Investigations of Air-Flow Configuration, Heat Transfer Behavior and Thermal Performance in Heat Exchangers with XVB-Type Turbulence Generators Under Turbulent Flow Conditions

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dc.contributor.authorBoonloi, Amnart
dc.contributor.authorJedsadaratanachai, Withada
dc.date.accessioned2026-08-06T10:49:51Z
dc.date.available2026-08-06T10:49:51Z
dc.date.issued2025-01-01
dc.description.abstractThis study employs numerical modeling using the finite volume method to analyze airflow and thermal structures when vortex flow (VTF) generators are installed in heat exchanger square ducts (HX-SD). The VTF generator used in this study is the X-V baffle (XVB), which is designed to enhance heat transfer rates. The XVB is an evolution of the V-baffle, a type of VTF generator known for its efficiency in improving heat transfer. It features an X-shaped structure (considered in the cross-sectional (CS) plane, y-z plane) to further optimize the design. The present research investigates the effects of XVB thickness, represented by the thickness ratio (b) to the HX-SD height (H) or hydraulic diameter (Dh) (b/H), with B-R values ranging from 0.05 to 0.20. Additionally, three XVB configurations (Types A, B, and C) are examined, along with two airflow directions: AFD-VD (airflow direction – V-Downstream) and AFD-VU (airflow direction – V-Upstream). The investigation focuses on turbulent flow conditions, analyzing air velocity within a Reynolds number range of Re = 3,000 to 16,000. The results indicate that VTF is generated throughout the HX-SD due to the pressure difference caused by flow obstruction from the XVB in all cases examined. By enhancing air mixing and disrupting the thermal boundary layer (Th-BL), the induced VTF significantly increases the heat transfer rate. The maximum observed increase in heat transfer was 7.95 times higher than that of a smooth, empty duct.
dc.identifier.citationMathematical Modelling of Engineering Problems, 12(4), 1137-1149, 2025
dc.identifier.doi10.18280/mmep.120405
dc.identifier.issn23690739
dc.identifier.other2-s2.0-105007537935
dc.identifier.urihttps://dspace.kmitl.ac.th/handle/123456789/16635
dc.sourceMathematical Modelling of Engineering Problems
dc.subjectcomputational fluid dynamics
dc.subjectpassive method
dc.subjectthermal enhancement factor
dc.subjectXVB
dc.titleInvestigations of Air-Flow Configuration, Heat Transfer Behavior and Thermal Performance in Heat Exchangers with XVB-Type Turbulence Generators Under Turbulent Flow Conditions
dc.typeArticle

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