Abstract
This article describes a bladeless turbo machine impeller that transfers energy from rotor to fluid over a structure of porous material. Impeller construction is described and theoretical description of fluid flow through rotating porous material is given. Pressure drops for impellers made of different materials and with different design parameters in dependence on air volume flow rate were measured. Measurements of local air flow velocity field close to impeller circumference were performed on a stationary impeller with one component hot-wire anemometer. Air flow velocity dependence on local material structure and volume flow rate was analysed. Integral characteristics measurements for different impellers made of different materials and with different design parameters are presented. Local measurements of local radial and tangential velocities close to rotating impeller circumference are shown.
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