A prototype HeartQuest ventricular assist device for particle image velocimetry measurements.

摘要: The objective of this study is to fully characterize the flow within HeartQuest ventricular assist device (VAD), a magnetically levitated centrifugal VAD, using particle image velocimetry (PIV) identify regions potential high shear or stagnation and validate refine computational models flow. An acrylic model pump was designed constructed allow optical access into all interior pump. geometry exterior housing use novel working fluid make quantitative measurements velocity exit volute, blade passage, cut-water, tip clearance, inlet possible. Highly accurate PIV have been made in one region (the elbow), other critical will be made. These are used for investigation with hemolysis resulting from stress thrombosis caused by recirculation stagnation. Quantitative data also needed comparison dynamics (CFD) VAD. In study, experiments again proven an essential complement CFD thorough investigations inside