관류익형송풍기의 공력해석 및 설계

초록

A tubular centrifugal fan is designed by using various methods of analysis and design. A preliminary design method based on empirical optimum curves for centrifugal fan is used to determine the geometric parameters for tubular centrifugal fan. And, Quasi-3D streamline curvature duct-flow analysis is used to provide the primary position of streamlines and spanwise distribution of flow angle for generation of blade geometry based on S1 surface. Three-dimensional CFD solution then is obtained to optimize the blade design. Constriction of flow path in the region of impeller, backward swept blade, and central cone, which are introduced to improve the design, successfully remove or suppress the vortices downstream of the impeller.