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Effects of tongue position and base circle diameter on the performance of a centrifugal blood pump.

机译:舌头位置和基圆直径对离心血泵性能的影响。

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摘要

This article presents numerical investigations of the effect of radial gap and volute tongue position on the circumferential pressure distribution and the magnitude of resulting imbalanced radial force. A series of volute models was designed using the constant mean velocity method. The results indicate that a radial clearance of 10% is a good practical value that gives a relatively high head across the pump for a small radial force. The results show that the tongue position at 30 degrees gives the lowest radial force and pressure head. The tongue position at 15 degrees appears to give the best compromise results producing a generated head only 5% less than the maximum value while the radial force is about 22% less than the maximum force.
机译:本文对径向间隙和蜗舌位置对周向压力分布的影响以及由此产生的不平衡径向力的大小进行了数值研究。使用恒定平均速度方法设计了一系列蜗壳模型。结果表明,径向游隙为10%是一个很好的实用值,可以在较小的径向力的情况下使泵的扬程相对较高。结果表明,舌头位置在30度时,径向力和压头最低。 15度的舌头位置似乎可以提供最佳的折衷效果,产生的头部仅比最大值小5%,而径向力比最大力小22%。

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