Experimental and numerical investigation of flow and heat transfer in lancet-type-finned cross-flow heat exchangers

In this study, the flow, heat transfer, and thermal performance of a Lancet-type finned cross-flow heat exchanger with different geometrical plate arrangements are investigated numerically and experimentally. The heat transfer between hot fluid (air) and cold fluid (water) in the fins placed in the test region and the pressure drop in the test region are investigated at different Reynolds numbers (5000-22,000). Air (rho congruent to 1.274 kg/m3 and Pr = 0.711) and water (rho = 997.4 kg/m3 and Pr = 6.78) are used as cold fluids. Taguchi experimental design method, Nusselt number, and friction factor are considered as performance parameters. As a result of the experiments performed on the designed Lancet-type finned cross-flow heat exchanger, flow and heat transfer analyses were carried out at different temperatures and flow rates. Similarly, the flow and heat transfer characteristics, three-dimensional Navier-Stokes equations, and energy equations of numerical fluid dynamics ANSYS-FLUENT air flow k-epsilon were obtained according to the standard model. After performing tests and using computers, it was found that the cross-flow heat exchanger works better when the plates are shifted than when they are lined up in a straight line.

Journal

INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER

Year

2024

Volume

159

ISSN

0735-1933

eISSN

1879-0178

DOI

10.1016/j.icheatmasstransfer.2024.108017

WoS UID

WOS:001307935000001