华中科技大学学报（自然科学版）2024，Vol.52Issue(1)：20-26,7.DOI:10.13245/j.hust.240653
冲击式水轮机配水环管甩负荷工况瞬态流动特性
Transient flow characteristics of water distribution ring pipe of impulse turbine under load rejection condition
摘要
Abstract
A model of the water distribution loop,nozzle,and deflector for a certain impact power plant in China was established.Unsteady calculations were conducted using a water gas two-phase model.The dynamic grid method was used to study the dynamic changes in flow velocity and pressure generated by the six nozzle water distribution loop during the transition process.Research had found that during the closing process of the water distribution ring pipe,the pressure change of the bifurcated pipe only increases in the inlet section of the pipeline,and the pressure distribution at all points after the inlet section follows the same pattern.At the beginning of the action,there is a pressure decrease trend,followed by a convex shaped pressure change rule.When the opening is closed to 0.5,there will be continuous high-frequency fluctuations,and when the opening is around 0.375,the first peak of pressure rise will be reached.When the opening reaches around 0.19,the second peak will be reached.The calculation results of the three-dimensional transition process are consistent with the pressure distribution law of the one-dimensional calculation method.关键词
冲击式水轮机/配水环管/过渡过程/动网格/水-气两相流数值模拟Key words
impulse turbine/water distribution ring pipe/transition ring pipe/dynamic grid/numerical simulation of water-gas and two-phase flow分类
能源科技引用本文复制引用
葛新峰,孟涵,邓朝钟,曹林宁..冲击式水轮机配水环管甩负荷工况瞬态流动特性[J].华中科技大学学报（自然科学版）,2024,52(1):20-26,7.基金项目
国家自然科学基金面上项目(52279083). （52279083）
