The design of a single rotor axial flow fan for a cooling tower application

[摘要] ENGLISH ABSTRACT: A design methodology for low pressure rise, rotor only, ductedaxial flow fans is formulated, implemented and validated usingthe operating point specifications of a 1/6th scale model fanas a reference. Two experimental fans are designed by means ofthe design procedure and tested in accordance with BritishStandards 848, Type A.The design procedure makes use of the simple radial equilibriumequations, embodied in a suite of computer programs. Theexperimental fans have the same hub-tip ratio and vortex distribution,but differ in the profile section used. The firstdesign utilises the well known Clark-Y aerofoil profile whilstthe second takes advantage of the high lift characteristics ofthe more modern NASA LS series.The characteristics of the two designs are measured over theentire operating envelope and compared to the reference fanfrom which the utility and accuracy of the design procedure isassessed. The performance of the experimental fans compareswell with both the reference fan as well as the design intent.

[发布机构] Stellenbosch University