摘要
建立了基于微可压缩流体理论的相对运动的大涡模拟方法,并对混流式转轮流场进行了三维非恒定粘性数值模拟,计算方法采用了有限体积法和预测-校正方法,对固体边壁的处理使用了"壁函数"法。得到了混流式转轮的三维速度场和压力分布,与k ε模型计算结果进行比较表明,所建立的相对运动的大涡模拟方法对转轮性能预测更加精确、合理,对转轮改型设计具有十分重要的参考价值。
A large eddy simulation (LES) approach based on the weakly compressible hydrodynamic equation for the relative motion is developed in a rotational coordinate system, and employed in simulating 3D flow through a francis turbine runner.The finite volume approach with predictorcorrector method and a 'law of the wall' for the solid wall condition are used.The velocity and pressure fields are obtained and compared with the computated results by the kε model, showing that the 3D LES approach can give realistic results of the flow field.
出处
《水科学进展》
EI
CAS
CSCD
北大核心
2002年第6期675-681,共7页
Advances in Water Science
关键词
大涡模拟
有限体积法
水轮机
转轮
流场
large eddy simulation
finite volume approach
turbine runner
flow field
