摘要
本文采用雷诺时均的N-S方程和k-ε紊流模型,采用有限体积法和非结构化网格,对转轮区域内的流体运动进行数值模拟,获取叶片表面的受力信息,得到反映真实情况的叶片表面应力分布;将此应力分布加载至刚强度分析的叶片模型表面,采用有限元方法应力计算,实现了轴流式水轮机转轮叶片的刚强度分析。结果表明,在三个计算工况点中,算例中叶片的应力和变形最大值出现在最大水头额定出力工况。
Based on the Reynolds-averaged N-S equations and the standard k-ε model, the numerical simulation of three-dimensional flow through a axial flow runner is conducted by using the finite volume method and the nonstructural grid systems, the water pressure and the actual stress distribution on the blade surface are obtained. With finite-element method, rigidity/strength analysis of the blades of axial flow hydraulic turbine is conducted by loading the force on the blade surface of model. According to computation results, the maximal stress and distortion occur under the conditions with the maximal water head and the rated power.
出处
《水力发电学报》
EI
CSCD
北大核心
2006年第5期121-124,共4页
Journal of Hydroelectric Engineering
基金
国家自然科学基金重点项目(90410019)
关键词
水轮机
轴流式叶片
刚强度
CFD分析
有限元
hydraulic turbine
axial flow blade
rigidity/strength
CFD analysis
FEM
