caa a22 4500 44536243X CHVBK 20180317142919.0 cr unu---uuuuu 170323e20111201xx s 000 0 eng 10.1007/s10010-011-0147-2 doi (NATIONALLICENCE)springer-10.1007/s10010-011-0147-2 Aerodynamic and acoustic integral characteristics of porous rotors [Elektronische Daten] [G. Benedik, B. Širok, M. Eberlinc, M. Hočevar] Aerodynamische und akustische Charakteristiken von Rotoren aus offenporigem Material This paper describes porous rotors manufactured from open cell aluminium foam. Rotor construction and theoretical description of fluid flow through rotating porous material are presented. Nine porous rotors made of materials with three different average pore sizes, with or without inducer, three rotor heights and two inlet diameters were selected and compared to a classical rotor with blades. Measurements involved two parts, measurement of pressure drop on non-rotating rotors while integral flow characteristics were measured on rotating rotors. Pressure drops for selected rotors agree well with theoretically calculated values based on Darcy-Forchheimer equation and Ergun equation. Measurements of integral aerodynamic and acoustic characteristics for selected rotors are presented. At low volume flow rates porous rotors have lower aerodynamic efficiency, comparable dimensionless pressure and lower noise compared to classical rotors with blades. Springer-Verlag, 2011 Benedik G. Domel d.o.o., Otoki 21, 4228, Železniki, Slovenia aut Širok B. Faculty of Mechanical Engineering, University of Ljubljana, Aškerčeva 6, 1000, Ljubljana, Slovenia aut Eberlinc M. Faculty of Mechanical Engineering, University of Ljubljana, Aškerčeva 6, 1000, Ljubljana, Slovenia aut Hočevar M. Faculty of Mechanical Engineering, University of Ljubljana, Aškerčeva 6, 1000, Ljubljana, Slovenia aut Forschung im Ingenieurwesen Springer-Verlag 75/4(2011-12-01), 243-256 0015-7899 75:4<243 2011 75 10010 https://doi.org/10.1007/s10010-011-0147-2 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10010-011-0147-2 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Benedik G. Domel d.o.o., Otoki 21, 4228, Železniki, Slovenia aut NATIONALLICENCE 700 1- Širok B. Faculty of Mechanical Engineering, University of Ljubljana, Aškerčeva 6, 1000, Ljubljana, Slovenia aut NATIONALLICENCE 700 1- Eberlinc M. Faculty of Mechanical Engineering, University of Ljubljana, Aškerčeva 6, 1000, Ljubljana, Slovenia aut NATIONALLICENCE 700 1- Hočevar M. Faculty of Mechanical Engineering, University of Ljubljana, Aškerčeva 6, 1000, Ljubljana, Slovenia aut NATIONALLICENCE 773 0- Forschung im Ingenieurwesen Springer-Verlag 75/4(2011-12-01), 243-256 0015-7899 75:4<243 2011 75 10010 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer