多喷嘴冲击式水轮机配水环管结构对效率的影响  

Multiple nozzles Pelton turbine the water distribution pipe structure affect of efficiency

作　　者：王兴林[1] 宋文武[1] 

机构地区：[1]西华大学能源与环境学院,四川成都610039

出　　处：《机械》2013年第3期36-40,共5页Machinery

基　　金：研究生科技创新基金(YCJJ201127)

摘　　要：配水环管是多喷嘴冲击式水轮机的重要的过流部件,有研究表明冲击式水轮机水力效率损失40%产生于导水机构。为提高冲击式机组机效率和喷嘴出流稳定性,针对配水环管进行优化设计是有必要的。结合某电站六喷嘴冲击式水轮机配水环管进行三维数值模拟,基于N-S方程,采用CFD技术,对于有加强筋配水环管和无加强筋配水环管的水力性能进行对比,模拟配水环管分岔处点的流动状态,依据模拟出的流速、静压、流态分析配水环管内部复杂的流动基理。计算分析在有、无加强筋板下环管的水力损失、出流稳定性,预测有无加强筋环管的水力性能。Water distribution loop multi-nozzle Pelton turbine flow passage components, studies have shown that the impulse turbine hydraulic efficiency loss of 40% of the production in the water guide. In order to improve the efficiency of the impact Chiller and nozzle stream stability necessary to optimize the design of water distribution loop. In this paper, the six nozzle Pelton turbine of a power station water distribution loop three-dimensional numerical simulation based on the Navier - Stokes equations using CFD technology, compared ribs with water loop and no strengthening tendons water distribution loop hydraulic performance simulation of the water distribution loop the bifurcation at flow state, based on simulated flow rate, static pressure, flow pattern analysis within the water distribution loop complex flow-based management. Computational analysis loop hydraulic losses in the presence or absence of ribs plate under a stream stability, predict whether the stiffener ring tube hydraulic performance.

关 键 词：冲击式水轮机 配水环管 三维建模 数值模拟 效率 

分 类 号：TK735[交通运输工程—轮机工程]