水力发电学报2014，Vol.33Issue(3)：267-273,7.
基于流固耦合的贯流式水轮机应力分析
Stress analysis of tubular turbine based on fluid-structure coupling
摘要
Abstract
Static stress and dynamic stress have been calculated by using a code ANSYS Workbench for a tubular turbine under three working conditions of maximum water head,designed water head,and minimum water head,with one-way coupling and two-way fluid-structure coupling methods.The results show that in the three conditions,all the peaks of static and dynamic stresses of the runner appear at the location of blade-hub connection where the stress concentration is obvious while the deformation increases from the root to its peak location at the blades' outer edges.For guide vane,the peaks of its static and dynamic stresses are at the root and its peak deformation at the outer edge,and these peak values are lower than those of the runner.In the condition of maximum water head the peak static stress and peak dynamic stress of the runner and guide vane are greater than those in the other two working conditions.In all the working conditions,the peak static stress is far below the material yield limit and the peak dynamic stress is as much as 79％ of the limit value.This means that it is the dynamic stress rather than the static one that may become a cause for cracks on blade and guide vane.关键词
贯流式水轮机/流固耦合/静应力/动应力Key words
tubular turbine/ fluid-solid coupling/ static stress/ dynamic stress分类
能源科技引用本文复制引用
张福星,郑源,魏佳芳,丁琳,杨春霞..基于流固耦合的贯流式水轮机应力分析[J].水力发电学报,2014,33(3):267-273,7.基金项目
国家自然科学基金项目(51076041):海洋可再生能源专项资金项目(GHME2011CX02) （51076041）
