Abstract
The magnetically suspended centrifugal blood pump is one of the highly dependable pumps without thrombus formation and hemolysis for long-term use. This pump has the double volute casing and the impeller of 50mm in diameter with seven right angle blades for levitational stability. It is necessary to downsize the artificial heart to improve the patient's QOL. In this study, computational fluid dynamics analysis was performed about the calculation model with double and single volute and impellers of different diameter for downsizing. As a result, the pump efficiency of the calculation model with single volute casing and small-diameter impeller was found to be improved, and the specific speed of this centrifugal blood pump was found to have an upper bound.
