Flow Visualization Study to Investigate the Secondary Flow Behind the Impeller in the Gyro Centrifugal Pump
| Autor: | Julia Glueck, Seiji Ichikawa, Hiroshi Ishitoya, Tadashi Motomura, Minoru Mikami, Kenji Nonaka, Joerg Linneweber, Yukihiko Nosé, Toshiyuki Shinohara, Shinji Kawahito, Ikuya Nishimura |
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| Rok vydání: | 2002 |
| Předmět: |
Flow visualization
Engineering Bearing (mechanical) business.industry Flow (psychology) Biomedical Engineering Medicine (miscellaneous) Mechanical engineering Bioengineering Equipment Design General Medicine Mechanics In Vitro Techniques Secondary flow Centrifugal pump Slip factor law.invention Biomaterials Impeller law Heart-Assist Devices Current (fluid) Rheology business |
| Zdroj: | Artificial Organs. 26:1050-1052 |
| ISSN: | 1525-1594 0160-564X |
| Popis: | The Gyro permanently implantable pump consists of a sealless pump housing and an impeller supported with a double pivot bearing. The secondary vanes are attached to increase the secondary flow to avoid thrombus formation behind the impeller. Flow visualization studies using an oil film method were performed on three types of impellers: no secondary vanes, 0.5 mm height secondary vanes, and 1.0 mm height secondary vanes. Comparison studies of these impellers were performed on the surfaces of the impeller bottom and bottom housing. Regarding the surface of the impeller bottom, the impeller with no secondary vanes had the least stagnant areas around the shaft. On the other hand, the impeller having 1.0 mm height secondary vanes had the most distinguished flow lines on the bottom housing. Overall, the impeller secondary vanes with a height of 0.5 mm (current design) seemed to create the most effective secondary flow. |
| Databáze: | OpenAIRE |
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