【摘要】 原型血液泵LAP-00的数值模拟及实验结果表明,在设计转速9 000 r/min下,最大效率点对应的设计点流量为11 L/min,远大于临床所需3~8 L/min的流量,致使血液泵在实际应用时效率偏低;而静子区域存在的流动分离与回流,极易造成血流停滞进而引发血栓.改进后的血液泵LAP-23,将设计转速从9 000r/min降低至8 000 r/min,减小了转子叶尖切应力对血细胞的破坏;设计点流量降低至6 L/min,并消除了静子区域内的分离和回流.更多还原

【Abstract】 The numerical investigation and experimental results of the proto-pump LAP-00 show that at design rotational speed of 9 000 r/min,the flow rate corresponding to the highest efficiency point is 11 L/min,which is much higher than clinical use(3~8 L/min),causing the pump to work at off design point in clinic use with a low efficiency.Besides,in the diffuser region,flow separation and recirculation may cause blood stagnation and thrombosis.The improved design for pump LAP-23 decreases the design rotational speed from 9000 r/min to 8000 r/min,thus reduces the high shear stress on blood cells at impeller tip;meanwhile,it decreases the design flow rate to 6 L/min and eliminates flow separation and recirculation in the diffuser region.更多还原