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Effects of Tongue Position and Base Circle Diameter on the Performance of a Centrifugal Blood Pump
Author(s) -
Wong YewWah,
Chan WengKong,
Hu Wei
Publication year - 2007
Publication title -
artificial organs
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.684
H-Index - 76
eISSN - 1525-1594
pISSN - 0160-564X
DOI - 10.1111/j.1525-1594.2007.00430.x
Subject(s) - volute , centrifugal pump , position (finance) , head (geology) , tongue , radial force variation , magnitude (astronomy) , radial velocity , mechanics , base (topology) , mathematics , physics , mathematical analysis , structural engineering , engineering , geology , impeller , medicine , stars , finance , pathology , geomorphology , astronomy , economics
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.