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Назив: Accuracy analysis of air torque position dampers based on blade profiles and damper locations
Аутори: Bikić, Siniša 
Todorović, Bogoljub 
Bukurov, Maša 
RadojčIn M.
Pavkov, Ivan 
Датум издавања: 1-јан-2018
Часопис: Thermal Science
Сажетак: © 2017 Society of Thermal Engineers of Serbia. The primary concern of this paper is a single-blade air torque position damper used for the indirect measurement of volumetric air-flow rates by measuring the moment of airstream force exerted on the blade and the damper position. The pur-pose of the paper is to analyze the accuracy of the air velocity measurements and the adequacy of the damper mathematical model on the basis of the blade profile and the damper location in a duct system. The analysis was performed on the ba-sis of the experimentally obtained results. Four different blade profiles (flat, V-groove, symmetrical airfoil, and non-symmetrical airfoil blades) were taken into account, as well as three different damper locations in the duct system (at the duct entrance, within the duct, and at the duct exit). Two blade orientations at the duct entrance were examined relative to the direction of air-flow (with front and rear mounting flanges). It was determined that the blade profile and particularly the damper location in the duct system affect the measurement accuracy and the ade-quacy of the damper mathematical model provided the blade angle of attack is less than or equal to 30°, i. e. within the range of a more open damper.
URI: https://open.uns.ac.rs/handle/123456789/1966
ISSN: 03549836
DOI: 10.2298/TSCI160805174B
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