摘要
在人工轴流心脏泵的设计过程中,叶片数目的选取对泵的工作条件的影响很大。为了获得轴流心脏泵模型的合理叶片数目,本文采用了六面体结构网格和非结构四面体网格相结合的方法,对整个流体区域进行了网格划分。通过全流道的计算机数值模拟结果,并结合血液泵传输过程中的要求进行分析,最终得到了合适的轴流血液泵叶片数目。计算结果表明,四叶片的转子是目前采用的泵型中效率、受力、流体等各方面的因素综合考察最好的。
During the design procedure for axial flow blood pump, proper blade number is important to whole flow performance in the pump. To investigate the influence of blade number on flow vectors, shear stresses, pump efficiency to the model, based on which finally actually blade number is decided, computational fluid dynamic （CFD） was applied to simulate the detailed flow performance. Structured and unstructured grids were combined to whole flow area for CFD simulations under the designed working situation. The results show that four blades impeller is much better tban three or five blades impeller in efficiency, shear stress and flow performance. It is concluded that four blades model is accepted in the design for axial heart pump.
出处
《北京生物医学工程》
2007年第6期589-592,共4页
Beijing Biomedical Engineering
