TY - JOUR 
A1 - Martínez, Pedro
AU - Vicente, Pedro
AU - Viedma Robles, Antonio
AU - Crespí Llorens, Damián
T1 - Effect of the axial scraping velocity on enhanced heat exchangers
Y1 - 2013
SN - 0142-727X
UR - http://hdl.handle.net/10317/5478
AB - The flow pattern within an enhanced tubular heat exchanger equipped with a
reciprocating scraping device is experimentally analysed. The insert device,
specially designed to avoid fouling and to enhance heat transfer, has also
been used to produce ice slurry. It consists of several circular perforated
scraping discs mounted on a coaxial shaft. The whole is moved alternatively
along the axial direction by a hydraulic cylinder.
The phase-averaged velocity fields of the turbulent flow have been obtained
with PIV technique for both scraping semi-cycles. Special attention
has been paid to the effect of the non-dimensional scraping velocity and the
Reynolds number in the flow field. CFD simulations provide support for the
identification of the flow patterns and the parameter assessment extension.
The results show how the scraping parameters affect the turbulence level
produced in the flow and therefore the desired heat transfer enhancement.
KW - Mecánica de Fluidos
KW - Heat transfer enhancement
KW - Visualization study
KW - Turbulence level,
KW - Numerical simulation
KW - Insert device
KW - 2204.04 Mecánica de Fluidos
LA - eng
ER -