Open Access
ARTICLE
IMPACT OF THREE DIFFERENT DOUBLE BAFFLE DESIGNS ON THE THERMAL PERFORMANCE OF SQUARE DUCTS
Amnart Boonloia, Withada Jedsadaratanachaib,*
a Department of Mechanical Engineering Technology, College of Industrial Technology, King Mongkut’s University of Technology North Bangkok,
Bangkok 10800, Thailand
b Department of Mechanical Engineering, School of Engineering, King Mongkut’s Institute of Technology Ladkrabang, Bangkok 10520, Thailand
*
Corresponding author. Email: withada.je@kmitl.ac.th
Frontiers in Heat and Mass Transfer 2022, 19, 1-13. https://doi.org/10.5098/hmt.19.26
Abstract
CFD analyses of flow characteristics and heat transfer topology in a heat exchanger duct (HXD) placed with three various configurations of the double
V-baffles (DVB) are reported. Parameters of interest are DVB height ratios (b/H = 0.05 – 0.25), gap spacing ratios (g = 0.05 – 0.40), flow directions
(+x, -x), and DVB configurations (Type I, II and III). Laminar flow with Reynolds numbers (based on the inlet conditions) between 100 – 2000 is
measured. The present problem is solved with the finite volume method (a commercial program). Fluid flow and heat transfer characteristics in the
tested duct are described. Thermal assessments of the tested duct are also presented. Simulation results showed that the installation of the DVB in the
HXD results in higher heat transfer rate due to the creation of the vortex flow and the disturbance of the thermal boundary layer (TBL). Different flow
structures and heat transfer behavior are observed when gap spacing ratios, flow directions and DVB shapes are changed. In addition, the type II DVB
provides the highest TEF of 3.55 at b/H = 0.10, g/H = 0.25 for the -x flow direction.
Keywords
Cite This Article
Boonloi, A., Jedsadaratanachai, W. (2022). IMPACT OF THREE DIFFERENT DOUBLE BAFFLE DESIGNS ON THE THERMAL PERFORMANCE OF SQUARE DUCTS.
Frontiers in Heat and Mass Transfer, 19(1), 1–13.