Aerodynamic and acoustic integral characteristics of porous rotors

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 rot...

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Bibliographic Details
Published inForschung im Ingenieurwesen Vol. 75; no. 4; pp. 243 - 256
Main Authors Benedik, G., Širok, B., Eberlinc, M., Hočevar, M.
Format Journal Article
LanguageEnglish
Published Berlin/Heidelberg Springer-Verlag 01.12.2011
Subjects
Engineering
Mechanical Engineering
Originalarbeiten/Originals
Ergun Equation
Pressure Drop
Sound Pressure Level
Metal Foam
Vaneless Diffuser
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Summary: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.
ISSN:0015-7899
1434-0860
DOI:10.1007/s10010-011-0147-2