流体机械

2021, v.49;No.586(04) 35-41+84

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水轮机模式液力透平叶片进口安放角影响分析
Influence analysis of blade inlet angle of T-type hydraulic turbine

陈金保;肖志怀;李延频;胡晓;刘东;张利红;
CHEN Jinbao;XIAO Zhihuai;LI Yanpin;HU Xiao;LIU Dong;ZHANG Lihong;School of Power and Mechanical Engineering,Wuhan University;Key Laboratory of Hydraulic Machinery Transients,Ministry of Education,Wuhan University;School of Ural,North China University of Water Resources and Electric Power;State Key Laboratory of Water Resources and Hydropower Engineering Science,Wuhan University;Water Conservancy Institute,North China University of Water Resources and Electric Power;

摘要(Abstract):

针对转轮叶片进口安放角β_1对超低比转速水轮机模式液力透平性能影响规律认识不足的问题,在超低比转速范围内,考虑液力透平水力性能,取不同β_1建立超低比转速混流式转轮三维模型,配合过流部件构建超低比转速水轮机模式二级液力透平模型,采用ANSYS FLUENT仿真软件对液力透平内部流动特性和能量特性进行计算,对比数值模拟结果,探求β_1对超低比转速水轮机模式液力透平性能影响规律。研究表明,超低比转速水轮机模式液力透平的扬程和效率与β_1有密切关系,当β_1增大时,扬程增高,效率降低;随着β_1增大,转轮叶片弯曲程度增大,导致叶片高压区面积增大、转轮内部流体流态变差。
In view of insufficient understanding of the influence of blade inlet angleβ_1 on the performance of T-type hydraulicturbine with ultra-low specific speed,considering the performance of the hydraulic turbine in the ultra-low specific speed range,the three-dimensional model of Francis runner was established by taking different β_1,and the two-stage T-type hydraulic turbine was constructed with the flow passage components,and internal flow characteristics and energy characteristics were calculated by the ANSYS FLUENT software.The influence rules of β_1 were explored by comparing the numerical simulation results.The results show that the head and efficiency of T-type hydraulic turbine with ultra-low specific speed are closely related toβ_1.Whenβ_1increases,the head increases and the efficiency decreases;and the bending degree of blade of the runner increases,causing the increase of high-pressure area of blade and the deterioration of fluid flow state in the runner.

关键词(KeyWords): 比转速;液力透平;水轮机;转轮;数值模拟;原动机
specific speed;hydraulic turbine;water turbine;runner;numerical simulation;prime mover

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基金项目(Foundation): 国家自然科学基金项目(51979204、51579104)

作者(Author): 陈金保;肖志怀;李延频;胡晓;刘东;张利红;
CHEN Jinbao;XIAO Zhihuai;LI Yanpin;HU Xiao;LIU Dong;ZHANG Lihong;School of Power and Mechanical Engineering,Wuhan University;Key Laboratory of Hydraulic Machinery Transients,Ministry of Education,Wuhan University;School of Ural,North China University of Water Resources and Electric Power;State Key Laboratory of Water Resources and Hydropower Engineering Science,Wuhan University;Water Conservancy Institute,North China University of Water Resources and Electric Power;

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