45 KB671 KB31 KB199920252008Alič, GregorSchweiger, VladoŠirok, Braneštevilka:1013 straniletnik:54str. 662-674ISSN:0039-2480COBISSID:10724891URN:URN:NBN:SI:doc-ZDB8BVWVenAssociation of Mechanical Engineers and Technicians of Slovenia et al.Zveza strojnih inženirjev in tehnikov Slovenije et al.Strojniški vestnikventilatorjizaščitaImpact of the guard grill on the integral and local characteristics of an axial fan|This paper presents the impact of the guard grill (GG) on the integral characteristic (IC) and local aerodynamic properties of the outflow of an axial fan (AF). The study of the GG's impact was conducted using measurements and numeric modelling at the integral and local levels. Measurements of IC were performed according to the ISO 5801 standard and the local velocity field was measured by using a five-hole probe. Numeric simulations of the machine's local characteristics were made in the same working conditions of the fan. The comparison of results was used in the analysis of the GG's impacton the fan's efficiency and in the analysis of the feasibility of the CFD modelling of flow conditions of the GGV prispevku je predstavljen vpliv zasčitne mreze (ZM) na integralno karakteristiko (IK) in lokalne aerodinamske lastnosti izstopnega toka aksialnega ventilatorja (AV). Studija vpliva ZM je bila izvedena z meritvami in numeričnim modeliranjem na integralnem in lokalnem nivoju. Meritve IK so bile izvedene po standardu ISO 5801, meritve lokalnega hitrostnega polja pa so bile izvedene s petluknjično sondo. Ob enakih delovnih pogojih ventilatorja so bili izvedeni tudi numerični izračuni lokalnih značilk stroja. S primerjavo rezultatov pa je bila izvedena analiza vplivnosti mrežice na učinkovitost ventilatorja in analiza smotrnosti CFD-modeliranja tokovnih razmer na mrežiciTEXTznanstveno časopisjejournalsSlovenian National E-content AggregatorNational and University Library of SloveniaUniverza v Ljubljani, Fakulteta za strojništvo