摘要
抽水蓄能电站岔管体型及其内双向水流流态对水头损失影响较大,直接关系到电站运行效率和长期效益,近年来受到高度关注。在满足结构要求的前提下,本文以减小岔管水头损失为主要优化目标,应用CFD技术对抽水蓄能电站岔管进行水力优化。首先介绍数学模型和计算方法,并通过与实验数据的对比验证计算模型。在确认计算准确性的基础上,以月牙肋岔管为对象,分析肋宽比、分岔角、管径比、扩散率等体型参数对岔管水头损失影响的规律,为岔管体型优化提供依据。接着计算一管四机连续分岔的岔管群,探讨相邻岔管之间的水力影响。进而以某抽水蓄能电站岔管为例进行水力优化分析,给出优化体型。最后总结体型优化规律,指出岔管设计中应注意的事项。
Pipe bifurcation in the water delivery pipe system of a pumped-storage power station is curcial to the flow and its head loss.In recent years the study of bifurcation flows and bidirectional flows attracts a great attention.In this paper a CFD optimization of the bifurcation hydraulic behaviors to reduce head loss is presented.The mathematical model and numerical scheme are validated by using the head loss data measured on a physical model.The simulated flows and head losses of crescent-rib bifurcations are analyzed to determine the influences of rib breadth ratio,bifurcation angle,discharge bifurcation,radius ratio and amplification degree,and to study the interaction of adjacent bifurcations of a one-penstock-four-hydro turbine bifurcation system.Finally optimization results of a practical pumped-storage power station are given and general rules of bifurcation design are discussed.
出处
《水力发电学报》
EI
CSCD
北大核心
2010年第3期84-91,共8页
Journal of Hydroelectric Engineering
关键词
抽水蓄能电站
CFD
岔管
水头损失
水力优化
pumped-storage power station
CFD
pipe bifurcation
head loss
hydraulic optimization
