小开度含沙条件下冲击式机组喷针寿命折损研究OA
Research on the Life Degradation of Jet Needles in Pelton Turbines Under Small Opening Conditions with Sediment-Laden Flow
在我国"双碳"战略背景下,高水头冲击式水电机组在西南地区的开发中具有重要地位,其喷针部件在小开度工况下因泥沙磨损导致的寿命损耗值得关注.以某高原水电站为研究对象,针对小开度条件下喷针寿命折损问题,以实验室泥沙试验为基础,提出了一种基于层次分析法(AHP)和支持向量回归(SVR)的联合建模方法.通过AHP提取泥沙浓度、粒径分布等关键工况特征的权重,结合SVR算法构建喷针寿命折损预测模型,并利用实际电站数据验证模型的准确性.研究结果表明,小开度工况下(开度<0.4),喷针额外寿命损耗显著增加,且低泥沙浓度条件下粒径影响占主导地位.
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.
张海库;陈昱霖;陈磊;谭晓霞;邓飞远;郑阳
大唐水电科学技术研究院有限公司,四川 成都 610036武汉大学动力与机械学院,湖北 武汉 430072大唐水电科学技术研究院有限公司,四川 成都 610036大唐水电科学技术研究院有限公司,四川 成都 610036西藏大唐扎拉水电开发有限公司,西藏 昌都 851299武汉大学动力与机械学院,湖北 武汉 430072
建筑与水利
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
Pelton turbinejet needle lifespan degradationsmall-opening conditionsediment erosionAHPSVR
《中国农村水利水电》 2026 (6)
115-119,5
国家自然科学基金项目(52009096).
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