农业机械学报2018，Vol.49Issue(1)：137-142,6.DOI:10.6041/j.issn.1000-1298.2018.01.017
水泵水轮机泵工况空化特性与转轮受力分析
Analysis of Cavitation Performance and Force on Runner of Pump-turbine in Pump Mode
摘要
Abstract
In order to obtain the cavitation performance and force on runner of pump-turbine in pump mode,the model pump-turbine in a pumped storage power station was selected as the study object.Based on SST k-ω turbulence model and Zwart cavitation model,the numerical simulation was carried out for fully-three-dimensional unsteady flow field with different cavitation coefficients and compared with the experiment results.Turbulent kinetic energy distribution on the middle stream surface of runner and guide vanes,the vapor volume and loading distribution on blades was discussed,and then force on runner was quantitatively analyzed.Results showed that the numerical analysis results can be used to capture development of the cavitation;with the decrease of the total pressure in draft inlet,the turbulent kinetic energy was increased gradually in outlet of the runner and decreased gradually in outlet of guide vanes,vapors generated at suction side of blade near the leading edge at first and then extended to the exit of runner and pressure side of blade;due to rotor-stator interaction about runner and guide vanes and asymmetry of the volute's shape,periodicity and symmetry of variation of radial force on the runner was gradually destroyed.The research findings can reveal the cause of operation became worse for pumpturbine in pump mode.关键词
水泵水轮机/空化特性/转轮受力/数值模拟Key words
pump-turbine/cavitation characteristic/force on runner/numerical simulation分类
能源科技引用本文复制引用
李琪飞,张正杰,李仁年,王仁本,李光贤,龙世灿..水泵水轮机泵工况空化特性与转轮受力分析[J].农业机械学报,2018,49(1):137-142,6.基金项目
国家自然科学基金项目(51566009) （51566009）
