中国农村水利水电Issue(6)：115-119,5.DOI:10.12396/znsd.2501096
小开度含沙条件下冲击式机组喷针寿命折损研究
Research on the Life Degradation of Jet Needles in Pelton Turbines Under Small Opening Conditions with Sediment-Laden Flow
摘要
Abstract
Under China's"Dual Carbon"strategy,high-head Pelton turbine units play a crucial role in hydropower development in the southwestern region.The lifespan degradation of jet needles due to sediment erosion under small-opening conditions deserves special attention.This study focuses on a high-altitude hydropower station,addressing the lifespan degradation of jet needles under small-opening conditions.Based on laboratory sediment tests,a hybrid modeling approach combining the Analytic Hierarchy Process(AHP)and Support Vector Regression(SVR)is proposed.The AHP method is employed to extract weightings for key operational features such as sediment concentration and particle size distribution,while the SVR algorithm is used to construct a predictive model for jet needle lifespan degradation.The model's accuracy is validated using actual power plant data.The results indicate that under small-opening conditions(opening<0.4),the additional lifespan degradation of jet needles increases significantly,with particle size exerting a dominant influence under low sediment concentrations.关键词
冲击式水轮机/喷针寿命损耗/小开度工况/泥沙磨损/层次分析法/支持向量回归Key words
Pelton turbine/jet needle lifespan degradation/small-opening condition/sediment erosion/AHP/SVR分类
建筑与水利引用本文复制引用
张海库,陈昱霖,陈磊,谭晓霞,邓飞远,郑阳..小开度含沙条件下冲击式机组喷针寿命折损研究[J].中国农村水利水电,2026,(6):115-119,5.基金项目
国家自然科学基金项目(52009096). （52009096）
