Abstract
A rotary blood pump designed by traditional wing theory could get remarkably low performance in pulsatile flow as compared to that in steady (nonpulsatile) flow. This is because the wing theory is not suitable for low Reynolds number and pulsatile flow like blood flow in which the pump is actually used. In the present study, investigation of a low Reynolds number and pulsatile isolated wing flow is carried out by computational fluid dynamics (CFD) and construction of experimental equipment as fundamental study. The CFD results indicated that the large scale separation on suction surface of the wing occurred during the almost all one cycle of pulsation by comparing the pulsatile and nonpulsatile inflow conditions. In order to verify the CFD results and to clarify hydraulic characteristics of low Reynolds number of 10^3 or 10^4 and pulsatile wing flow, it is constructed water tunnel testing system by which it can measure fluid forces acting on the wing in the condition of low speed flow and both pulsatile and nonpulsatile flow.
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