Hosoda Kyohei, Ishii Kohei, Isoyama Takashi, Saito Itsuro, Inoue Yusuke, Ariyoshi Kouki, Ono Toshiya, Nakagawa Hidemoto, Imachi Kou, Kumagai Hiroshi, Abe Yusuke
Department of Biomedical Engineering, Graduate School of Medicine, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan.
J Artif Organs. 2014 Mar;17(1):9-15. doi: 10.1007/s10047-013-0739-8. Epub 2013 Dec 7.
The helical flow pump (HFP) was invented to develop a total artificial heart at the University of Tokyo in 2005. The HFP consists of the multi-vane impeller involving rotor magnets, a motor stator and pump housing having double-helical volutes. To investigate the characteristics of the HFP, computational fluid dynamics analysis was performed. Validation of the computational model was performed with the data of the actual pump. A control computational model in which the vane area corresponded approximately to that of the actual pump was designed for the parametric study. The parametric study was performed varying the vane height, vane width and helical volute pitch. When the vane height was varied from 0.5 to 1.5 times that of the control computational model, the H-Q (pressure head vs. flow) and efficiency curves were translated in parallel with the vane height. When the vane height was two and three times that of the control computational model, the profile of these curves changed. From the results, the best proportion for the vane was considered to be a vane height between 1.5 and 2 times the vane width. The effect of vane width was not very strong compared to that of the vane height. A similar tendency in vane height was observed by varying the helical volute pitch. The best helical volute-pitch size is considered to be between 1.5 and 2 times the vane width. Although further study is necessary to determine the best values for these parameters, the characteristics of the pump parameters in the HFP could be approximately clarified.
螺旋流泵（HFP）于2005年由东京大学发明，用于开发全人工心脏。HFP由包含转子磁体的多叶片叶轮、电机定子和具有双螺旋蜗壳的泵壳组成。为了研究HFP的特性，进行了计算流体动力学分析。利用实际泵的数据对计算模型进行了验证。为进行参数研究，设计了一种叶片面积与实际泵大致相当的控制计算模型。通过改变叶片高度、叶片宽度和螺旋蜗壳螺距进行参数研究。当叶片高度在控制计算模型的0.5至1.5倍之间变化时，H-Q（压头与流量）曲线和效率曲线随叶片高度平行平移。当叶片高度为控制计算模型的2倍和3倍时，这些曲线的轮廓发生了变化。根据结果，叶片的最佳比例被认为是叶片高度为叶片宽度的1.5至2倍。与叶片高度相比，叶片宽度的影响不是很强。通过改变螺旋蜗壳螺距，观察到了与叶片高度类似的趋势。最佳螺旋蜗壳螺距尺寸被认为是叶片宽度的1.5至2倍。尽管需要进一步研究以确定这些参数的最佳值，但HFP中泵参数的特性可以大致阐明。
