计算力学学报Issue(6)：769-774,6.DOI:10.7511/jslx201406014
水泵水轮机泵工况驼峰特性形成机理瞬态数值研究
Numerical study on unstable head-discharge performance in pump-turbine considering the transient rotor-stator interactions
摘要
Abstract
The unstable head-discharge characteristic affects the stability and security of pump-turbine.In pump mode,the unstable phenomenon may occur when the pump-turbine is starting,shutting down or running at the maximum head condition.To investigate this phenomenon,numerical simulation with SST k-ωturbulence model was conducted.Both steady and transient analysis type were used to forecast the head-discharge characteristic.The whole flow passage was modeled with the adj ustable vane opening an-gle of 20 degrees.The Transient Rotor Stator (TRS)model which considering the transient interaction was set respectively at the “draft tube-runner”and “runner-adj ustable vane”interfaces.In this study, head-discharge curves were plotted and the head losses in the flow passages were calculated to reveal the mechanism of the unstable head variation.Results show that the unstable head-discharge performance is related to the vortex structure and accompanying loss.Compared with steady analysis,the result of tran-sient analysis is more coincident with experimental data and has a more realistic flow field variation in front and behind the rotor-stator interfaces.The transient analysis with considering rotor-stator interac-tions is more suitable for pump-turbine and other turbo-machinery especially under off-design condi-tions.So,this study will provide more valid guidance to improve the operating stability of pump-tur-bines.关键词
水泵水轮机/CFD模拟/驼峰特性/动静交接面Key words
pump-turbine/CFD simulation/unstable head-discharge/rotor-stator interaction分类
数理科学引用本文复制引用
肖若富,陶然,刘伟超..水泵水轮机泵工况驼峰特性形成机理瞬态数值研究[J].计算力学学报,2014,(6):769-774,6.基金项目
国家自然科学基金(51139007) （51139007）
大北农青年学者研究计划(2413001)资助项目 （2413001）
