水力发电学报2011，Vol.30Issue(1)：160-164,5.
引水部件水力损失对水轮机增容后效率的影响
Study on hydraulic loss upstream the runner and its effects on efficiency of refurbished turbine
摘要
Abstract
The rehabilitation projects have a huge market in China.In these projects, the flow rates of the turbines are always increased to increase the output.Since the buried parts and the rotational speed keep unchanged, the increase of flow rate will raise hydraulic loss in the whole flow path, thus may decrease the efficiency.In this paper, the hydraulic losses in spiral casing, stay vanes and guide vanes and their effects on the output and efficiency are analyzed.A method is proposed to evaluate the flow rate and guide vane opening for the refurbished turbines.As an example, the hydraulic losses in buried parts of a real case are calculated through flow simulations and the efficiency of the refurbished turbine is evaluated based on these results.Modification of the guide vane profile is suggested for higher efficiency with less flow rate increase.关键词
水轮机/增容改造/水力损失/水轮机效率分类
能源科技引用本文复制引用
周凌九,徐红新,崔涛,王正伟..引水部件水力损失对水轮机增容后效率的影响[J].水力发电学报,2011,30(1):160-164,5.基金项目
国家自然科学基金资助项目(50879088) （50879088）
中央高校基本科研业务费专项资金项目资助(2009-2-12) （2009-2-12）
