流固耦合作用对轴流泵内部流场影响的数值计算  

Numerical Calculation for Effect of Fluid-structure Interaction on Flow Field in Axial-flow Pump

作　　者：施卫东[1] 王国涛[1] 蒋小平[1] 张德胜[1] 恽强龙[1] 徐燕[1] 

机构地区：[1]江苏大学,江苏镇江212013

出　　处：《流体机械》2012年第1期31-34,40,共5页Fluid Machinery

基　　金：国家自然基金项目(51079063);江苏高等学校优秀科技创新团队项目(苏教科[2009]10号);江苏高校优势学科建设工程资助项目

摘　　要：采用雷诺时均Navier-Stokes方程和RNG k-ε双方程湍流模型,基于弹性体结构动力学方程,对轴流泵内部流场和叶轮结构响应进行多工况双向同步耦合求解,研究了流固耦合作用对轴流泵内部流场的影响。结果表明:考虑流固耦合作用后,叶片工作面和背面的压差有所减小,说明叶片性能有所下降;叶片出口处的二次回流现象有所加剧;计算得到的轴流泵水力性能参数更加接近试验值,说明考虑流固耦合后的流场更加接近于真实流场。A combined calculation under multiple conditions for flow field and structural response of the impeller was estab- lished using two - way coupling method, analyzed the effect of fluid - structure interaction （FSI） on flow field in axial - flow pump. For the calculation, the flow field is based on Reynolds - averaging N - S equations and two equation RNG k - ε turbulent model, and the structure resPonse is based on elastic structural dynamic equation. The results show that： the pressure difference between the pressure side and suction side decreased slightly after considering the role of FSI, indicating that blade performance decreased;The phenomenon of secondary flow at blade outlet intensified;The computed hydraulic performance parameters in axial - flow pump are much closer to experimental values,illustrating that the flow field considering FSI is much closer to the real flow field.

关 键 词：轴流泵 流固耦合 流场 数值计算 

分 类 号：TH312[机械工程—机械制造及自动化]