Centrifugal pumps are considered to be less destructive to blood elements (1) when compared to roller pumps. However, their large prime volumes render them unsuitable as arterial pumps in heart lung machine (HLM) circuitry for children. In November of 2014, the circuit at Arnold Palmer Hospital, a Biomedicus BP-50 with kinetic assist venous drainage (KAVD) and 1/4″ tubing was converted to a rol...

The inducer is a very small booster pump, lifting the suction pressure to a sufficient level for the main conventional impeller. By adding the inducer to high speed centrifugal pumps, NPSHr can be reduced to a great extent. Liquid with high gas content can be pumped successfully with inducer equipped pumps. Even low NPSHr allows a smaller, higher speed low horsepower pump, saving energy and cap...

We present preliminary results from numerical simulations of blood flow in a prototype of a centrifugal pump. The simulations involve incompressible Navier-Stokes governing equations, stabilized space-time finite element formulations, and parallel implementation on distributed memory architectures. The examples illustrate our approach of custom hybrid structured-unstructured tetrahedral meshes,...

In order to study the influence of a balance hole’s diameter on cavitation performance low specific-speed centrifugal pumps, pump with specific speed 0.301 was selected as research object. The pump’s performance, distribution vapor in impeller, and axial force impeller were studied change diameters holes. results show that increase holes, number σ3% became small, pressure mechanical seal cavity...

For the centrifugal pump, rotor–stator interaction (RSI) induces high-energy pressure pulsation, which directly affects stability of systems and equipment. Therefore, this work proposes a new staggered impeller structure to suppress pulsation in pumps. The original blade is divided into two layers at 10°, 20° 30° form impeller. dynamic characteristics both are predicted using large eddy simulat...