhanced the turbine's stability and power generation efficiency.
吴其桧;高强;高艳婧;李亚宁;严鹏飞
中北大学机械工程学院,山西 太原 030000中北大学机械工程学院,山西 太原 030000中北大学机械工程学院,山西 太原 030000中北大学机械工程学院,山西 太原 030000中北大学机械工程学院,山西 太原 030000
信息技术与安全科学
低流速外部结构上下轴比例水流稳定性发电效率
low velocityexternal structureupper-to-lower axis ratiowater flow stabilitypower generation efficiency
《中国农村水利水电》 2026 (1)
152-156,5
山西省基础研究计划青年科学研究项目(202203021222053)山西省基础研究计划联合资助项目(太重)(202403011212007).
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