摘要
为研究设计的人工心脏泵内流动细节,采用k-ω湍流模型,利用标准壁面函数衔接粘性底层低雷诺数区与湍流充分发展区,用FLUENT求解器计算心脏泵内紊流流场.数值计算结果表明,设计的心脏泵总体流场没有明显的流动分离、涡流、滞流等现象,但在动叶片外缘有较大的速度梯度,动叶片入口区有重复循环、流动分离、涡流等不规则的流动模式.进一步优化叶片外形、导流体模型可改善流场情况,更符合血液的流体动力学行为.
To investigate the flow field details in the artificial heart pump,the standard wall function which joins the low Reynolds number viscous sublayer with the fully developed turbulence zone was solved by k-εturbulence model of FLUENT.The CFD numerical simulation results show that there are no obvious large-scale separation,vortex structure and stagnating flow area in the overall flow field of the artificial heart.But large velocity gradient in the edge zone of moving blade and the flow patterns of circulation flow,separation,vortex in the entrance of the moving blade are discovered.According to the research,better shape of the blade and model of flow guiding body can further improve the flow situation which is better consistent with the blood fluid dynamics behavior.
出处
《中北大学学报（自然科学版）》
CAS
北大核心
2015年第6期661-665,共5页
Journal of North University of China(Natural Science Edition)
基金
国家自然科学基金资助项目(51476150)
山西省国际科技合作项目(204081028)
关键词
人工心脏泵
计算流体力学
流场结构
数值计算
artificial heart pump
computational fluid dynamics
flow structure
numerical simulation
