Numerical Investigation of the Flow in the Bladed Spaces of Radial-Flow Fan-Impeller
نویسنده
چکیده
The aim of this paper is to introduce numerical procedures to calculate the flow parameters in the bladed space of a cylindrically bladed radial-flow fan-impeller. The characteristics of the flow belonging to different duty points of the fan were determined by the numerical procedure. In this calculation, the blade effects as well as the effects of the fluid friction and the turbulence were taken into consideration separately. The effects of the blade were represented hydro-dynamically by a constrain force field. The frictional effect of the fluid and the turbulence of the flow were reflected by the analogy between the flow in a rectangular channel and the flow in the bladed space of the impeller. The distributions of the average relative velocity, pressure and energy losses were calculated by solving the governing equations of the viscous flow. Key-Words: radial-flow fan-impeller, velocity and pressure fields, turbulent flows, friction energy loss.
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