TY - JOUR 
A1 - Solano Fernández, Juan Pedro
AU - García Pinar, Alberto
AU - Vicente Quiles, Pedro Ginés
AU - Viedma Robles, Antonio
T1 - Flow Pattern Assessment in Tubes of Reciprocating Scraped Surface Heat Exchangers
Y1 - 2011
SN - 1290-0729
UR - http://hdl.handle.net/10317/4471
AB - Flow pattern in the tubes of an innovative scraped surface heat exchanger with
reciprocating scrapers has been experimentally investigated. The scraper consists of a concentric rod inserted in each tube of the heat exchanger, mounting an array of semicircular plugs that fit the inner tube wall. A hydraulic piston provides the scraper with constant-velocity reciprocating motion. Phase-averaged velocity fields have been obtained with PIV technique for both scraping semi-cycles, with special emphasis on the effect of the scraping velocity (velocity ratio) and Reynolds number.
Visualization results have been contrasted with experimental data on Fanning friction
factor, obtaining a clear relation between flow patterns, pressure drop augmentation
and turbulence promotion. CFD simulations for quasi-steady laminar flow provide a
further insight into the relation of the flow structures with wall shear stress, and the contribution of pressure forces to global head losses, for each scraping semi-cycle.
KW - Mecánica de Fluidos
KW - Scraped surface heat exchanger
KW - SSH
KW - Particle image  velocimetry
KW - PIV
KW - Flow pattern
KW - CFD
LA - eng
PB - Elsevier
ER -