基于流固耦合的混流式水轮机转轮应力特性分析

Stress analysis of Francis turbine runner based on fluid-structure coupling

本研究采用顺序流固耦合方法,计算了某设计中的混流式水轮机转轮在不同水头下发额定出力时的静应力分布,以及设计最高水头额定出力工况下的动应力特性。静应力计算的结果表明:最大应力出现在叶片出水边与上冠连接处,并且随着水头增高,静应力最大值有减小趋势。动应力的计算结果表明:设计的转轮,动应力的幅值满足稳定运行的要求。

This study uses fluid-structure coupling （FSC） method to turbine runner under rated power and different working heads and the high working head. Calculations show that peak static stress occurs at shroud, and that this peak value decreases as the head increases operation. calculate the static stress of a Francis dynamic stress under rated power and the joint of blade trailing edge to the And the runner is safe and in stable