摘要
针对贯流式水轮机在变工况下的叶片变形,基于RNGk-ε湍流模型和SIMPLEC算法,应用流场仿真软件CFX对贯流式水轮机三维全流场进行多工况定常数值计算,将计算结果通过ANSYS软件下的WORKBENCH结合流固耦合特性对叶片的静应力和形变总量进行分析.结果表明,在协联工况下,相同水头下的叶片应力和水轮机出力成正比,最大等效应力出现在叶片与轮毂相交处,最大形变量出现在叶片轮缘处;在非协联工况下叶片的形变量大于协联工况下的变形量,而且叶片上的应力分布也不均匀.
Aimed at the deformation of blades in tubular turbine running under variable working condi- tions and based on RNG k-e turbulence mode and SIMPLEC algorithm, numerical computation of full three-dimensional stationary flow field of tubular turbine running under multiple working condition is car- ried out by using simulation software CFX. The static stress and total deformation of the blade are ana- lyzed by using the computation result and WORKBENCH in software ANSYS combined with the fluid-sol- id coupling characteristics. The results show that in the case of copying working condition and identical head, the blade stress will be proportional to the turbine output and the maximum equivalent stress at the intersection of blade and hub and the biggest deformation will appear at the intersection of blade and rim. The deformation of blade in the case of off-copying working condition will be greater than that under copy- ing working condition and the stress distribution on the blade will be non-uniform.
出处
《兰州理工大学学报》
CAS
北大核心
2015年第2期61-64,共4页
Journal of Lanzhou University of Technology
基金
国家自然科学基金(51209113)
甘肃省自然科学基金(1310RJZA023)
关键词
水轮机
叶片应力
流固耦合
hydraulic turbine
blade stress
fluid-solid coupling
