Local flow and heat transfer behavior in convex-louver fin arrays

Journal Article · Sun Jan 31 23:00:00 EST 1999 · Journal of Heat Transfer

DOI:https://doi.org/10.1115/1.2825926· OSTI ID:343653

DeJong, N C ^[1]; Jacobi, A M ^[2]

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1. Baylor Univ., Waco, TX (United States)
2. Univ. of Illinois, Urbana, IL (United States). Dept. of Mechanical and Industrial Engineering

Highly interrupted fin surfaces are widely used to enhance the air-side thermal performance of compact heat exchangers. Here, local and surface-averaged measurements of convection coefficients and core pressure-drop data are provided for an array of convex-louver fins. For a Reynolds number range from 200 to 5400, these data are complemented with a flow visualization study and contrasted with new measurements from a similar offset-strip geometry. The results clarify the effects of boundary layer restarting, shear-layer unsteadiness, spanwise vortices, and separation, reattachment, and recirculation on heat transfer in the convex-louver geometry.

• Sponsoring Organization: USDOE
• OSTI ID: 343653
• Journal Information: Journal of Heat Transfer, Journal Name: Journal of Heat Transfer Journal Issue: 1 Vol. 121; ISSN 0022-1481; ISSN JHTRAO
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
AUGMENTATION
BOUNDARY LAYERS
CONVECTION
FINS
FLUID FLOW
GEOMETRY
HEAT EXCHANGERS
PERFORMANCE
SHEAR