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Experimental investigation of flow pattern in enhanced exchangers with active insert devices

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untranslatedRef CV 97 Comunicación Milan 2006.pdf (771.5Kb)
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URI: http://hdl.handle.net/10317/8612
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Author
Solano Fernández, Juan Pedro; García Pinar, Alberto; Pedrero, José Manuel; Vicente Quiles, Pedro Ginés; Viedma Robles, Antonio
Knowledge Area
Mecánica de Fluidos
Sponsors
This research has been partially financed by the DPI2003-07783-C02 grant of the ''Dirección General de Investigación del Ministerio de Educación y Ciencia de España'' and the “HRS Spiratube” company. We would like to thank Dr. Alexander Liberzon for his PIV program, URAPIV.
Publication date
2006
Publisher
ASME
Bibliographic Citation
Solano, J. P., García, A., Pedrero, J.M., Vicente, P. G. y Viedma, A. Experimental investigation of flow pattern in enhanced exchangers with active insert devices En: ASME-ATI Conference on Energy: production, distribution and conservation”, Milán, Italia 14-17 mayo 2006
Keywords
Heat transfer
Friction factor
Flow field
Particle Image Velocimetry (PIV)
Abstract
The present paper studies the flow features induced by a mechanically assisted device inserted in a round tube. The reciprocating movement of the active insert device generates macroscopic displacements of the flow, increasing heat transfer. At the same time, the insert device scraps the inner tube wall, avoiding fouling. Particle Image Velocimetry technique has been employed to obtain the velocity field over a symmetry plane. In static conditions, two flow features have been identified, as well as its evolution for a range of Reynolds number between 44 and 369. In dynamic conditions, the flow conditions for Re=44 and two different scraping velocities have been studied. The flow features for the two stages of the scraping cycle have been identified, revealing higher velocity distributions than in the static condition.
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