中国电机工程学报2012，Vol.32Issue(32)：124-130,前插19,8.
筒阀两种动水关闭方式下水力特性分析
Analysis on Hydraulic Characteristics of Ring Gate in Two Kinds of Emergency Shut-down Processes
摘要
Abstract
To study the hydraulic characteristics of the Francis hydraulic turbine in its runaway quit process more comprehensively, the three-dimensional unsteady numerical simulation was made on the 60 s and 26 s shut-down processes, the computational control domain was the whole passage in hydraulic turbine. The RNG k-s turbulence models, dynamic mesh and sliding mesh were adopted in the simulation, further detail comparative analyses were made on the two emergency shut-down methods including the pressure and velocity distribution on the flow field around the ring gate, as well as the flow field characteristics of the diversion components such as the spiral case, guide vanes and the runner. The results show that the 26 s shut-down method spends less time than the 60 s shut-down method in the runaway process, which is in favor of operation stability, as well as bringing down the damage caused by the runaway phenomenon more effectively. The results also have some reference value for both researching more reasonable motion method of the ring gate and the hydraulic design and optimizing of the hydraulic turbine in the future.关键词
混流式水轮机/筒阀/数值模拟/动水关闭/水力特性Key words
Francis hydraulic turbine/ ring gate/ numerical simulation/ emergency shut-down flow/ hydraulic characteristics分类
能源科技引用本文复制引用
肖聚亮,郭少辉,王国栋,洪鹰..筒阀两种动水关闭方式下水力特性分析[J].中国电机工程学报,2012,32(32):124-130,前插19,8.基金项目
天津市科技支撑重点项目(09ZCKFGX03400) （09ZCKFGX03400）
天津大学青年教师培养基金B类项目(TJU-YFF-08B24). （TJU-YFF-08B24）
